Precious Gems and Stones in South Africa

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Precious Gems and Stones in South Africa

Not the usual blog you would find in our industry. Just a tad different with interesting thoughts and insights you might not have ever thought about before.

All the bright images of these “bling’s” comes to mind from beauty and great riches for so many centuries.
Come to think about it gemstones have long fascinated the human population. Not only to be used as investments by the rich, who used to show off the red rubies, shiny diamonds or the enormous emeralds to display wealth, status and power owned only by the royalty. People have treasured gems for many reasons throughout history.

Believe it not, the gems and stones inspired myths, curses and has been used as medicine before. Religious symbols, amulets and good-luck charms are one of the most known reasons today. Ancient people believed that certain gems would protect them from misfortune, illness and unhappiness. All the gemstones we so greatly treasure and admire come from various depths and locations in the earth’s crust.

I can write forever and a day about all the different stones and gems and all the superstition symbols of hope, luck, and many more. But can’t help myself to name the most obvious.
The number twelve is common in gem lore. Twelve gems that represented the twelve tribes of Israel were set in the breastplate of Aaron, the first high priest of the Hebrews. Among Christians, symbolic gems represented the twelve apostles.

The Twelve Tribes The Twelve Apostles
1. Levi, garnet Peter, (Jasper)
2. Zebulon, diamond Andrew, (Sapphire)
3. Gad, amethyst James, (Chalcedony)
4. Benjamin, jasper John, (Emerald)
5. Simeon, chrysolite Philip, (Sardonyx)
6. Issachar, sapphire Bartholomew, (Sard)
7. Naphtali, agate Matthew, (Chrysolite)
8. Joseph, onyx Thomas, (Beryl)
9. Reuben, sard James the Less, (Topaz)
10. Judah, emerald Judy, (Chrysolprase)
11. Dan, topaz Simon, (Hyacinth)
12. Asher, beryl Judas, (Amethyst)

In addition, gems have long been associated with the signs of the zodiac and with the sun, moon, and planets.

Signs of the Zodiac
Aries the ram, (Bloodstone)
Taurus the bull, (Sapphire)
Gemini the twins, (Agate)
Cancer the crab, (Emerald)
Leo the lion, (Onyx)
Virgo the virgin, (Carnelian)
Libra the scales, (Chrysolite)
Scorpio the scorpion, (Aquamarine)
Sagittarius the archer, (Topaz)
Capricorn the goat, (Ruby)
Aquarius the water bearer, (Garnet)
Pisces the fishes, (Amethyst)

Did you know that the most expensive gemstone ever sold was the Pink Star Diamond that was sold for $83 million? Also known as the ‘Fancy Vivid Pink’ diamond, this stunning gemstone was mined in 1999 in South Africa, with a weight of 59.6 carats. Because of the selling price of $83 million, this diamond became the most expensive gem ever sold.

Did you know that Queen Elizabeth crown that she has worn for 63 years also has a diamond in from South Africa? Weighing a breath-taking 3 106 carats, this diamond was discovered in 1905 by Pretoria’s Premier Mine inspector, Thomas Wells, who initially mistook it as a piece of glass placed by the miners to prank him.
When its identity was revealed, the diamond was named The Cullinan after the owner of the mine and purchased by the Transvaal government as a gift for King Edward VII. Then plans were made to have the precious diamond shipped to England on a boat, always protected by top security. However, it was later revealed to be an elaborate ruse created to fool any hopeful thieves – the Cullinan was in fact sent to England in the mail, with no security whatsoever.
Did you know in 1867 South Africa’s first diamond, later called the Eureka, was discovered on the banks of the Orange River near Hopetown by 15-year-old Erasmus Jacobs. He was playing around on his father’s Northern Cape farm at the time and a pretty transparent rock caught his eye. It was a neighbour, Schalk van Niekerk, who identified this ‘rock’ as a diamond.

So where do gems come from?
Most gemstones are minerals or rocks and occur in favoured sites in the earth’s crust or in the gravels that result from the weathering of rocks. Of the beautifully crystallized minerals that seem useful for gems, only a very few meet the standards and are sufficiently beautiful, durable, rare and large enough to be cut into saleable stones. As a class of natural objects gemstones are exceedingly rare.

About one hundred chemical elements make up the earth. Oxygen and silicon are by far the most plentiful elements in the earth’s crust, and they occur in most minerals. In gemstones, they are major ingredients in amethyst, aquamarine, emerald, garnet, peridot, topaz, tourmaline and zircon. Oxygen is a major ingredient in ruby, sapphire, chrysoberyl and spinel.

As a mineral form, certain atoms attract each other and arrange themselves in an orderly geometric pattern called the crystal structure. All mineral crystals have their atoms arranged in some combination of fourteen basic patterns.

