1.三峡大学三峡库区地质灾害教育部重点实验室,湖北 宜昌 443002
2.河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210024
3.江南大学环境与土木工程学院, 江苏 无锡 214122
4.Flinders University College of Science & Engineering, S. A. 5042 Australia
闭东民(1998—),男,硕士研究生。主要从事废弃土资源化利用方面的研究。E-mail:837432321@qq.com
孔纲强(1982—),男,教授、博导,博士。主要从事能源岩土工程方面的研究。E-mail: gqkong1@163.com
收稿:2021-08-12,
修回:2021-11-28,
纸质出版:2022-10-28
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闭东民,孔纲强,陈庚等.废弃口罩加筋固化土的强度特性与破坏模式[J].防灾减灾工程学报,2022,42(05):993-998.
BI Dongmin,KONG Gangqiang,CHEN Geng,et al.Strength Characteristics and Failure Mode of Solidified Soil Reinforced by Waste Masks[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):993-998.
闭东民,孔纲强,陈庚等.废弃口罩加筋固化土的强度特性与破坏模式[J].防灾减灾工程学报,2022,42(05):993-998. DOI: 10.13409/j.cnki.jdpme.20210810003.
BI Dongmin,KONG Gangqiang,CHEN Geng,et al.Strength Characteristics and Failure Mode of Solidified Soil Reinforced by Waste Masks[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(05):993-998. DOI: 10.13409/j.cnki.jdpme.20210810003.
新冠疫情防控消耗大量一次性口罩,口罩废弃物处置量大、环境环保要求高;高含水率淤泥水泥固化土并作路基填料是解决路基优质填料来源难、价格高等问题的重要途径之一。提出利用废弃口罩加筋高含水率淤泥固化土并作路基填料的解决思路,以水泥为固化剂、以废弃口罩为加筋材料,实测不同废弃口罩掺量、尺寸及龄期条件下废弃口罩加筋水泥固化土的无侧限抗压强度值,探讨废弃口罩掺量、尺寸及龄期等因素对水泥固化土的加筋效果,以及废弃口罩加筋对水泥固化土破坏模式的影响规律。研究结果表明,废弃口罩适用于加筋高含水率淤泥水泥固化土,本文试验条件下废弃口罩的最佳掺量约为0.5%,无侧限抗压强度值提高约87.5%。废弃口罩加筋水泥固化土的无侧限抗压强度应力-应变曲线呈软化型,且废弃口罩的加筋作用提高了试样的抗变形能力;废弃口罩加筋水泥固化土呈现一定的塑性破坏特征。
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.
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