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Evaluating the laboratory performance of circular materials as bitumen substitute : paving the way to a sustainable asphalt construction industry

Pol, C.R. van de (2021) Evaluating the laboratory performance of circular materials as bitumen substitute : paving the way to a sustainable asphalt construction industry.

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Abstract:With the effects of climate change becoming more visible, governments are progressively taking actions to reduce environmental impact. This in turn incentivizes the asphalt construction industry to adopt more environmentally sustainable practices. One of these practices is replacing the fossil bitumen binder in asphalt mixtures by circular materials, which could reduce the environmental significantly by lowering the need for bitumen and improving the performance of the final product. However, most studies on this subject substituted only a small percentage of the binder by the circular material, after which the modified binder was compared to the neat bitumen, which due to different stiffness cannot be used for the same application. This paper fills this gap by comparing the performance of five circular materials as bitumen substitute for varying weight ratios of the binder on rutting and fatigue resistance, required mixing and compaction temperatures and linear viscoelastic behaviour on an equi-stiffness level by using multiple penetration grade bitumen. The results showed similar to improved performance for binders containing up to 51.69% of circular materials. It can be concluded that high shares of certain circular materials can be added to the binder without significantly compromising or even improving the binder performance while reducing the environmental impact of the industry.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Programme:Construction Management and Engineering MSc (60337)
Link to this item:https://purl.utwente.nl/essays/88517
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