Patent ID: 8070876

Claim:
A thermal energy storage foamed cementitious composition, comprising: (a) a cementitious binder mixture of calcined gypsum and hydraulic cement, in an amount of about 30-80 wt %; (b) a phase change material, in an amount of up to about 30 wt %; (c) lightweight aggregates, in an amount of about 0.5-30 wt %; (d) a polymer latex, in an amount of about 0.5-15 wt %; and (e) a foaming solution, in an amount of about 0.5-25 wt %, wherein said foaming solution comprises about 0.05-10 wt. % of a foaming agent selected from the group consisting of polyoxyethylene alkyl ether, alkanol sulfate and protein, and about 0.02-1.5 wt. % of said polymer latex.