Analysis of Strength and Compression Damage Characteristics of Soil Rock Mixture Based on Geopolymeric Reaction

Abstract

Geopolymers was a common means of solidifying soil which can improve the overall strength of the soil. In order to further explore the strength and damage characteristics of the soil-rock mixture under the action of gel coagulation, this paper analyzed the compressive strength of the soil-rock mixture under different stone content through the unconfined compressive strength test. The results illustrated that when the amount of stone was small, the compressive strength decreases linearly with the increase of the amount of stone, and increased with the increase of the amount of geopolymer; According to discrete element method, using PFC2D software, to simulate the microscopic deformation and mechanical properties of the specimen during compression. The increase of stone content would magnify the damage of the soil when it reached the failure, but it did not necessarily increase the overall soil mass numerically. The strength of the soil would be greatly improved when the stone content reached a state that could form a skeleton structure.