Study on the influence of waste slag content of double liquid grouting material characteristic

Abstract

At present, most of the existing researches focus on the single-mixing of a mineral admixture, such as fly ash, while relatively few studies have been conducted on the relationship between the composition of multiple mineral admixtures. As China's industrial base, the Northeast region emits a large amount of industrial waste every year, which pollutes the environment. In this experiment, in order to solve the environmental pollution problem of industrial waste slag, steel slag and ground slag are used as cementing materials to replace part of cement to prepare double liquid grouting materials. By comparing the different mass ratios of steel slag and ground slag, the relationship between the mass ratio of waste slag and the gel time, fluidity and compressive strength of concretion is obtained. The test results show that when the cement content is 40%, the volume of sodium silicate is 30%, the water-cement ratio is 0.8, and the ratio of steel slag to ground slag is 3:7, the 3d compressive strength of the slurry is as high as 14.57MPa, the 28d compressive strength is as high as 21.14MPa. The slurry has good stability, rheology, gelation and consolidation strength under this ratio parameter. This grouting material ratio realizes the resource utilization of steel slag and ground slag, and also proves that steel slag powder can be used as a raw material for grouting materials. At the same time, the consumption of cement is reduced.