Minerals usually occur as crystalline grains in rocks. Because the grains compete with neighbouring ones for very limited space, there usually isn’t room for complete crystal shapes to form. Time is another important factor in crystal growth. When molten rock cools quickly, natural glass or tiny crystals form. Slower cooling time gives larger crystals time to grow. Large crystals may form whenever conditions are right. They may grow slowly into open spaces in cracks or hollows in the rocks.

Occasionally, near perfect crystals are found. A mineral’s internal atomic structure determines its distinctive exterior crystal shape. Crystal shape often helps identify and distinguish gem minerals from one another.

Today, many gems can be created in laboratories. Synthetic gems have the same chemical composition and physical properties as naturally formed gemstones. A simulated gem may look like a natural gem, but there the similarity ends.
As with other gems, most precious gemstones are minerals. This mineral, however, is a chemical element or compound that forms in nature and possess a unique internal atomic structure, crystal. Minerals usually form because of inorganic processes that occur in rocks.

Furthermore, since mineral deposits can be found all over the world, so can the various gemstones.

In fact, many gems and stones come from South Africa and this is the reason why the industry remains sturdy.
Of some interest is the mining techniques used to procure such brilliant gems.

The following is a list of South Africa gems and minerals listed in our database:

• Chatoyant Quartz
• Enstatite
• Rhodonite
• Grossular Garnet
• Rhodochrosite
• Petalite
• Platinum
• Plasma Chalcedony
• Diamond
• Chrysoprase
• Microcline
• Uvarovite
• Gold
• Zoisite
• Chrysoprase
• Diopside
• Chrysoberyl
• Pyrope
• Phosphophyllite
• Labradorite
• Dravite
• Taaffeite
• Rutile
• Tugtupite
• Lapis Lazuli
• Turquoise
• Sillimanite
• Oligoclase
• Spodumene
• Gypsum
• Tektites
• Shell

 

If you are interested in buying gemstones in South Africa you need to look out for the following:

How to buy gemstones in South Africa
1. Look at the background of the seller!
2. Look at the credentials of the seller!
3. Study the gemstone.
4. Is the gemstone from South Africa or not?
5. Check the integrity of the seller.

 

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.

 

References:
Cape Town Diamond Museum
Rock Hounds
Touch Gemstones
Gemrock Auctions
Cape Town Magazine
Interflora
Gem5
Diamond Portfolio
SAMAA

 

 

 

About Christine Brooks

I started working for Leads 2 Business in June 2015 as an Account Executive until present. Looking after new and existing clients making sure we meet their requirements.

What does Google mean to me?

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What does Google mean to me?

The title made me giggle…it should say “what does Google not mean to me?”

Google is my “go-to person” for EVERYTHING that I am looking for information about, be it something I already know, or want know, or need confirmation about, or to settle an argument, anything and everything, there is pretty much nothing that Google cannot help you with.

The above got me thinking, Google has always just been “there” and I have never really thought about how it got its name, how the information gets there (for me to find) and what it all means…hmmm…this means I get to do some research (on Google of course)….

How Google did gets its name?

Turns out Google was born from a spelling mistake! What? The Grammar-nerd firmly instilled in me was horrified, turns out that Google is a misspelling of a real-life mathematical term, googol.

Back in the late 90’s, Larry Page and Sergey Brin were working on a search engine and they had called it “Backrub”……thank goodness they were smart (they were grad students at Stanford after all) and went on a brainstorming session to rename their search engine and with the help of a fellow student Sean, came up with the name “Googolplex”.

Googolplex is the name for 10 to the power of googol. Googol is the name used by mathematicians to reference 10 to the power of 100 or the number 1 followed by 100 zeros. (The name googol and googolplex were originally coined by Milton Sirotta, nephew of Edward Kasner, a famous American mathematician)
When Sean suggested googolplex, Larry thought that the term googol was better and thought that the definition of the word was a great fit for what they were trying to do which was to index an unfathomable number of Internet web pages.

Sean, not realizing googol was spelled with an ol at the end, searched the Internet to see if the domain google.com was available. Larry liked the new word Sean had accidentally come up with, and voila! Google was named.

How does Google find what I am looking for?
Google has several steps that they take in order to find and collate their information (so that you and I can find it easy-peasy)

1. Spiders/Crawling as much of the web as they can.
SPIDERS!!!! that is just creepy and I had an instant visual of an old movie from 1984 starring Tom Selleck called Runaway that had all these hundreds of little killer robots in the shape of spiders (shudder) running around but thank goodness my Arachnophobia is unfounded, it’s not that type of spider (cue nervous giggle) Google has millions of servers spread out across the globe and these are used to crawl, index and power Google’s search engines and are constantly trying to find new pages and check existing pages for updates. A search engine spider does the search engine’s grunt work: It scans Web pages and creates indexes of keywords. Once a spider has visited, scanned and categorised a page, it follows links from that page to other sites. The spider will continue to crawl from one site to the next, which means the search engine’s index becomes more comprehensive with endless amounts of information.

