Cast stone has been used as a building material for hundreds of year date back to France and widely used through Europe. In America, cast stone gained acceptance in construction in 1920. Cast stone is manufactured to simulate natural cut stone. With a fine-grained surface and texture, it provides a superior alternative to natural cut stone because the manufacturing process is controlled to meet the strength and weathering requirement as set forth by ASTM. The engineering properties of cast stone can be tested precisely in the lab setting. As a result, the durability of cast is more predictable than the natural stone that is carved from a quarry.
Standard Specifications
For standard architectural precast specification please MasterSpec034500ArchitecturalPrecast2012
For standard architectural cast stone specification please click MasterSpec047200CastStone2011
How Vibrant Dry Tamped Cast Stone is made?
The “Vibrant Dry Tamped” (VDT) method of making cast stone is to use the pneumatic ramming hammers to consolidate the earth moist, zero-slump concrete against a rigid mold in layers. The unit is then immediately removed from the mold. The unit is then hand tooled at edges to enhance the arris finish. The cast stone unit is then placed in the curing chamber in which the live steam is supplied to cure the products.
The mold can be used again immediately after the unit is stripped from the mold. This practice increases the economy of mold using and production efficiency. Usually, the mold can be reused several times before it needs to be re-surfaced.
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