Research On Mechanical Properties Of Cement Solidified/Stabilized Lead-contaminated Soils Under Freezing And Thawing Cycles

With the rapid development of our industry, making China’s economy showed a rapid growth trend, but also it bring a series of environmental problems,especially emissions of industrial pollutants, the land pollution is particularly serious, the land pollution of heavy metal. And this paper is mainly for the contaminated soil of Pb2+.By using cement solidified can get certain strength of the cement soil. Through the geotechnical test, freeze-thaw test, the establishment of mechanical model and micro analysis method, on the research of the mechanics of cement solidified lead-contaminated soils and frost resistance, it will provide some reference value in practical engineering,which use cement solidified lead-contaminated soils。And the main research works are as follows:(1) Analyzing the result of unconfined compressive strength test of cement solidified lead-contaminated soils,through every single factor (cement dosage, concentration of lead ion, curing age) to analyze the influence of various factors on the compressive strength of cement solidified contaminated soils,and the strength prediction formula of cement solidified lesd-contaminated soils was obtained by fitting experimental data;(2) Analyzing the result of unconfined compressive strength test of cement solidified lead-contaminated soils under the different freezing and thawing cycles, through every single factor (cement dosage, concentration of lead ion, curing age) to analyze the influence of various factors on the compressive strength of cement solidified contaminated soils, and the strength prediction formula with freeze-thaw cycles of cement solidified lesd-contaminated soils was obtained by fitting experimental data;(3) By using SEM test to analyze the cement solidified lead-contaminated soils’ changes in the under the microcosmic freeze-thaw cycles, which explain the change of macro mechanical properties.