2. Indexing the information that has been sourced.
Google has an index of 100 000 000 gigabytes (might actually be more by now) and that a LOT of data. On the pages that are indexed, Google will select pages or words which are relevant to the site, this is automated and determined by all kinds of metrics including how often a website is updated, what is the theme of the website etc.

3. Determining how the information should be ranked
Google uses a trademarked algorithm called PageRank, which assigns each Web page a relevancy score. A Web Page’s “PageRank” depends on the following (a) the frequency and location of specific keywords e.g. if a keyword only appears once, this webpage will get a low score for that keyword. (b) How long the web page has existed e.g. hundreds of new web pages are created daily and sadly some of them have a very short lifespan, Google places more value on a page that is active and has an established history. (c) How many other web pages link to your webpage
Well!! It seems that Google is a very, very busy search engine that is constantly looking for new information just to please me….and I am very grateful. My life without Google would be ‘informationless’, boring and unfathomable.

Google Quotes that ‘spoke’ to me:
Google is arguably one of the greatest inventions. The search engines is one of the greatest human inventions – Franklin Foer (I hear you Frankie……Google is the best!)
People at different stages of their lives are doing different things, and they all using Google – Susan Wojcicki (So true Susie, I would be lost without Google)
If it isn’t on Google then it does not exist – Jimmy Wales (Jim, I believe it!)

I found a new love in Google. I’m a Googler now – Alan Mulally (Al, you and me both, been in love with Google for a while now, I’m a Googler too!)

Sources:

Skill Crush
Quora
How Stuff Works
Brainy Quote

About Debbie Wessels

Juggling a energetic, full of surprises life, working full time with two teenagers and hoping to still be sane and normal by the time I retire.

Awesome Internet Facts

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Awesome Internet Facts

I’ve heard you love fun facts!

Well, here are some of the best! – I hope you will have as much fun reading through them and learning something new as I did while researching materials for this post.

1. A little over forty years ago the internet was invented in a beer garden. In fact, it was founded on August 27, 1976 on a picnic table at Rossotti’s (or Zott’s) Alpine Inn Bear Garden – who says the best ideas don’t come over a drink 😉

2. The name Google was created accidentally. A spelling error was made by the original founders who were under the impression they were going for Googol.

3. The first computer mouse was invented by Doug Engelbrecht and it was carved from wood First Computer Mouse

4. As of 1st January 2018, the total internet users across the world was 4,156,932,140 (that’s over 4 billion users). While the average internet speed across the globe is 5.6Mbps, in the USA it is 18.8Mbps.
The country with the fastest internet speed is South Korea with an average Internet speed of 26.7Mbps!


5. Google is the most popular website in the world. YouTube is second and Facebook is third.

6. The first tweet was sent on March 21, 2006 by Jack Dorsey:


7. Mark Zuckerberg’s original Facebook profile number ID is 4 – https://www.facebook.com/zuck – The first three Facebook accounts were for testing.

8. The first YouTube video was uploaded April 23, 2005. It’s called Me at the Zoo

9. The GIF format was invented by Steve Wilke, an engineer at Compuserve in 1987.

10. Today, the Internet is 10,753 days old. Check How old is the Internet

11. This is what Google looked like in 2004:


12. Google rents out Goats to help cut down the weeds and brush at Google HQ – Google Blogspot

13. The first smiley appeared in 1979, when Kevin McKenzie tried to express his emotions by electronic means. First it look like this -) Three years later, Scott Fahlman added a colon : -) and it took the form we are used to.

14. The first AOL Instant Message was sent by Ted Leonsis to his wife on Jan. 6, 1993. It read, “Don’t be scared … it is me. Love you and miss you.” His wife replied, “Wow … this is so cool!” Leonsis later became AOL’s Vice Chairman.

15. The first sentence uttered on Skype was in Estonian in April 2003 by a member of the development team. It was ‘Tere, kas sa kuuled mind?’ or “Hello, can you hear me?” in English.

16. The very first domain name registered was www.symbolics.com on the 15th March 1958.

17. Domain name registrations were free till 1995.

18. Anthony Greco was the first man ever arrested for sending spam messages in 2005.

19. The first picture ever uploaded on the web was posted by Tim Burners Lee (inventor of the World Wide Web) on behalf of a comedy band called Les Horrible Cernettes.


20. The world’s first website is still online – Info.cern

21. The first webcam was deployed at Cambridge University computer lab – its sole purpose to monitor a particular coffee maker and avoid wasted trips to an empty pot.

