Performance evaluation of fly ash and calcium carbonate in red soil as landfill liner

DOI

No DOI

Conference

Innovations in Computing, Materials and Communication Technologies

Organised By

IES College of Engineering

Conference Date

15 May 2023

Pages

07-15

Article Type

Research Article

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Rapid technological advances and population lead to the generation of increasingly hazardous wastes. Thus, the long-term option available to manage the waste generated is to dispose it on the earth’s surface. To minimize the impact of waste on the environment, final disposal is done in “Engineered Landfills”. Landfills are thus designed considering various parameters to meet their requirements. Landfill liners are exposed to various types of physical, chemical and biological processes which are affected by leachate produced from the decomposition of waste dumps. Therefore, the materials, which are used, should have low hydraulic conductivity. This study is an attempt to use the locally available soil, nano calcium carbonate, and fly ash mixture as a potential liner. In this paper, the variation in properties such as hydraulic conductivity, dry density, OMC, Atterberg’s limits etc. are studied by mixing nano calcium carbonate with fly ash and red soil in various percentages. Fly ash is added in different percentages from 2 to 10%. From the compaction result, found that optimum dosage of fly ash. To this soil mixture, tests are done with nano calcium carbonate varying from 0.2 to 1%. Although NCC alone increase the strength of the soil as a stabilizer, the impact of NCC on fly ash as a stabilizer is studied in this work.