Rheological characteristics of cement-sodium silicate grout in its fluid–solid phase transition process
Rheological characteristics of cement-sodium silicate grout in its fluid–solid phase transition process
复制标题
水泥-水玻璃浆液流固相变过程的流变特性
DOI：
10.1016/j.conbuildmat.2022.129443
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发表时间：
2023-01
影响因子：
7.4
通讯作者：
Liu Jun
中科院分区：
文献类型：
--
作者：
Zhang Lianzhen;Han Xu;Zhang Qingsong;Chu Yuntian;Liu Jun
速凝浆液在流固相变过程中的流变性是注浆扩散设计中需要考虑的一个重要因素。本文采用水泥-水玻璃灌浆(简称C单粘结灌浆)作为一种典型的速凝灌浆材料。研究了快凝浆液在整个相变过程中的流变特性，包括相变时间、浆液粘度和屈服应力。分析了水灰质量比(W/C质量比)和水泥水玻璃比(C/S体积比)对快凝浆液流变性的影响。结果表明，C单胶凝胶浆的凝胶反应过程可分为三个阶段：流体相、流固相和固相。其中，C单粘结浆液的剪应力随着流体向流固相转变而迅速增大。在水/炭质量比为0.8~2.0、C/S体积比为1~3的条件下，CSingle粘结浆液的流变本构关系始终属于宾汉模型。
The rheology of quick-setting grout during the phase transition from fluid to solid is a key factor for consideration in grouting diffusion design. In this paper, cement-sodium silicate grout (Csingle bondS grout) was used in the experiment as a typical quick-setting grout. The rheological properties of quick-setting grout during the entire phase transition period, including phase transition time, grout viscosity, and yield stress, were investigated. The influences of water-cement mass ratio (W/C mass ratio) and cement-sodium silicate ratio (C/S volume ratio) on rheological properties of quick-setting grout were analyzed. Results show that gel reaction process of Csingle bondS grout can be divided into three stages: fluid phase, fluid–solid phase, and solid phase. Among them, shear stress of Csingle bondS grout increased rapidly with phase transition from fluid to fluid–solid state. The rheological constitutive relation of Csingle bondS grout always belonged to the Bingham model with W/C mass ratio ranging from 0.8 to 2.0 and C/S volume ratio ranging from 1 to 3. A rheological model of Csingle bondS grout was presented, among which the relationship between rheological parameters and reaction time is expressed by exponential functions.
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