CONSTRUCTION METHOD OF FOAM CONCRETE MORTAR COMPRISING PHOSPHOGYPSUM, GRANITE POWDER AND WASTE SLAKED LIME(Ca(OH)2), WITH INCOMBUSTIBILITY, HEAT INSULATION, AND SOUND ABSORPTION AND INSULATION

摘要

PURPOSE: Provided is a construction method of foam concrete mortar with incombustibility, heat insulation, and sound absorption and insulation by using phosphogypsum, granite powder and waste slaked lime as main materials. CONSTITUTION: The foam concrete mortar composition is prepared by dry-mixing main materials, 30-70wt.% of phosphogypsum, 30-70wt.% of granite powder and 30-70wt.% of waste slaked lime(Ca(OH)2) and auxiliary materials. The phosphogypsum, generated after fertilizer production, is thermal treated at 150-800deg.C for remove moisture and small amounts of pollutants, and granite powder and waste Ca(OH)2 are dried at 200-300deg.C for use as main materials. The auxiliary materials comprise 20-40wt.% of cement, 2-10wt.% of yellow earth, kaolin or feldspar, 0.01-0.5wt.% of foaming material, 0.01-0.5wt.% of foaming material such as Al2O3 or Zn, 2-5wt.% of foaming catalysts such as CaO and carbonate, 0.01-5wt.% of separation inhibitor such as methyl cellulose, wood powder or rice hull, 0.5-3wt.% of concrete strength-reinforcing material, and 3-15wt.% of tensile strength-reinforcing material such as sepiolite. The resultant mortar applied to walls and between floors is easily constructed by mixing with 50-85wt.%(based on the mortar) of water, forming foams for 20-50min and dry-curing.