Study on the effect of mineral admixtures on working and mechanical properties of the grouting material

Aiming at the existing grouting material, there are a series of problems such as poor fluidity grouting, rapid loss fluidity, non-compactness after hardening, gaps or holes, and like. In this paper, fly ash, limestone powder, silica fume used to replace cement, influence mineral admixtures on rheological properties, strength material systematically studied. The experiment found that: can all improve effect ash is best. Compared with pure cement initial 60 min mixed 40 wt% were reduced by 35.5% 53.8% respectively. Fly powder into will significantly while reduce flow properties grouting. addition mechanical material. 28 days compressive 4 4.5%, flexural 6%; increased 6.5%, 1%.