Dust reduction agent and shotcrete

摘要

PPROBLEM TO BE SOLVED: To provide a dust reducing agent for blasting process with which the occurrence of dust originating from concrete in blasting is decreased even in the small addition to the shotcrete and the shotcrete employing the dust reducing agent. PSOLUTION: The dust reducing agent for the blasting process contains 70-100 wt.% water-soluble cellulose ether having 55,000-100,000 Pa×s viscosity in 2 wt.% aqueous solution at 20°C, 0 to 30 wt.% polycarboxylic acid-based polymer and 0-10 wt.% defoaming agent. PCOPYRIGHT: (C)2005,JPO&NCIPI