Factors affecting properties of MSWI bottom ash employing cement and fiber for geotechnical applications
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Factors affecting properties of MSWI bottom ash employing cement and fiber for geotechnical applications Davinder Singh1 · Arvind Kumar1 Received: 4 December 2018 / Accepted: 11 November 2019 © Springer Nature B.V. 2019
Abstract The present study is based on municipal solid waste incineration (MSWI) bottom ash stabilization when amended with cement and fiber. To simulate the effect of inclusion of cement and fibers on the behavior of MSWI bottom ash, numerous experiments were performed. The CBR test was considered as a basic parameter during the study. For CBR, a comparison was made among different test specimens under soaked and unsoaked conditions, with and without cement and fibers. The maximum dry unit weight of the bottom ash reduces, and moisture content rises due to the inclusion of cement and fiber. The results revealed that the relatively better combination was found to be highest gain of CBR value in case of 8% cement and 1% fiber. The study results also demonstrated that addition of fiber used to stabilize MSWI bottom ash reduces the stiffness as well as changes the behavior from brittle to ductile. Due to the free availability, such material can be used in compacted fills, embankments and road construction in very liberal manner. A multiple linear regression analysis of test results was carried out in order to develop a mathematical relationship to understand the intensity of different factors, i.e., MSWI bottom ash, cement content, fiber content, fiber length and curing period. The simulated model agreed reasonably with the experimental results. Keywords MSWI bottom ash · Cement · Fibers · Stabilization · CBR
1 Introduction Nowadays, due to bulk increase in municipal solid waste incineration (MSWI) ash, its disposal in an environmental friendly manner is becoming a burden as well as the global concern. The resulting bottom ash extracted from incineration of municipal solid waste as a by-product is generally inorganic in nature and consists of oxides of aluminum, calcium, iron, silicon and other components. The resultant compounds are produced directly by the chemical interaction of various components during incineration, and rest of the part can be manufactured through the interaction of various compounds existing * Davinder Singh [email protected] 1
Department of Civil Engineering, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India
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into the burning environment. Thus, in order to reuse such waste components and to remediate their disposal issue, the geotechnical application is being an important aspect. Before taking the MSWI bottom ash for such application, it is necessary to stabilize it. In modern construction practice, lime was used as a stabilizing agent, in the year 1924 (Mc Caustland 1925). As the roads were required to be expanded in width to cope up with the increased volume of vehicular traffic in the year 1930, the stabilization of soils began to rise. The present scenario shows that numerous modes of stabilizat
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