Atil, Aida Atiqah (2023) The engineering properties of polyurethane-clay composite (PU-CC) doped with untreated and treated waste treatment. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

The versatility of polyurethane (PU) properties has the potential to improve the compressive strength, shear strength, and buoyancy force in soil improvement applications. The PU waste materials were issued as disposal management that can impact environmental pollution when these materials were dumped into landfills. In this study, Polyurethane-Clay Composite (PU-CC) samples were prepared with different ratios of untreated and treated PU waste filler (PUF) loading (0 wt%, 2.5 wt%, 5 wt %, 7.5 wt%, and 10wt%) namely as \Polyurethane-Clay Composite Untreated (PU-CCUN), Polyurethane-Clay Composite treated by the oven (PU-CCTO) and Polyurethane-Clay Composite treated by microwave (PU-CCTM). In accordance with ASTM standard, all the testing were successfully performed for fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), thermogravimetric (TGA), water absorption, buoyancy, unconfined compressive strength (UCS) and direct shear strength). The PU-CCUN5 exhibited the highest water absorption of 20 % followed by PU-CCTO10 at 15% and PU-CCTM2.5 at 5% respectively. The PU-CCTO gives the high buoyancy force at 10 wt% of PU-CCTO10 samples at 50% followed by 45% of PU-CCTM10, and the lowest at 2.5 wt% of PU-CCUN2.5 at 8%. The UCS and shear strength shows obviously the highest at 300 kPa and 50 kPa of PU-CCTO10 followed by PU-CCTM2.5 at 130 kPa and 19 kPa and PU-CCUN2.5 at 100kPa and 15kPa, respectively. PU-CCTO treated by drying oven has the highest buoyancy force at 10% of PU-CCTO10 samples at 50%, followed by 45% of PU-CCTM10 treated by microwave, and the lowest at 2.5 wt% of PU-CCUN2.5 untreated at 8%. In conclusion, the 10 wt% of PU filler treated by drying oven method as an PU clay composite has the potential as an alternative material to improve the compressive strength, shear strength, and buoyancy force in the soil improvement

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