| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a low-shrinkage mortar composition not only capable of remarkably reducing drying-shrinkage but also capable of having an excellent neutralization inhibition effect and thus capable of improving a low temperature property even without using a setting accelerator in combination. <P>SOLUTION: The low-shrinkage mortar composition comprises an alumina cement, an aggregate, an expanding material and a drying-shrinkage reducing agent consisting of 10-90 mass% of component A expressed by the general formula (1): HO ä(AO)<SB>a</SB>(C<SB>2</SB>H<SB>4</SB>O)<SB>b</SB>}-H [wherein, AO is a 3C and/or 4C oxyalkylene group, a and b satisfy 1≤a and 1≤b, 2≤(a+b)≤30 and 0.4≤a/b, respectively, and which may be a random addition product or a block addition product] and 10-90 mass% of component B expressed by the general formula (2): R' O(A'O)<SB>n'</SB>-H [wherein, R' is a 2-8C alkyl group, A'O is a 2C and/or 3C oxyalkylene group and n' is 1-10]. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
