| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an admixture for a spray material, which can give a spray cement concrete capable of giving a set product with improved freeze thaw resistance and proof against slip along a slope after being sprayed, to provide a spray material, and to provide a cement concrete spray work using the same. <P>SOLUTION: The admixture comprises organic hollow microparticles and an accelerator. In one embodiment of the admixture, the organic hollow microparticles are based on a (co)polymer comprising at least one of acrylonitrile, vinylidene chloride, methyl methacrylate, and methacrylonitrile. The spray material comprises the admixture, cement, and an aggregate. The spray work comprises pumping and spraying the spray material. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
