Study on the Permeability Characteristics of Sand Reinforced with Polymer Soil Stabilizers

The constant head permeability test and variable head permeability tests were carried on polymer reinforced sand to study the influence of polymer concentration,density and curing time on the permeability of reinforced sand. The reinforcement mechanism of polymer was analyzed in depth with the test results and SEM. The results show that the polymer concentration,curing time and density have a significant influence on the permeability of the reinforced sand. With the polymer concentration,density and curing time increasing,the initial time of outflow water become longer,the permeability coefficient decreases rapidly,and relative permeability resistance coefficient of the sand increases rapidly. The most significant effects of the polymer concentration and curing time on the permeability of the reinforced sand are 1%-5% and 3～12 h. The polymer membrane in the sand forms a stable structure through wrapping and connecting sand particles,so as to enhance the bond strength between sand particles,and reduce the void