| 摘要 |
PROBLEM TO BE SOLVED: To provide an injection joint sealant for pavement which has basic performances as a joint sealant and which is not extruded to a paved surface even if compressed due to the expansion of the pavement. SOLUTION: This air-milk cement joint sealant contains a 4-55 mass% very high-speed hardening cement, a 9-83 mass% calcium carbonate powder, 0.01-1 mass% foaming agent, and 10-45 mass% water. The joint sealant can maintain the shape as a joint when injected into the gap for joint and hardened, and forms a foam mortar which is easily collapsible by compression. The foam mortar is collapsed when subjected to a compression due to the expansion of the pavement, and absorbs the expansion when pulverized. Since the foam mortar is gradually collapsed into powder and falls on a road bed thereunder, it does not extrude to the paved surface. COPYRIGHT: (C)2010,JPO&INPIT
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