QUICK-HARDENING CELLULAR MORTAR

摘要

PROBLEM TO BE SOLVED: To ensure an excellent quick-hardening property and to facilitate demolition and re-excavation by adding gypsum to a fired body of incineration ash contg. aluminates and calcium silicate and specifying mass per unit volume, compressive strength and flow value. SOLUTION: This cellular mortar has <=1.5 kg/m<3> mass per unit volume, >=0.5 kgf/cm<2> compressive strength after 6 hr, <=30 kgf/cm<2> compressive strength after 28 days and >=150 mm flow value. The mortar is obtd. using cement comprising a hydraulic compsn. obtd. by adding gypsum to a calcined body of incineration ash of municipal garbage and/or incineration ash of sewage sludge. The calcined body contains 10-40 wt.% one or more aluminates selected from calcium chloroaluminate, calcium fluoroaluminate and calcium aluminate and calcium silicate and preferably contains a certain amt. of activated calcium aluminate.