22. The Internet took just 4 years to reach its first 50 Million Users.

 

It’s amazing how little we know about something we use for more than 10 hours a day! – We’re just scraping the surface when it comes to incredible facts about the Internet, but now you can go and dazzle your friends with your new-found knowledge.

 

Do you know of any other fun and interesting facts about the Internet? If so, let us know about them in the comments!

 

Sources:
Life Hacks
Buzz Feed News
The Fact Site

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
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About Chantélle Naudé

I have been with Leads 2 Business for 9 years, working in the Leads 2 Quotes department. Mother to two beautiful daughters.

3D Concrete Printing

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3D Concrete Printing


Wow…so looking at pictures of 3D concrete printing, I was like:

Is this even possible…and yes, it is.
So let’s have a bit more of an in depth look at exactly what 3D Concrete Printing entails.

Definition: 3D Concrete Printing refers to various technologies that use 3D printing as a core method to fabricate buildings or construction components.


So basically, construction units such as walls or columns can be pre-fabricated off site by means of 3D printing. The completed wall parts will then be transported to the construction site, installed on traditional foundations and reinforced with traditional steel structures or cement. The unpolished walls can then be supplemented with different finishes.

There are numerous 3D printing methods used on a construction scale, which include the following main methods:

  • Extrusion (concrete, cement, wax, foam, and polymers),
  • Powder Bonding (polymer bond, reactive bond, sintering)
  • Additive Welding.

3D printing at a construction scale will have a wide variety of applications within the private, commercial, industrial and public sectors.

Advantages of these technologies include:
• Faster Construction
• Lower labour costs
• Increased complexity and/or accuracy
• Greater integration of function and less waste produced
• Could improve the quality of the end product
• Another advantage is the freedom of design, whereby buildings can be tailored to suit customer needs.

Demonstrations of these technologies have included fabrication of housing, construction components, bridges and civil infrastructure. This technology has increased in popularity in the recent years as new companies have emerged onto the market, such as Yingchuang Building Technique (Shanghai) Co. Ltd or Winsun as it is known. Their entry into 3D printing started in 2005, with the intervention of the spray nozzle, one of the main elements of its first 3D printer. The spray nozzle was used to experiment with cement and other materials. Winsun also set up the world’s biggest 3D construction printer, which is 10 metres wide, 6.6 metres high and 150 metres long…pretty awesome hey 
In 2013, Winsun successfully printed a batch of ten 3D residential houses, whereby they used a special ink made of cement, sand and fibre with a proprietary additive. Winsun has increased productivity and made it possible to save costs, a standard house can now be built for plus minus $30,000. Then the increase in the speed of construction is a huge factor as well, for example, the construction of a two-storey 1,100 sqm mansion took one day to print and two days to assemble…yes I know, incredible right!!

Winsun’s technology is also a lot more environmentally friendly. They source 50% of their ink material from construction waste and mining tailings.
The company’s most important showcase project was the company’s first 3D office. It opened in May 2016 in Dubai for the Dubai Future Foundation. The building was printed in Suzhou, cut into pieces for shipping and transported to Dubai. It was assembled and finished within a few weeks.

Now, the main challenge that faces 3D printing is the scepticism of designers, governments, project developers etc. For some it seems just too good to be true. Winsun then realised that they can win clients over by inviting them to their factory to view the prototypes with their own eyes. They are also collaborating with architects such as Cornell Design Institute, Tongji Design Institute and Jiaotong University to educate designers to incorporate the 3D-printed design into their work, as well as training architects with its textbook on 3D printing.
Below are a few amazing 3D buildings that have been built

Europe’s first residential 3D printed house
World’s first 3D hotel

And that is 3D concrete printing as I understand it and a bit of background into one of the world’s biggest 3D concrete printing companies, Winsun.

I hope your mind is as blown away as mine at the moment 😀

Now get cracking on your new 3D printing building.

Sources:
Lifegate
CNET
Wikipedia
Future of Construction

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.

About Bianca Horne

I started working at Leads 2 Business in May 2013 in the Africa Tenders Department. I worked my way to the Leads 2 Quotes Department in September 2016 and have been there ever since.

All you need to know about Drone Surveying

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All you need to know about Drone Surveying

SURVEYING
What is surveying?

Surveying refers to the detailed inspection of an object or area. It is commonly used to investigate infrastructure, developments or to assist with mining activities.
There are many different forms of surveying, infra-red, aerial photography and sensing tools just to name a few.
These methods can be very costly and time consuming and in today’s times we need to be fast and cost effective. Drones now allow us to save time and money.

DRONE SURVEYING
One of the more effective tools that allow you to obtain data a lot quicker and easier.

Today’s drone technology has many benefits.

  • Lower operational costs
  • Real-time reporting
  • Reliable data collection
  • A birds-eye-view of any terrain.

