Utilizing Ultra-High Performance Concrete Overlay for Road Pavement Repair and Strengthening Applications

Lay Boon Tan; Milad Hafezolghorani; Azman Mohamed; Khaled Ghaedi; Yen Lei Voo

doi:10.46604/aiti.2023.12587

Authors

Lay Boon Tan Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia
Milad Hafezolghorani Dura Technology Sdn. Bhd., Chemor, Perak, Malaysia
Azman Mohamed Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor, Malaysia
Khaled Ghaedi Research and Development Center, PASOFAL Engineering Group, Kuala Lumpur, Malaysia
Yen Lei Voo Dura Technology Sdn. Bhd., Chemor, Perak, Malaysia

DOI:

https://doi.org/10.46604/aiti.2023.12587

Keywords:

UHPC overlay, fiber reinforced pavement, repair, strengthening, hot mixed asphalt

Abstract

This study aims to develop a new thixotropic ultra-high-performance concrete (UHPC) overlay for the repair and strengthening of damaged hot mix asphalt (HMA) pavements. The overlay is purposely designed to accommodate the roadway slope of up to 10% due to presence of viscosifying agent materials. The original UHPC materials are comprised of granite aggregate, ultra-fine calcium carbonate, shrinkage-reducing admixture, viscosifying agent, and expansive agent. The study is conducted with three sets of samples provided and considers thixotropic and mitigated shrinkage properties through comparing control (non-thixotropic) overlay 1 (thixotropic), and overlay 2 (thixotropic) mixtures. Based on the obtained results, only overlay 1 corresponds to the minimum requirement for pavement rehabilitation, with 160-200 mm flowability and -545.3 µm/m free shrinkage. As a result, an average 50 mm thick overlay 1 is selected to repair a damaged HMA pavement (1800 m²), while the field implementation procedures and drawing details are also presented in this paper.

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