Pouring Pre-Stressed Concrete...
I used to enjoy mixing up Portland Type II in a wheel barrow...
Another trick is to build your "reinforcement matrix FIRST- It must be a self supporting structure. Keep in mind though, that a self supporting structure can be built out of silk thread- if its...
Great materials "displacement" table.
http://www.pembroketrading.com/conversiontables.htm
Bob
PS- Read some good manuals on the art/science of "Rigging"- especially House Moving, unusually shaped cargo, cables, chainers, binders, nylon straps, shrink wrapping, the way to use a boom hoist-...
I think I recall it has to do with "displacement".
Lord Brunel- built the first iron/steel ship, the "Great Eastern", ca 1854, "Displacement", maybe 200 Tons of Steel and Iron.
I recall skimming through something, the trick has to do with this- the weight of the building material has to be...
A very fascinating concrete subject is the "Mulberry"- essentially floating docks for Allied supply ships during the invasion of Normandy in 1944.
Constructed out of a huge concrete casting "tub" they were solidly filled in with "ballast"- the non flamable, non organic debris (concrete, brick...