Research on the Performance of Improved Construction Waste as Subgrade Filler
Using construction waste as the research subject,basic engineering properties of the native soil were investigated through laboratory tests including specific gravity,compaction,california bearing ratio(CBR),and shear tests.Based on the test results,the construction waste was further modified with lime,cement,and sand to enhance its suitability as a subgrade filler.The results show that all three additives significantly improve the road performance of the construction waste.Specifically,when4%cement was added,the CBR value of the modified soil reached 130.66%,representing an increase of 116.45%compared to the untreated soil.When4%lime was added,the CBR value was128.59%,an increase of 114.38%compared to the untreated soil.Although the addition of 5%sand also improved the CBR value,the effect was less pronounced than that of cement and lime.Furthermore,the shear strength of the untreated soil improved after modification with cement,lime,and sand.The optimal shear strength was achieved with 5%cement,4%lime,and 5%sand,resulting in increases in cohesion of 154.0%,164.5%,and 74.6%,respectively,and increases in the internal friction angle of 343.7%,310.2%,and 78.3%,respectively,compared to the untreated soil.
subgrade fill materialconstruction wasteimprovementload bearing ratio
万方数据
维普
