【摘要】 研究了灌浆水泥在采用掺加减水剂、调节W/C及压力灌浆三种增加流动度方法时,其硬化浆体的膨胀性能;探讨了灌浆硬化水泥浆体的膨胀机理,提出硬化水泥浆体的膨胀是由于钙矾石结晶压力、凝胶粒子间的静电斥力和凝胶的溶账现象共同作用的结果,三种作用的相对大小随水化硬化进程而变化。更多还原

【Abstract】 The expansion properties of hardened grouting cement paste were stndied for three methods of increasing fluidity, e.g., adding superplasticiszer, adjusting water-cement ratio and grouting at high pressure. Expansion mechanism of the hardened grouting cement paste is discussed.It is concluded that the simultaneous action of ettringite crystallization pressure, electrostatic repulsion in gel particles and swelling of gel results in the expansion of the hardeend cement paste, but effects on hydration of the above action vary with the process.更多还原