THE EFFECT OF SODIUM SILICATE ON CEMENT-SODIUM SILICATE SYSTEM GROUT

摘要

Chemical stabilization is the effective method to improve the soil properties by mixing additives to soils. For many years, the term chemical grout was synonymous with sodium silicate grouts but in the last three decades a lot of chemical compounds were produced as chemical grouts which provide a wide selection for grouting. This paper presents the effect of varieties ratio of sodium silicate on the viscosity of sodium silicate system grout. The viscosities of different grout were carried out by using Brookfield viscometer and other related accessories. The results indicated that, the cement-sodium silicate system grout with kaolinite is the same non-Newtonian fluids and by increasing sodium silicate from 0 to 30%, the viscosity curve changed to three different shapes. Furthermore, the results showed that it is not possible to use one compound system for cement grout with high amount of sodium silicate, due to very rapid onset of reactions among the grout components. Hence, two compound system grouts should be used for injecting sodium silicate system grout. The bleeding problem of cement grout can be avoided by using low ratio of sodium silicate with the cement grout.