Factors influencing properties of phosphate cement-based binder for rapid repair of concrete
Factors influencing properties of phosphate cement-based binder for rapid repair of concrete
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DOI：
10.1016/s0008-8846(98)00230-0
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发表时间：
1999-03-01
影响因子：
11.4
通讯作者：
Wu, XL
中科院分区：
文献类型：
--
作者：
Yang, QB;Wu, XL
将氧化镁粉(M)、磷酸二氢铵粉(P)、硼砂粉(B)混合，制备了磷酸盐水泥基粘结剂。研究了缓凝剂B掺量、粉末冶金比、高岭土细度、粉煤灰掺量和环境温度等因素对磷酸镁水泥基胶凝材料凝结时间和力学性能的影响。结果表明，胶凝时间和早期强度主要受B的加入量、M的细度和温度的控制，而这些因素对胶凝材料的最终强度影响不大。有趣的是，即使在零下10摄氏度下，MPB也能在1小时内凝结并硬化。(C)1999爱思唯尔科学有限公司。保留所有权利。
Phosphate cement-based binders were prepared by mixing MgO powder (M) with NH4H2PO4 powder (P) and borax powder (B). Effects of various factors including the amount of retarder B, P/M ratio, fineness of hi, and addition of fly ash and environment temperature on setting time and mechanical properties of magnesium phosphate cement-based binder (MPB) were investigated. Results showed that the setting time and early strength of MPB were mainly controlled by the amount of B, the fineness of M, and temperature, but that these factors had little influence on the final strength of the binder. It is interesting that MPB sets and hardens within 1 h, even at -10 degrees C. A setting and hardening mechanism on MPB is proposed. (C) 1999 Elsevier Science Ltd. All rights reserved.