Test Equipment and Application of Compression Properties of MSW

Abstract

In order to study the compression characteristics of municipal solid waste (MSW), a set of test device was independently developed. Five kinds of loading methods were analyzed, and the physical loading method using two levels of levers was selected. The experimental methods and operation process of the device were introduced. The laboratory test of compression characteristic of MSW by using self-developed device was carried out. Test application results show that the device can realize all pre-designed functions, and have the advantages of convenient operation, stable loading and small occupied floor space. As the stress is 100 kPa, 200 kPa, 300 kPa, 400 kPa, the strain of MSW is 42.4%, 49%, 54.1% and 59.25% respectively. The compression amount of the first 6 days reaches about 80% of the total compression. The compression amount of the pre-test specimen increases with the increase of the pressure, while the deformation rate of the later stage decreases. The instantaneous strain of MSW is basically linear to the pressure. The research results enrich the experimental equipment for studying the compression characteristics of municipal solid waste so as to provide data support for the subsequent research on the settlement model of landfill.