Factors affecting properties of MSWI bottom ash employing cement and fiber for geotechnical applications

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.

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Correspondence to Davinder Singh.

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Singh, D., Kumar, A. Factors affecting properties of MSWI bottom ash employing cement and fiber for geotechnical applications. Environ Dev Sustain 22, 6891–6905 (2020). https://doi.org/10.1007/s10668-019-00519-w

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Keywords

  • MSWI bottom ash
  • Cement
  • Fibers
  • Stabilization
  • CBR