论文部分内容阅读
采用膨润土等量取代磷酸镁水泥的方法,研究了膨润土对磷酸镁水泥流动度、凝结时间、强度、水化热和早期收缩的影响,并对水化产物进行了分析与讨论。结果表明,膨润土降低了磷酸镁水泥的流动度、凝结时间和强度,为保证施工的可操作性,其掺量应控制在10%以内;膨润土有效降低了磷酸镁水泥的放热速率和放热量,减少了其早期收缩;掺有膨润土的磷酸镁水泥的水化产物中存在膨润土的主要成分蒙脱石和石英;膨润土影响了磷酸镁水泥的水化过程、水化产物的数量及其结晶程度。
The effect of bentonite on the fluidity, setting time, strength, heat of hydration and early shrinkage of magnesium phosphate cement was studied by using bentonite equivalent replacement of magnesium phosphate cement. The hydration products were also analyzed and discussed. The results show that bentonite reduces the fluidity, the setting time and the strength of the magnesium phosphate cement. In order to ensure the operability of the construction, the content of the bentonite should be controlled within 10%; the bentonite effectively reduces the exothermic rate and the exothermic amount of the magnesium phosphate cement , Which reduced their early shrinkage. The main components of bentonite were montmorillonite and quartz in the hydration products of bentonite-bearing magnesium phosphate cement. The bentonite affected the hydration process, the amount of hydration products and the degree of crystallization of magnesium phosphate cement.