Research on Cement Slurry Using Silica Fume Instead of Fly Ash

Abstract

Ordinary cement is not environmentally friendly, has high cost and lacks superior performance. Many scholars use various admixtures to adjust the properties of cement slurry, but admixtures are usually not environmentally friendly, and it is difficult to ensure that the properties after deployment meet engineering requirements. In this study, a variety of admixtures were obtained using the environmental protection method, and the optimal mixing ratio was analyzed by combining the entropy weight method and the Taguchi grey relational analysis method. The developed cement slurry was compared with conventional slurry from both macroscopic and microscopic aspects. Aiming at the problem that previous scholars lacked the engineering feasibility verification of the developed slurry, this study combined the constitutive equation regression analysis method, discrete element numerical simulation and other methods to study various actual engineering conditions. The results show that the optimal mix ratio of silica fume cement slurry has good permeability characteristics under the conditions of different roughness, grouting pressure and confining pressure. At the same time, under different geological temperatures and different erosive liquid states, the cement slurry stone body shows good properties of reinforcement materials.

Seepage of Groundwater in an Underground Fractured Rock Mass and Its Sustainable Engineering Application

“…It is worth mentioning that rock fissures have a certain influence on seepage [38]. Moreover, aggregates also have certain effects on rock or stone bodies [39,40], but these issues were not considered in this study. While this study has yielded good results, the authors believe that further research into issues such as rock fracturing can lead to better results in the future.…”

Water Seepage in Rocks at Micro-Scale

“…In underground engineering, groundwater mainly flows through pores in rock. Presently [8][9][10][11], cement slurry grouting and water shutoff are commonly employed to plug rock pores [12,13]. This method has two disadvantages.…”