| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an autogenous shrinkage reducing agent which is made to be added to a hydraulic material composition to reduce autogenous shrinkage of the composition effectively. <P>SOLUTION: The autogenous shrinkage reducing agent indispensably includes: polyethylene glycol (A) of a range of a weight average molecular weight of 400-8,000; and a pH adjuster (H), makes the polyethylene glycol (A) a principal component, and includes the pH adjuster (H) by a mass ratio of a solid content conversion with the polyethylene glycol (A) of the pH adjuster (H)/the polyethylene glycol (A)=1/50 to 1/one million. <P>COPYRIGHT: (C)2012,JPO&INPIT |
