Research on Road Performance of Cement-cured Recycled Aggregate Modified Saline Soil
In order to increase the utilization rate of construction solid waste and improve the road performance of saline soil,in the paper,the saline soil is modified by recycled aggregate(RCA),the compaction characteristics,unconfined compressive strength,freeze-thaw resistance,and water stabilization properties of recycled aggregate-saline soil mixture are tested,and the mechanical properties of the cured soil with different cement and RCA mixing ratios and the durability properties of the cured soil with different RCA mixing ratios are studied respectively.The results show that:with the increase of cement doping,the mechanical properties of cured soil are obviously improved;with the increase of RCA doping,the mechanical strength of cured soil increases firstly and then decreases,and reaches the maximum when the doping ratio is 40％,and the maximum strength is 57.3％higher than that of the specimen without RCA doping.The durability of cured soil can be improved by the addition of appropriate amount of RCA,and it has better water stability and frost resistance when the dosage of RCA is 30％～40％.Considering the various properties of cured soil,the dosage of RCA should be controlled between 30％and 40％,and the mechanical properties and durability can be guaranteed.
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