中文摘要：

利用同轴回转黏度计、Zeta电位分析仪和坍落扩展度实验等手段,研究了硼砂对以低碱度硫铝酸盐水泥为基材的快硬自密实混凝土流动性、水泥浆体流变特性以及水泥颗粒ζ-电位的影响。结果表明：在一定范围内,随着硼砂掺量的增加,硼酸钙包裹水泥颗粒后产生滚珠效应和静电斥力作用,拆散其絮凝结构,释放约束的水,促进水泥颗粒在液相中的分散,使快硬自密实混凝土流动性有所提高;掺入聚羧酸减水剂后,减水剂占主导作用,且与硼砂具有良好的兼容性。

英文摘要：

The influence of borax on liquidity of the rapid hardening self compacting concrete（RHSCC） based on sulphoaluminate cement,rheological property of cement paste and surface potential of cement particles were studied by the rotary viscometer and the surface potential of the particle size analyzer slump spread.The test results show that with the increase of borax content in a certain range,the effect of ball and electrostatic repulsion are produced by calcium borate conforming with the cement particles,it can break up the flocculation structure,release the constrained water and promote cement particles to disperse in liquid phase,then the fluidity of rapid hardening self compacting concrete（RHSCC） is improved.The superplasticizer has a leading role,as well as has a good compatibility with borax after mixed with polycarboxylate superplasticizer.