Engineering Property of Strength in Sands Stabilized by Silicate Grout

In order to clarify the strength property of sands stabilized by silicate grout, We investigate the effect of negative pore water pressure U caused by dilatancy on the strength of stabilized sand and moreover the time-dependent strength behaviour. Through unjacketed tests, triaxial test, uniaxial creep test and so on, the main results are summarised as follows; 1) Effect of U on the strength of stabilized sand would be considerably large. The unjacketed test would be recommended to determine the strength of stabilized sands, especially where the injection region is below the ground water level. 2) The unconfined strength of stabilized sand in long-term load qCR is less than 50% of qu(ε1=0.5%/min), qCR is uniquely related to the strength of silicate gel, irrespective of density and grain size of stabilized sand.