QUICK-HARDENING CELLULAR MORTAR
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 ce...
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Zusammenfassung: | 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 =0.5 kgf/cm compressive strength after 6 hr, =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. |
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