2018 Volume 13 Issue 3 Pages 223-235
In this research, in order to examine the mechanical properties of sands improved by chemical grout using acidic silica, a series of unconfined compression tests for the improved sand specimens was carried out. As a result, it was confirmed that the unconfined compression strength of the chemical grout sand depends on 50% particle size of the sand, uniformity coefficient and void ratio. Through discussing these factors on the strength of improved sand, a strength estimation equation for chemical grout soil was proposed using a soil pore size estimation method. It was revealed, however, that the strengths of improved sands estimated by the proposal method overestimated the test results for some of sands taken from fields. As it was found that fine particle content and calcium carbonate composition in sand made the strength decrease, the proposed equation was modified by taking those factors into account.
