Research on preparation and performance of new composite cement-based weakly consolidated soil grouting material
WU Guanzhong
QIAO Zhen
SONG Li
ZHANG Jun
LI Wenbin
YANG Tingting
YANG Yuanyi
Abstract：The site of Jiaopingdu Cave is a typical weakly consolidated soil,which is prone to dissociation and collapse in the face of long-term underwater conditions.Thus,it is necessary to strengthen and protect the weakly consolidated soil of the site.In this paper,a new.type of composite cement-based grouting material was obtained by orthogonal test and single factor test,and the curing reaction mechanism of the grouting material was described.Finally,the feasibility of using grouting materials was evaluated through in-door simulation grouting experiments.The results showed that the optimal ratio of composite cement grouting material is m(water)∶m(ordinary Portland cement)∶m(sulfoaluminate cement)∶m(mineral powder)∶m(silica fume)=0.38∶0.49∶0.21∶0.20∶0.05∶0.05.At this time,the system has good workability and water resistance,and the stone body has significant advantages such as light weight,early strength,and good volume stability.The grouting material has good injectability in the site soil and has a significant reinforcement effect on the site soil,providing a new idea and solution for the development of strengthening and protection technology of weakly cemented soil sites.
Keywords：the cave in JiaopingduPortland cementsulfoaluminate cementgrouting materialorthogonal test
Publication Date：2025-01-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)