Utilizing Recycled Rubber and Municipal Waste Incineration Fly Ash in Cement-Stabilized Clayey Soils

Cement MSWIFA Rubber Soil Stabilization Shear Behavior.

Authors

  • Gehan Aouf
    jihane_aouf@hotmail.com
    Department of Civil Engineering, Beirut Arab University, Beirut,, Lebanon
  • Ghida Alhakim Department of Civil Engineering, Beirut Arab University, Beirut,, Lebanon
  • Lina Jaber Department of Civil Engineering, Beirut Arab University, Beirut,, Lebanon

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This study explores an innovative approach combining municipal solid waste incinerator fly ash (MSWIFA), cement, and recycled rubber to enhance soil properties. The research fills a research gap by exploring the synergistic effects of these materials, striving to strike a balance between strength and flexibility in soil stabilization. A total of 123 tests, comprising Proctor compaction and unconfined compression tests, were performed on clayey soil samples treated with varying stabilizer proportions: 10%, 20%, and 30% MSWIFA; 10%, 15%, and 20% cement; and 0%, 5%, and 10% rubber by dry weight. The tests revealed that the ideal blend of 5% rubber, 10% MSWIFA, and 20% cement resulted in a notable 294% increase in unconfined compressive strength and a significant enhancement in soil ductility, presenting a stark contrast to traditional cement-stabilized soils recognized for their brittleness and limited flexibility. This approach not only enhances soil characteristics but also promotes environmental sustainability by utilizing waste materials in the stabilization process.

 

Doi: 10.28991/CEJ-2024-010-11-017

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