| 摘要 |
PURPOSE: To obtain a low-heat resistant back-filling material for burying underground cable, having excellent self-filling properties, sufficiently filling gaps even in a large number of pipe lines, providing low-heat resistance, having economic efficiency, capable of preventing occurrence of consolidation settlement after back-filling. CONSTITUTION: This low-heat resistant back-filling material for burying underground cable is obtained by blending a powdery or granular material containing dolomite or a dolomite-based mineral with a fluidizing agent. The amount of the powdery or granular material contains preferably >=20wt.% dolomite- based mineral. The amount of the fluidizing agent such as a naphthalenesulfonic acid formalin high condensate, a polyol complex, an oxycarboxylate or a hydroxycarboxylate to be added is preferably about 0.01-1.0wt.% based on the powdery or granular material. |
