JIANG Yong， NIU Yunhui， SONG Kaiping， LU Zhongyuan
（1. School of Materials Science and Engineering， Southwest University of Science and Technology， Mianyang 621010， China）
Abstract：The polyhydroxy retarding grinding aid named DE was synthesized by diethanolamine(DEA), epoxy chloropropane and sodium hydroxide, and its effect on the cement properties was studied. The effect of DE dosage on grinding effect, mechanical properties and setting times were investigated. In addition, the effect of DE on compatibility of cement with water reducers was discussed. The results show that DE reduces 80 μm sieve residue and increased the specific surface area effectively. Compared with the control group, the highest growth of 28 d compressive and flexural strength reaches 11.0% and 17.6% respectively. It is found that DE shows astrong retarding effect on cements. This is the case for the final setting time of cement is prolonged by 332 min mixed with 0.04% of DE, and DE reduces the loses through time of fluidity of cement paste 0.2%~14.4%。
Keywords: diethanolamine; modification; retarding; grinding aid
文章编号：1008-5548（2016）04-0092-06
DOI：10.13732/j.issn.1008-5548.2016.04.021
收稿日期：2015-08-07， 修回日期：2016-04-09，在线出版时间：2016-08-02。
基金项目：表面物理与化学重点实验室项目，编号 ：SPCXT201303；西南科技大学研究生创新基金，编号：15ycx014。
第一作者简介：蒋勇（1988—），男，硕士研究生，研究方向为水泥混凝土外加剂。E-mail：jiangyong7586@163.com。
通信作者简介：卢忠远（1961—），男，博士，教授，硕（博）士生导师，研究方向为新型复合建筑材料。E-mail：luy@swust.edu.cn。