Here are a few ways drone surveying can save time and money, making any project more cost effective:

  • STOCKPILE SURVEYS
  • SLOPE MONITORING / DETECTION
  • TOPOGRAPHICAL SURVEYS

Now the question that everyone is asking…. What are the pros and cons of Drone Surveying??

THE PRO’s:

  • EASE OF DEPLOYMENT: Drones are able to complete survey projects in half the time of any traditional surveying method. Traditional surveying that took several weeks can now be done in a few short days, allowing projects to be done in less time.
  • REDUCED RISK: Drones are able to go into harsh and hazardous terrains, allowing better collection of any data in any environment.
  • DETAILED DATA: Drones are able to capture high-resolution images as they are equipped with imaging software which makes it easy to turn images into a wide variety of geo-referenced 2D maps and 3D models.
  • WILDLIFE: Leads 2 Business are very passionate about saving Rhinos. Drone surveying greatly assists in the fight against rhino poaching and the protection of the environment.

THE CONS:
There are some concerns when it comes to drone surveying.
Government can restrict drones to only fly in certain areas. There can be legal and financial implications for any persons that are found to be in violation.

Thus, in short, the Pros out way the Cons by far, as long as you have all your legalities in order!

 

Click here to watch Heart of a Ranger.

Sources
Airborne Drones
DC Geomatics
Planet In House
Grind Drone

To view more articles, please visit the Leads 2 Business Blog.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.

About Connie Flinders

I started working at L2B in April 2017 as an Accounts Executive. Not knowing too much about the construction industry. Learning new things every day and enjoying every second of it. Loving what I do!

Disastrous Demolitions and Dodgy Detonations…

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Disastrous Demolitions and Dodgy Detonations…

That old adage, ‘failing to plan, is planning to fail’ certainly has merit – but sometimes, no matter how well planned, things don’t go to plan.

You know how it goes… that coffee machine you installed, instructions so carefully followed, gurgles and empties it’s contents on the floor, your meticulously prepared presentation goes awry because of connection issues…
or the office printer keeps printing in a foreign language! “konnichiwhaaa..t?”

Things do go wrong, sometimes catastrophically… but there’s very little that’ll top a disastrous demolition.

Imagine watching your carefully laid plans fail and instead of a spectacular demolition, you're forced to stand by as the multi-story building topples over and starts rolling – towards another development!!

An 80-foot-tall factory building in Cankiri, Turkey topples over like a giant somersault instead of being demolished as expected.

 

 

Should I stay, or should I go…?

This 22-floor apartment building in Liuzhou, China was demolished to make room for a new real estate project in the city.

However, (who would have thought?) things didn't go exactly as planned.

Seconds after the initial blast, half of the building crashed to the ground as planned... but the other half remained standing, leaning ever so slightly to the side.

The second half has since been demolished with a crane.

 

 

 

 

 

Almost!

The Red Road flats – Glasgow City.
Built in the 1960’s the Red Road flats in Glasgow City were earmarked for demolition in 2015.

Two of the six buildings in Red Road estate remained standing after they proved too resilient for planned demolitions.

Disruptions were caused for about 2500 residents living in the exclusion zone, who then faced delays in returning to their homes.

The demolition contractors confirmed the remaining two blocks were stable and would be demolished using routine machine demolitions.

 

 

 

 

Say again?   Repeating in Russia.

Trying – and failing – to demolish a building in Crimea Sevastopol.

 In a botch job of bad exploding, demolitionists rigged a 16-story building in Sevastopol, Crimea to blow, and could only make it lean.

Undaunted, the demolition team set another charge and succeeded in a second failed attempt.

The building was left teetering at a 70-degree angle.

The crew responsible for the controlled demo blamed the presence of nearby civilians for the failure, saying the structure was too close to a residential area, and the team couldn't use quite as much BOOM as they'd wanted, whereas another report from RT.com, a worker stated the reason being reinforced concrete, claiming the building could withstand a 10-magnitude earthquake.
Ultimately, a third explosion finished the job.

Wow - talk about a bad day at the office!

Hello Google…?:

Opening  up a whole new keg of dynamite are home demolitions.

In this next scenario, they were following instructions… literally, to the book;

Coming a close second to worst-scenario demolitions is getting a call from your neighbor… to say your house is being demolished!

Turns out the demolition company was misdirected by Google Maps…

It’s not an easy job for a demolition company, demolition work is one the most dangerous jobs in construction, with the highest injury rates. It’s never an exact science and difficulties arise from various factors, one being older developments, where there’s not a lot of historical information on the building.

Structural principals of the building are key for planning a demolition, the type of structure, where the supports are based, what types of demolition to best use, etc.

