| abstract |
(57) [Summary] [Purpose] Reduction of dust in shotcrete. A method for improving rebound characteristics of shotcrete, which comprises water, alkanolamine, polyol, concrete additive, alkanolamine, A method comprising the inclusion therein of microsilica powder pretreated with a liquid selected from an aqueous solution of at least one substance selected from polyols and water-soluble cellulose compounds in a proportion of 2 to 25% by weight thereof. |