During the period of building construction on the beach clay, the sludge foundation treatment of large area is the most important issue. The chemical strengthening of silt using curing agent is one of the effective and feasible foundation treatment methods. In order to obtain the physical characteristics of stabilized soil, a great deal of laboratory tests were done to study the strength of stabilized soil which were prepared using beach clay as raw material, cement as curing agent, composite additives as additive agent, and the best ratio for silt is obtained. The microscopic characteristics and curing mechanism of stabilized soil is studied using the microscopic test to analyze the pore structure of stabilized soil. The test results show that the ratio of the curing agent has a positive effect, and can provide fundamental basis for the engineering application of the coastal mud flat silt solidification.
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