| 摘要 |
PROBLEM TO BE SOLVED: To reduce the work man-hours at a site by mixing the materials other than water in advance, and kneading the mixture with water to manufacture the PC grout at the execution site. SOLUTION: The materials other than water are mixed to prepare a premixed material. In the premixed material, limestone powder is used as an inorganic filler, normal Portland cement is used as cement, and a thickener mainly made of sodium pyrophosphate and an acrylic polymer compound and a high-performance water reducing agent mainly made of naphthalene sulfonic acid are used as a delay agent. The premixed material and water are put in a universal stirrer and kneaded to prepare the PC grout. |