Deconstructing a building and allowing the contents to be sold for recycling or removing fixed machinery are factors that need be taken into consideration. Added to this, explosions can be caused by accidental detonations, gas build up (especially in the case of plants) or leaks from pipes.

 

Yip, there’s lot’s that can go wrong with demolitions… should you ever need a demolition job done, make sure you use a reputable company, so you won’t feature in the host of ‘Demolition fail’ videos on YouTube!

Please visit the Leads 2 Business Blog for more information on demolition.
If you are interested in becoming one of our subscribers, please visit Leads 2 Business.
To view notes with screenshots on how to use our website, please visit the Leads 2 Business Wiki.
To view more articles, please visit the Leads 2 Business Blog.

 

About Lee Finch

I started my journey at Leads 2 Business in 2004 as an account executive. In 2006 I moved over to MAPRO (Marketing, Advertising and PRO), and in 2012 I became a Director. It’s exceptionally rewarding being a part of the Leads 2 Business team. I’m incredibly proud of the achievements and business ethos and I’ve always firmly believed we offer a valuable service, fine-tuned to our subscriber needs. I am a Mom of two beautiful children, a lover of human interaction, laughter and light, sprinkled with a generous dose of fun.

Demolition Techniques

Demolition Techniques
You may assume demolition is simply blowing things up. Some involve explosions but it is however way more technical than that. There are various demolition techniques that are considered as ‘demolition’.

 

It must be noted that before any demolition takes place the following practices need to be completed according to The Constructor

1. Surveying
2. Removal of hazardous materials
3. Preparation of plan
4. Safety measures

 

Taking the above into account the following (according to Civil Engineering News) are selected.

1. Non Engineering Demolition also known as Manual.

a) Refering to tools such as Sledge Hammers, Jack Hammers and Drillers which are used by workers.

Jackhammer - Demolition Techniques.jpg
Jackhammer Technique

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Engineering Demolition which is split into 3 categories.

a) Mechanical Method:

Wrecking Ball (think Miley Cyrus but without the theatrics)

Pusher Arm technique (a specialised hydraulic arm used for smaller buildings)

Thermic Lance Technique (using flaming temperatures of 2500 0C to melt reinforcement)

Non-Explosive (drilling and filling with expanding slurry)

Concrete Sawing

Deliberate Collapse (significant structural items are removed)

Pressure Jetting (thanks to H20)

 

b) Implosion: Inward disintegration using explosives

c) Deconstruction: Non-structural and structural

Wrecking Ball - Demolition Techniques.jpg
Wrecking Ball Technique

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Demolition encompasses many techniques and is often used in conjunction with new construction or renovation.

In conclusion, I’ll take inspiration from Rumi, ‘In this life many demolitions are actually renovations.’

 

If you are interested in becoming one of our subscribers, please visit Leads 2 Business for more information on demolition tenders.
To view notes with screenshots on how to use our website, please visit our Wiki site.
To view more articles, please visit our blog.

 

 

 

About Sasha Anderson

I enjoy making new professional acquaintances and corresponding with existing clients. Reach out if you want to talk, L2B, social media, construction, technology, shoes, dachshunds, popular culture or travel.

Tips for Blasting

Tips for Blasting
Blasting

Firstly we need to know what blasting is. It is a technically controlled, effective and safe way to break rock for excavation. It is primarily used in Civil Engineering, Mining and Quarrying for roads and dam construction.

What explosives are used for blasting?

It is a common misconception that dynamite or gunpowder are used for most blasting activities but it is rather the engineered blasting agents that account for approximately 90% of explosive material used.
Ammonium Nitrate mixed with either sodium nitrate or calcium nitrate is the most common product and pound for pound the more effective explosive.

 

What is involved in Blasting?

• Holes are drilled into the rock and filled with explosives. The more solid the rock the more explosives will be needed.
• Proper ventilation is required to remove not only the dust but also the combustion gases from the explosion. This needs to be done before work can be resumed.
• The rock then collapses once detonation takes place.
• The debris is removed and if need be reinforcing is put in place before further work takes place.
• The entire blast lasts up to 1 second.

Blasting

Steps to be considered before blasting takes place:

• Fragmentation desired – take into consideration size of digging equipment and crushing equipment needed on the project.
• Rock quality/character – state of the area being blasted, is the rock hard or soft and is the area dry or wet.
• Site limitations – is the area to be blasted near other structures or properties.
• Safety limitations – are there any electrical hazards
• Equipment limitations – are all equipment needed for the project available

 

Random facts about blasting

• Blasting is now considered routine work in the mining industry.
• Geological or Geotechnical knowledge is needed to ensure effectiveness and safety.
• Blasting involves design and patterns, not just “blowing” stuff up…
• The result of rock blasting is often called rock cut.
• Mining and Construction are the 2 most common uses for explosives.

