Roman Concrete - How They Did It
This does not have much to do with casting concrete in molds or forms, but it is interesting.
I wondered just how long concrete had been around after reading an article that claims that the pyramids are made of concrete blocks. http://www.geopolymer.org/science_archaeology/pyramids_egypt/index.html - if you want to see it. It looked interesting so I looked up Roman concrete.
They where known to be using concrete and molds 2000 years ago. The cement part was the same as today. The difference was the way it was obtained. Modern cement is made from limestone in cement plants. It is crushed and ground to a fine powder, and cooked at very high temperatures. In Roman times they
...or a ball. The puck is made of hard, vulcanized rubber and is made in regulation sizes; balls are made of plastic. Both cost about $5 each. Goal nets are supported by steel frames with nylon nets and can be ...
This was mixed with sand in as dry a mix as possible on site and placed over layers of rock that had been pre set. Then they pounded the concrete mix into the rocks until the spaces between the rocks where filled with the mix. Then another layer of rocks, more concrete mix, etc. Until the thickness that was wanted was reached. It was a good system, the Pantheon is still there in Rome along with a lot of other buildings made this way over 2000 years ago.
Around 1980 or so this method was “rediscovered” and is often used now.
...in one area then move to another area. Usually, these dispensers are used to pour sidewalks and other projects that need concrete batched into several areas. You are able to control the amount of concrete that is needed in one ...
Some of their buildings used clay bricks in the concrete and some had bronze where we would have rebar. This was not a common practice,
...Innovative You may even use design ideas you find around your home. For example, you could use an Indonesian batik design block. As long as it can make an impression on wet cement, and does not stick to the finished ...
I wonder if some off our modern buildings will be around in 2000 years? Probably not. The Pantheon will be 4000 years old then, but probably be starting to show its age.
For more on this search for “roller compacted concrete”. Here is a link to a dam in CA. http://www.cncpc.org/pages/media.html Those of you that live downstream from a dam may be particularly interested.
copyright 2005 Delmar Germyn
http://www.delsmolds.com
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Articles on how to mix your concrete, hypertufa, etc for different
...the real product, yet if properly installed, it is difficult to see the difference. One of the biggest advantages to a stamped concrete slab is its stability. Where individually laid flagstone, bricks, and pavers have a tendency to shift and ...
Free information on how to make your own molds. Tips and hints on their use and care.
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...elements of the weather may erode the concrete, reducing its strength greatly. Concrete coating is beneficial to homeowners and construction workers alike because it protects concrete from such structural problems. Where should you use concrete coating? If you have never ...
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