SJP注浆浆液水化进程与流变特性研究

发布时间：2018-03-03 17:19

本文选题：SJP注浆材料　切入点：黏时变性　出处：《岩土工程学报》2017年02期 　论文类型：期刊论文

【摘要】：针对陡倾宽缝、松散架空等复杂地层灌浆,普通水泥浆存在"灌不住"、"顺缝跑"等问题,研制开发的SJP水泥基灌浆材料具有初始流动度大、可灌性好,接近可泵期时表现为黏度突增、流动度突降的流变特性。SJP浆材是水泥基浆材掺加改性纤维、硅钙早强剂与稳定剂配制而成,助剂加量为2%~2.5%。掺入水泥浆中的助剂首先在水泥颗粒表面形成溶剂膜,起到调节水泥水化离子与助剂硅钙阳离子浓度变化的作用,实现水化加速期控制成核的速度,最后掺入的稳定剂可以调整水泥水化衰减期的成核和扩散,调节水泥浆的流动时间。SJP浆材由于水化速度快,流动时间可控,水化产物凝结胶连紧密,结石体后期强度较普通水泥浆平均提高15%~25%,解决了水泥基速凝浆材早期强度高后期强度低的问题,得到了较大范围的推广应用。
[Abstract]:In view of the problems of grouting in complicated strata such as steep sloping and wide fracture, loose overhead, common cement slurry and so on, the developed SJP cement grouting material has high initial fluidity and good irrigability. Rheological Properties of SJP Pulp was made of cement based slurry mixed with modified fiber, calcium silicate early strength agent and stabilizer. The additives added to the cement slurry are 2. 5% and 2. 5% respectively. First of all, the additives added into the cement slurry form a solvent film on the surface of the cement particles to regulate the change of the concentration of cement hydration ions and calcium silicate cations, and to control the rate of nucleation during the accelerated hydration period. Finally, the stabilizer can adjust the nucleation and diffusion of cement hydration decay period, and adjust the flow time of cement slurry. Because of the rapid hydration speed, the flow time is controllable, and the hydration product condensate is tightly connected. Compared with ordinary cement slurry, the later strength of stone body is increased by 15% and 25% on average, which solves the problem of low strength and high strength in the early stage of cement based rapid solidification material, and has been widely used.
【作者单位】：成都理工大学地质灾害防治与环境保护国家重点实验室;云南驰宏资源勘查开发有限公司;
【基金】：国家自然科学基金项目(40402025) 成都理工大学地质灾害防治与地质环境保护国家重点实验室团队重点项目(SKLGP2014Z001)
【分类号】：TU578

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