Effects of Recycled Plastic on the Performance of Polymer Modified Bitumen (PMB)—Long-Term Ageing and Fatigue
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
The use of recycled plastics in asphalt industry has been popular due to environmental and economic benefits. Recycled plastics can enhance the performance and durability of bitumen. Previous study has shown that partial replacement of SBS (styrene-butadiene-styrene) using recycled plastics in SBS modified bitumen can reduce the dynamic viscosity and improve its stress sensitivity as compared to conventional SBS modified bitumen. The present study aims to evaluate the effects of long-term ageing on the fatigue properties of SBS modified binder containing recycled plastics. Extended long-term ageing was conducted via the rolling thin film oven (RTFO) and pressurized ageing vessel (PAV) on SBS modified binders with different proportions and types of recycled plastics which include LDPE (low density polyethylene) and HDPE (high density polyethylene). After ageing, the fatigue performance of the binders was analyzed with respect to dynamic shear modulus (DSR). Results showed that the recycled plastics showed good potential to be used as partial replacement of SBS in SBS-modified binders in terms of its fatigue performance under long term ageing.
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International Conference on Road and Airfield Pavement Technology 2023
Pages: 177 - 185
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Published online: Feb 6, 2024
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