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Volume Title: ICASGE2023

DOI: ICASGE-GEO

Ashraf Nazir ; Ashraf Nazir

Geotechnical Engineering (GEO)

Safe disposal of industrial wastes has become a challenge for most countries. With the rapid increase of textile wastes around the world it became urgent to find cost efficient way to reduce and reuse sludge. One of the most cost-effective methods in civil applications is mixing the sludge with collapsible soil to enhance its mechanical properties. The main perspective of this work is to emphasize the significance of microstructural analysis in interpreting the behavior of collapsible soil before and after treatment with textile sludge. Four techniques were performed to analyze the microstructure of three samples: collapsible soil, textile sludge, and soil mixed with 24 % textile sludge. These techniques are SEM (Scanning Electron Microscope), EDAX (Energy-dispersive X-ray spectroscopy), FTIR (Fourier Transform Infrared Spectroscopy), and X-ray Diffraction XRD. The results indicated that, the main reason of soil collapsing is that the structure of soil is held together by calcium carbonate bonds. These bonds are weakened and broken under the effect of load and saturation. In addition, the structure surface of soil contains many large bracket pores that make soil more susceptible to collapse. Also, the results explained the role of textile sludge in reducing the collapse potential of soil due to the aggregate shape of sludge, the high specific surface area and the high amount of pozzolanic materials, which contributed to form a strong cement bond between the soil grains. After soil treatment, pores are filled with textile sludge particles and soil converted from loess to dense structure

textile sludge; collapse potential; XRD; EDAX; SEM; FTIR

Geotechnical Engineering (GEO)