| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a shrinkage reducing agent for blast furnace cement, which exhibits an excellent function of reducing shrinkage to blast furnace cement and consequently can allow the hardened concrete obtained from the blast furnace cement to be restrained from being cracked and have excellent freeze-thaw resistance and improved durability. <P>SOLUTION: The shrinkage reducing agent for blast furnace cement includes, as a main component, a polyoxyalkylene compound (A) shown by general formula: R<SP>1</SP>-[O-(A<SP>1</SP>O)<SB>m</SB>-R<SP>2</SP>]<SB>n</SB>(wherein R<SP>1</SP>is the R<SP>1</SP>derived from polyhydric alcohol shown by R<SP>1</SP>-[OH]<SB>n</SB>; n is an integer of≥3; A<SP>1</SP>O is a 2C-8C oxyalkylene group; R<SP>2</SP>is a hydrogen atom or a 1C-30C hydrocarbon group; m is the average added molar number of the oxyalkylene group (A<SP>1</SP>O) and is 10-1,000). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