Blasting

 

Sources:
www.wikipedia.org/wiki
www.railsystem.net
www.miningandblasting.wordpress.com

 

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About Karen Garner-Savory

I started working at Leads 2 Business in May 2009, and have served as Head of Department of Telesales and Administration from 2010 until the present. I oversee both the Telesales department as well as the Administration of our Johannesburg Office.

Unusual Finds During Demolition, Excavation and Renovation

Unusual Finds During Demolition, Excavation and Renovation

Unusual Finds During Demolition, Excavation and Renovation

1. An entire Mosque discovered in apartment during renovations:
Palermo, Italy. When the owners of the apartment in Via Porta di Castro bought the apartment, they started with renovations. They intended to knock down a wall to open the area, but discovered that the plaster was wet and when they cleaned the wet area, they found Arabic writing. The writing covered all four walls and the inscriptions are in gold and silver. The couple have left the mosque as they found it, not wanting to destroy history.
Unusual Finds During Demolition, Excavation and Renovation
2. £50k jackpot in rare tiles found by demolition man:
Southbourne, Dorset. When Stephen Malton was contracted to tear down the home of Victorian artist, Arthur Bell, he never expected to find a fortune in Delft tiles. Due to the eagle eye of his foreman, the tiles were saved from destruction as he stopped the team while they were pulling down a wall behind the fireplace, where the tiles were hidden. Due to a clause in his contract, Stephen has the right to keep any treasure found during the demolition process. This find is estimated to bring him £50 000.
Unusual Finds During Demolition, Excavation and Renovation
3. Letter To Santa Claus From 1943 Found In A Chimney:
United Kingdom. A young boy’s letter to Santa was discovered during the demolition of the chimney of a 1930’s house. The letter asked simply for a Rupert Annual, slippers, a silk tie, a pencil box, chalk, soldiers and Indians. Lewis Shaw, the builder whose crew discovered the letter, decided to find the author of the letter and make his wishes come true. He connected with David Haylock (who wrote the letter when he was six), and David was very excited to receive his Christmas wish from 1943.
Unusual Finds During Demolition, Excavation and Renovation
4. Bethel Church (1905) demolition leads to time capsule extraction:
Chicago, Illinois. During the demolition of the Ingleside Community Church of the Nazarene, extra care was taken during the removal of a cornerstone column. A time capsule was extracted and opened – a Tetley tea tin, containing religious documentation in Danish (or possibly Norwegian) and two U.S. pennies from 1899 and 1901. It is believed the capsule was added to the cornerstone by L.A. Larson, the presiding elder and person who built the church.
5. A Mysterious Discovery halts Demolition of House:
Middletown, Pennsylvania. A hidden room and tunnel were discovered after a crew knocked out a wall during the demolition of a home. The local historical society visited the site due to the age of the building. They advised that it might have been part of the Underground Railroad and used as a speakeasy during Prohibition.
6. Pictures taken of “Mannequin” by Demolition Crew, only to discover it is a dead body:
Merriam, Kansas. The disturbing discovery of a dead body was made by a demolition crew when a load of trash was picked up to move. Initially they thought it was a mannequin and started taking photos, while laughing. Then, the stench got to them and they called 911. Demolition was halted while investigators determined whether it was a homicide.
7. Convent Rubble Yields Priceless Relic:
Christchurch, New Zealand. A large antique safe concealed at the back of the altar of the under-deconstruction Nazareth House convent in Christchurch was found by Paul King, Graceworks Demolition and Recycling boss, while he was working in the chapel. The caretaker managed to find a key that fit the lock and when they opened the safe, they discovered a sacred ceremonial monstrance. Paul returned the monstrance to the nuns who had been living there at the time of the earthquake and they were overjoyed.
8. Stripping of Cottage Wall leads to Discovery of 400-year-old Mummified Cat:
Devon, United Kingdom. A mummified cat was discovered when builders stripped a wall in the bathroom of a house in Ugborough. It is believed that years ago, cats were put behind walls to ward off evil spirits and witches. Richard Parson, the owner of the house, has indicated that the cat will be placed back in the wall after the renovations are complete.
9. Demolition of Abandoned home leads to Surprising Treasure:
Saint Cloud, Florida. During the demolition of a dilapidated home that had been abandoned by the owner(s), silver coins started pouring out of the windows of the house. The coins were gathered up by the crew and they found that there were 202 dimes, a few nickels, over a thousand quarters and 861 half-dollars. These coins had been hidden in the walls of the house in jars and the oldest coin was dated to 1917. The coins were handed to the city of Saint Cloud.
10. Treasure Hidden in Cooler Box:
Johannesburg, South Africa. While digging up a six meter trench for a drainage system near a building in 10th Avenue, Rodgers Nkuna discovered a mud-spattered blue and white cooler box. The police were notified and when they opened it, they discovered R20 and R50 notes, estimated to a value of R1.5 million. It is unknown how long the cooler box had been buried there.

