Roman Concrete - How They Did It
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Article by: Delmar Germyn This does not have much to do with casting concrete , Barefoot at the Cottage in molds or forms, but it is interesting. I wondered just how long concrete , Insect Spray Warnings and Healthy Alternatives had been around after reading an article that claims that the pyramids are made of concrete , Abatement Considerations and Common Sense 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. , Fountains of Refreshment They where known to be using concrete , Garden Swings Create an Enchanted Garden Setting 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. , Daphnes for Scent and Colour It is crushed and ground to a fine powder, and cooked at very high temperatures. , Hydroponic Plant Systems - What, No Dirt? In Roman times they used volcanic ash (composed of silica and some aluminum and iron oxide) and lime. This was mixed with sand , Pest Control and Mosquito Larva 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 , Bonsai Plant Care: What You Need to Know mix into the rocks until the spaces between the rocks where filled with the mix. Then another layer of rocks, more concrete , Natural Pond Filters - Let Nature Do the Hard Work! 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 , Winterberry Holly 'Winter Red' made this way over 2000 years ago. Around 1980 or so this method was "rediscovered" and is often used now. With modern equipment such as mobile vibrators and vibratory rollers it is used to make Dams, airport runways, and in other places , Garden Statuary - Time for a Fresh New Look where strong concrete , Basil: The King of Herbs is needed. This is stronger than poured concrete , Names Of Spring Flowers because there are less voids. Voids cause weakness. It is also cheaper because no rebar is used. some say it is environmentally , Fountains of Refreshment friendly, -less steel, less water , Making a Splash with Features in the Garden and runoff, and less cement. In modern poured concrete , Introduction to Snow Blowers the voids are compensated for with rebar. The romans did not have steel, and their concert didn't need it! Some of their buildings , Why Teak Coffee Tables Are Essential For Your Outdoor Space used clay bricks in the concrete , Plant A Simple Tea Garden and some had bronze where we would have rebar. This was not a common practice, but was used on roofs , How To Use Feng Shui Oustside Your Home and arches. I wonder if some off our modern buildings , Hydroponics Gardening - An Introduction To Hydroponics Gardening For Beginners (Part 15) Ozone 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  My web , Annuals For Shade site is setup to help you and I learn more about molds and casting in general. YOU WILL FIND.... Articles on how to , Barefoot at the Cottage mix your concrete, , Why Teak Coffee Tables Are Essential For Your Outdoor Space hypertufa, etc for different uses. Free information , Teak Outdoor Benches- Fantastic Seating for Your Patio and Garden on how to , Barefoot at the Cottage make your own molds. Tips , Let The Season Come Alive: Enjoy The Outdoors With Great Patio Furniture For Your Home and hints on their use and care. Free information , Insect Spray Warnings and Healthy Alternatives on making and using various types of molds to cast concrete, , Recipes for and Hypertufa plaster, cement, ceramics, and molding with hypertufa. Suggestions for projects that you can do in a couple of hours that will make your yard , Artificial Trees Advantages / garden , Choosing Healthy Plants for Your look great. All the information , Benefits of Mulch on the site is free to use and share. Click here to go to my site now. http://www.delsmolds.com I am hoping that when you see what I have (or have not) set out you will send in your tips , Why Teak Coffee Tables Are Essential For Your Outdoor Space and stories. By sharing we can all learn from each other. We can also help newcomers to the hobby / business. The site will be constantly added to as time passes, so please click for updates |
  
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