Experimental Research on Sodium Silicate Chemical Grouting Material with Low Viscosity

In order to solve the grouting difficulty with particle grout material in micro fissures and porosity aquifer of deep base rock in the coal mine, a study on th e chemical grouting material of solution type sodium silicate was conducted.The orthogonal experiment was applied to study the modulus of sodium silicate, the volume fraction of sodium silicate, the volume fraction of ethyl alcohol glacial acetic acid affected to the gelatinous time of the grout, the viscosity and the compressive strength of the grout consolidated sand mass.The orthogonal experiment showed that the most obvious factor affected to the gelatinous time of the grout was the volume fractio n of ethy| alcohol glacial acetic acid and the most obvious factor affected to the grout viscosity and the compressive strength of the consolidated sand mass was the vol ume.The experiment results showed that to take ethyl alcohol glacial acetic acid as the gelatinizing agent of sodium silicate could have a new sodium silicate grout with a higher compressive strength (about 1 MPa) of consolidated rock mass, an adjustable gelatinous time (5 ~ 30 min) and a lower viscosity (≤6 mPa.s) .