Title:
ADMIXTURE FOR CEMENT MORTAR
Document Type and Number:
Japanese Patent JP3865535
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To thicken a cement mortar even in a small quantity added at a higher temperature and to improve water retention by admixing hydroxyalkylalkylcellulose having a specific grain size and a specific water moistening time and imparting an aqueous solution having a specific viscosity with cement mortar.
SOLUTION: This admixture for a cement mortar is a hydroxyalkylalkylcellulose having 4,000-20,000 mPa.s viscosity at 20°C and 1,500-12,000 mPa.s viscosity at 35°C respectively in terms of 1 wt.% aqueous solution. The hydroxyalkylalkylcellulose is obtained from high molecular weight pulp as a raw material and is pref. particulate matter prepared so as to include <30 wt.% particulate having ≥30 mesh size, to include ≤30 wt.% particulate having <200 mesh size and to have ≤10 sec water moistening time. It is suitable to add 0.05-3 pts.wt. (pref. 0.1-0.8 pts.wt.) admixture to 100 pts.wt. cement.
Inventors:
Tsutomu Yamakawa
Dedicated Takeaki
Dedicated Takeaki
Application Number:
JP19414499A
Publication Date:
January 10, 2007
Filing Date:
July 08, 1999
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C04B24/38; C04B103/44; (IPC1-7): C04B24/38; //C04B103:44
Domestic Patent References:
| JP61247649A | ||||
| JP62083347A | ||||
| JP3187961A | ||||
| JP6206753A | ||||
| JP6345505A | ||||
| JP9268046A | ||||
| JP11349364A | ||||
| JP8183647A | ||||
| JP10053448A |
Attorney, Agent or Firm:
Nao Okuyama
Arihara Koichi
Shoichi Okuyama
Arihara Koichi
Shoichi Okuyama