| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a filler having high fluidity even when fly ash is added. <P>SOLUTION: The filler is obtained by blending, by mass based on cement of 1, bentonite of 0.096-0.24 as a water holding agent, metal powder of 0.00025-0.001 as a foaming agent, lignin sulfonate of 0.002-0.01 as a fluidizing agent and sodium silicate of 0.005-0.015 as a hardening accelerating agent. The filler is filled between the tubes of a double tube structure as filler. In such a case, the water holding agent, the fluidizing agent, a hardening accelerating agent and the foaming agent are made powdery and are pre-mixed to make a fluidizing material a<SB>1</SB>, and a mixture a<SB>2</SB>of the fluidizing material a<SB>1</SB>with water (w) is mixed with a mixture a3 of cement (s), in which the fly ash is added, with water and stirred to make the filler. The incorporation of the hardening agent accelerates the hardening of the filler and then, even when the fly ash is added in the filler, the delay of the hardening hardly occurs and the increase of bleeding and the reduction of the volume hardly occur. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
