Extending the Black diagram of bitumen to three dimensions

Article Construction & Building Technology

Investigating the performance-related properties of crumb rubber modified bitumen using rheology-based tests

Mrinali Rochlani et al.

Summary: This research used Dynamic Shear Rheometer and Single Stress Creep Recovery tests to assess the impact of crumb rubber on bitumen performance. The results suggest that adding crumb rubber can improve the rheological, low temperature, permanent deformation, and fatigue properties of bitumen.

INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING (2022)

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Review Construction & Building Technology

Review of the Superpave performance grading system and recent developments in the performance-based test methods for asphalt binder characterization

Waleed Zeiada et al.

Summary: Asphalt binder plays a crucial role in the resistance of asphalt mixtures to pavement distresses, and the Superpave PG system aims to directly relate physical properties of binders to field performance. While the system represents a significant advancement, there are reported deficiencies in test methods and evaluation indicators. Addressing these deficiencies and selecting potential specification tests from performance-based methods can further refine the Superpave PG system.

CONSTRUCTION AND BUILDING MATERIALS (2022)

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Article Construction & Building Technology

Quantitative relationship of fundamental rheological properties of bitumen with the empirical Ring and Ball softening point

Jiqing Zhu et al.

Summary: This study uses G'/tan delta as a criterion to identify the relationship between the softening point of unmodified and polymer-modified bitumen. By applying logarithmic interpolation, an equivalent softening temperature is determined with high accuracy.

ROAD MATERIALS AND PAVEMENT DESIGN (2021)

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Article Construction & Building Technology

Characterisation of complex polymer modified bitumen with rheological parameters

Laurent Porot et al.

Summary: The use of modifiers for bituminous binders to enhance asphalt material performance has become common practice. The binder complexity resulting from this practice may not always be suitable for conventional testing methods. Efforts are being made to explore new ways to characterize complex binders, such as Polymer modified Bitumen. An inter-laboratory program was conducted to evaluate different test methods for these binders, with a focus on exploring rheological parameters obtained from Dynamic Shear Rheometer measurements.

ROAD MATERIALS AND PAVEMENT DESIGN (2021)

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Article Construction & Building Technology

Towards a unified performance based characterisation of bitumen and mastic using the DSR

Mrinali Rochlani et al.

Summary: The laboratory study examined the performance behaviors of three penetration grade 50/70 bitumens and corresponding mastics from different sources. Results showed that bitumen from different producers and provenances exhibited varied performance behaviors, and the addition of limestone filler also influenced the ranking based on specified behaviors.

ROAD MATERIALS AND PAVEMENT DESIGN (2021)

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Article Construction & Building Technology