Browsing by Author "Raymond Kwesiga"

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    Investigating the Use of Waste Polyethylene Terephthalate and Cement Kiln Dust on the Properties of Hot Mix Asphalt
    (2024-04-13) Raymond Kwesiga
    This study investigated the utilization of waste Polyethylene terephthalate (PET) and waste cement kiln dust (CKD) to enhance the characteristics of Hot Mix asphalt (HMA). It is wise to find sustainable solutions for reusing these materials in engineering applications, particularly in road construction, to mitigate the environmental impact of plastic and cement kiln dust. Polyethylene terephthalate exhibited superior performance in enhancing the moisture resistance of PET-modified asphalt. Various tests like penetration value test, softening point test, and ductility value test were conducted to assess PET's effectiveness, with PET proportions ranging from 2% to 10% by weight of bitumen. The findings indicated a reduction in penetration values and an increase in softening point values with higher PET percentages, although challenges of phase separation between the polymer and bitumen were observed. To address this issue, cement kiln dust was introduced into the PET-bitumen mixture to facilitate effective bonding. Different percentages of CKD were tested, and the addition of 2% CKD by weight of bitumen yielded improved results in storage stability testing. The indirect tensile strength ratio notably increased by 92.5%, indicating enhanced resistance of asphalt to moisture damage facilitated by PET. Overall, the research aimed to enhance the properties of HMA to bolster its resilience against moisture damage and potentially overcome phase separation challenges in modified asphalt.