PRODUCTION OF LIGHTWEIGHT FOAM CONCRETE USING EXPANSIVE LIGHTWEIGHT AGGREGATE FOR MANUFACTURE OF NONFLAMMABLE SANDWICH PANEL

摘要

PURPOSE: Sandwich panels, substituted for the conventional expanded styrene foam, for outer and inner walls of construction are provided, which has nonflammability, no emission of toxic gas and heat insulation by using lightweight foam concrete and expansive lightweight aggregate. CONSTITUTION: The lightweight foam concrete is produced by the following steps of: foaming a mixed liquid obtained by mixing lauryl alkyl ether sulfate-based synthetic foaming agent diluted 40times by water with liquid admixture containing calcium nitrite more than 45pts.wt. and aluminum sulfate more than 5pts.wt as main components under air pressure of 8-10atm; preparing cement slurry containing aggregate by adding 70-85L of lightweight aggregate, vermiculite, to cement slurry(240-320kg cement + 96-192L water) and mixing thoroughly; stirring the mixture slowly and adding 650-800L of prepared foam; pouring the mixture to a mold; curing for 24-48hrs.