Study on the effect of light burned magnesia on the properties of sleeve grouting materials

Abstract

The effect of light burned magnesia on the performance of sleeve grouting under different content gradients was studied. The results show that the light burnt magnesia content has no significant effect on the fluidity of the grout when it is less than 5%. The incorporation of light burned magnesia improves the compressive strength of the sleeve grout and the expansion rate of 14d∼56d in restrict condition. The incorporation of light burned magnesia can effectively solve the problem of shrinkage of the grouted slurry volume in the later stage and improve the compressive strength of the sleeve grout.