CEMENT MIXTURE CONTAINING DEMOLISHED CONCRETE DEBRIS

摘要

PPROBLEM TO BE SOLVED: To provide a cement mixture which is capable of being used as a solidifying material for constructing or refilling the ground relating to the foundations of a structure and which, even when it contains a relatively large amount of demolished concrete debris of an unadjusted particle size distribution, is easy to administer compressive strength and fluidity and stable in workability and quality and to provide a method for producing the same. PSOLUTION: The cement mixture contains at least demolished concrete debris, water, swellable bentonite, and cement. The method for producing the cement mixture comprises step 1 of forming bentonite water containing swollen bentonite by mixing water with swellable bentonite, leaving the mixture for a definite time, step 2 of forming a cement bentonite slurry by mixing the bentonite water formed in step 1 with water, and step 3 of mixing the cement bentonite slurry formed in step 2 with demolished concrete debris lumps crushed to a specified or smaller particle diameter. PCOPYRIGHT: (C)2009,JPO&INPIT