DRYING SHRINKAGE-REDUCING AGENT AND CEMENT HARDENED PRODUCT USING IT

Title:

DRYING SHRINKAGE-REDUCING AGENT AND CEMENT HARDENED PRODUCT USING IT

Document Type and Number:

Japanese Patent JP2007210842

Kind Code:

A

Abstract:

To provide a drying shrinkage-reducing agent which can reduce drying shrinkage and hardening shrinkage, and by which strength development is improved and high cracking resistance is obtained as well as neutralization of a cement hardened product can be suppressed, and to provide a cement hardened product using it.

The drying shrinkage-reducing agent contains 10-90 mass% of component A expressed by general formula (1) and 10-90 mass% of component B expressed by general formula (2), and the cement hardened product is obtained by mixing the drying shrinkage-reducing agent. Wherein general formula (1) is HO-ä(AO)a(C2H4O)b}-H (wherein, AO is a 3 and/or 4C oxyalkylene group, a and b satisfy 1≤a, 1≤b, 2≤(a+b)≤30 and 0.4≤a/b, respectively, and (AO) and (C2H4O) may be a random addition product or a block addition product). General formula (2) is RO-(A'O)n-H (wherein, R is a 2-8C alkyl group, A'O is 2 and/or 3C oxyalkylene group, and n is 1-10).

Inventors:

KIDA TSUTOMU
SUHARA KENTARO
SHIMADA SUKETOMI
MATSUI TATSUYA

Application Number:

JP2006033246A

Publication Date:

August 23, 2007

Filing Date:

February 10, 2006

Export Citation:

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Assignee:

DENKI KAGAKU KOGYO KK
NOF CORP

International Classes:

C04B24/32; C04B28/02; C08L71/02; C04B111/34

Attorney, Agent or Firm:

Satoru Matsumoto

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