Low-alkali sulfoaluminate cement

Author: China National Development and Reform Commission
Publisher: China Building Materials Press
Publish Date: 2004-05-01
Features: This standard replaces JC/T659-1997 "Low Alkali Sulfoaluminate Cement." Compared to JC/T659-1997, the main changes are as follows:
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- Cement strength grade is changed to strength grade (Chapter 6 of the 1997 edition, Chapter 6 of this edition).
- New cement strength grade indicator values are determined (see Article 7.3).
- The cement strength test method is replaced by GB/T17671-1999 "Test Method for Strength of Cement Mortar (ISO Method)" instead of GB/T177-1985 "Test Method for Strength of Cement Mortar," and the water-cement ratio and cement mortar flow range for strength tests in this standard are determined (Article 7.3 of the 1997 edition, Article 8.3 of this edition).
- The 28-day free expansion rate test uses medium sand that meets GB/T17671 standards instead of GB/178-1977 standard sand (Article 7.5 of the 1997 edition, Article 8.5 of this edition).
Appendix A of this standard is normative.
This standard was proposed by the China Building Materials Industry Association.
This standard is under the jurisdiction of the National Cement Standardization Technical Committee (CSBTS/TC184).
The leading drafting unit of this standard is the Cement Science and New Building Materials Research Institute of the China Building Materials Academy.
The participating drafting units of this standard are:
China Building Materials Academy Zhongyan Special Engineering Materials Company, Tangshan Arctic Bear Special Cement Co., Ltd., Yangquan Lion Head Special Cement Co., Ltd., and Xiaogan Phoenix Cement Co., Ltd. Special Cement Plant.
The main drafters of this standard are: Zhang Qiuying, Zhang Datan, Bai Xianming, Diao Jiangjing, Huang Chunjiang, Han Guihua, Wang Xin, Shan Lianying, and Wang Xufang.
This standard was first published in 1997.