 

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To view notes with screenshots on how to use our website, please visit our Wiki site.
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Sources:
HTTP://WWW.ANSAMED.INFO/ANSAMED/EN/NEWS/SECTIONS/CULTURE/2013/08/27/PALERMO-MOSQUE-DISCOVERED-DURING-HOME-RENOVATIONS_9205871.HTML
http://www.dailymail.co.uk/news/article-3246619/Demolition-man-unearths-50-000-rare-tiles-hidden-fireplace-called-knock-artist-s-house.html
https://www.yahoo.com/news/letter-to-santa-found-in-chimney-wall-fulfilled-72-184511409.html
https://www.today.com/news/78-year-old-man-reunited-santa-letter-he-wrote-boy-t61511
HTTPS://WWW.URBANREMAINSCHICAGO.COM/NEWS-AND-EVENTS/2018/02/02/UNUSUAL-TIME-CAPSULE-EXTRACTED-FROM-BETHEL-CHURCH-DURING-BUILDINGS-DEMOLITION/
https://www.theblaze.com/news/2014/05/27/a-construction-crew-demolishing-a-home-was-forced-to-stop-after-a-very-mysterious-discovery

Demolition crew takes pictures of “mannequin” only to find it is a dead body

http://www.stuff.co.nz/the-press/news/christchurch-earthquake-2011/8113672/Priceless-relic-found-in-convent-rubble
https://www.telegraph.co.uk/news/newstopics/howaboutthat/5200089/400-year-old-mummified-cat-found-in-walls-of-cottage.html
http://yournationnews.com/construction-workers-find-surprising-treasure-during-demolition-of-abandoned-home/
https://www.iol.co.za/news/south-africa/mud-covered-treasure-box-found-in-edenvale-436810

Photo Credits:
Mosque, Palermo, Italy – Photo by Franco Lannino
Bethel Church, Chicago – Photo by Eric J. Nordstrom

 

 

About Cecile Van Deventer

I joined the L2Q Team in 2006, as a L2Q Support Assistant and have been the HOD since 2010. I supervise L2Q Bills, Daily Tender Bills, Control Lists and Directory.

Demolition 101 – Facts & Misconceptions

posted in: Did You Know | 2

Demolition 101 – Facts & Misconceptions

Demolition 101

Demolition for me has always sounded like one of the coolest jobs!!!
Being allowed to blow up things every day…that must be great for treating anxiety.
However, I have come to learn that it isn’t all excitement and explosions and is a rather intricate business. So, I thought I would find out what the biggest myths about demolition are:

Demolition 101

1. Demolition is just blowing up buildings – In fact implosions only account for less than 1% of all demolitions

2. Demolition is bad for the environment – The truth is the contrary. Demolition contractors remove harmful materials and toxins from old buildings in order to dispose of them correctly i.e. Asbestos. They clean up hazardous substances and are in fact Environmental Superheroes.

4. Demolition contractors destroy historical buildings that should be protected – In fact demolition contractors can assist in restoring these buildings by removing the harmful materials and making way for energy efficient upgrades to these buildings.

5. Demolition overcrowds land fill sites with debris and waste products – Demolition has actually been one of the most “Green” practices before it was fashionable. Contractors will salvage as much as possible from an old building for reuse or recycling where possible.

6. Demolition is expensive – Demolition only accounts for a tiny fraction of an entire project. Averaging somewhere around 2% of replacing a building.

 

Demolition 101

So, you will see that Demolition is in fact a vital, environmentally necessary and an extremely dangerous job which is often underrated by most. When they do get to implode buildings, it requires intense planning as the safety of their workers, the public in close proximity as well as the surrounding buildings are safe.

They often work in some of the least safe conditions in buildings that have been condemned yet some people might not initially see the point of hiring a demolition contractor…how hard can it be right? Its not as easy as some may perceive, get the experts in! This is a serious business, hiring the right people for the job can save you by having the job done right and taking the necessary precautions.

They can guide you at the beginning of the project of everything that is required before you start, you don’t want to be held liable for damage to others property or the surroundings.

 

Sources:
https://www.quora.com/Why-do-we-hire-a-demolition-contractor
http://www.demolition.com

If you are interested in becoming one of our subscribers, please visit our website.
To view notes with screenshots on how to use our website, please visit our Wiki site.
To view more articles, please visit our blog.

About Joanne Couto

I started with Leads 2 Business in April of 2013 as an Account Executive, was promoted in 2016 to Senior Account Executive, and then in March 2017, I became the Client Liaison Officer, where I now specialise in client retention and assisting the Sales Team in this regard. I believe whole heartedly in the service that we provide, knowledge is king!

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