Research on the Performance of Expansive Soil Modified by Construction Waste and Fiber
To improve the road performance of expansive soil and realize the resource utilization of construction waste,this paper studies the strength and expansion characteristics of expansive soil improved by glass fiber and construction waste,and explores the improvement mechanism combined with the microscopic characteristics.It is found that both construction waste and glass fiber can significantly improve the strength of expansive soil and reduce the swelling and shrinkage characteristics of expansive soil.The high content of construction waste and glass fiber will cause the internal pores of the improved expansive soil to be unable to fill effectively and the fiber clumping phenomenon,which will affect the road performance of the improved expansive soil.The optimal content of construction waste and glass fiber is 40% and 0.6% respectively.The microscopic test results show that fiber can provide adhesion points for expansive soil,thus enhancing the internal structure of expansive soil.The above research results can provide a theoretical basis for the improvement of expansive soil and the resource utilization of construction waste.
expansive soilconstruction wasteglass fiberstrength characteristicsexpansion and shrinkage characteristicsmicrostructure
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