废弃口罩加筋固化土的强度特性与破坏模式

COVID-19 prevention and control consumed a large number of disposable masks,which had a large amount of waste disposal and high environmental protection requirements. It is one of the important methods to solve the problems of difficult source and high price of high-quality subgrade fillers. This paper proposes the solution of used waste masks to reinforce sludge solidified soil with high moisture contents，which will be used as subgrade fillers，with cement as curing agents and waste masks as reinforcing materials，the unconfined compressive resistance of waste mask reinforced cement solidified soil under different waste mask contents，mask sizes and ages is measured，additionally，the influences of the mask sizes and ages on the reinforcement effect of cement solidified soil are discussed，and this study also analyze the influence of reinforcement of waste mask on the failure modes of cement solidified soil. The results show that，under the experimental conditions，the optimum content of waste mask is about 0.5%，and the unconfined compressive strength is increased by about 87.5%. The stress-strain curve of unconfined compressive strength of cement-solidified soil reinforced with waste masks shows a softening pattern，and the reinforcement of waste mask improves the deformation resistance of the sample. The cement-solidified soil reinforced with waste masks presents a certain plastic failure characteristic.