Construction and demolition waste (CDW) appear with potential application reused in sanitary landfills as alternative barriers, especially considering the use of its fine fraction. To fulfill literature requirements for landfill liners, the combination of CDW with bentonites appears as a feasible solution, while minimizes the use of natural resources and final CDW disposal problem. This paper describes the geotechnical performance of mixtures of CDW fine fraction with different contents of high-swelling sodium bentonite as well as chemical influence of curing time. Results showed that the plasticity of the mixtures was significantly increased with few bentonite contents. Compaction results were presented and unconfined compression strength results achieved minimum 200 kPa. Hydraulic conductivity drastically decreased with bentonite addition, reaching values of 10^–9 m/s 16% bentonite content. A high increase in the CEC was observed in the CDW–bentonite mixtures, corroborating to material application in landfills. The presence of CDW fine fraction reduced the free swell index of bentonite. The curing period of 180 days showed to reduce swelling results, mainly due to the presence of calcium, magnesium oxide and pozzolana reactions. This research showed the feasibility of using CDW–bentonite mixtures as a landfill liner material.

建筑垃圾和拆毁废物（CDW）的出现具有潜在的应用前景，可作为替代性屏障重新用于卫生垃圾填埋场，特别是考虑到使用其细碎颗粒。为了满足填埋场衬板的文献要求，将CDW与膨润土结合起来是一种可行的解决方案，同时最大程度地减少了对自然资源的使用和最终的CDW处置问题。本文描述了不同含量的高膨润土膨润土含量的CDW细颗粒混合物的岩土性能以及固化时间的化学影响。结果表明，几乎没有膨润土含量，混合物的可塑性明显提高。给出了压实结果，无边压缩强度结果至少达到200 kPa。加入膨润土后，水力传导率急剧下降，^–9  m / s 16％的膨润土含量。CDW-膨润土混合物中CEC的升高很大，这证实了垃圾填埋场的材料应用。CDW细颗粒的存在降低了膨润土的自由溶胀指数。180天的固化时间表明减少了溶胀效果，这主要是由于存在钙，氧化镁和火山灰反应。这项研究表明了使用CDW-膨润土混合物作为垃圾填埋衬垫材料的可行性。