Low shrinkage, high strength cellular lightweight concrete

Details Low shrinkage, high strength cellular lightweight concrete Low shrinkage, high strength cellular lightweight concrete

C - Chemistry, Metallurgy

04

B

C04B 28/04 (2006.01) C04B 14/38 (2006.01) C04B 18/02 (2006.01)

Patent

CA 2416493

An economical structural cellular lightweight concrete with a density of from about 45 lb/ft3 to about 90 lb/ft3 and a strength from about 1,000 psi to about 6,000 psi after 28 days of curing at room temperature and with minimal shrinkage on drying, is described. The concrete comprises cement, lightweight aggregate with a density from about 25 lb/ft3 to about 60 lb/ft3, fiber, superplastizer, gas and/or foaming agents, and a shrinkage reducing agent. The concrete can be manufactured using facilities for conventional concrete even with a portion of Portland cement replaced by industrial by-products or recycled materials such as blast furnace slag, coal fly ash and recycled glasses. The preferred procedure for making the lightweight concrete is also described. The products made with the lightweight concrete have much better ductility and construction capabilities than conventional concrete products.

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