Understanding the Influence of Design Factors and Volumetrics on Moisture Susceptibility of Hot-Mix Asphalt
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 8
Abstract
This study evaluated the individual and cumulative impact of different design factors on moisture damage of hot-mix asphalt (HMA) using the modified Lottman test. This study considered five different types of design aggregate gradations (DAG), three binder types, and three levels of compactive effort. To evaluate the significance of the influential factors that affected the moisture sensitivity of the mix, statistical analysis was performed. This study also investigated the influence of volumetric parameters of the bituminous mixes on moisture damage. The correlation of different design factors and various volumetric parameters with the tensile strength ratio (TSR) was further investigated through analysis using the Pearson correlation coefficient. The need for this investigation arises from the scarcity of comprehensive studies examining the individual and combined effects of various factors and the impact of volumetric parameters on moisture susceptibility. Additionally, linear regression models were developed to predict TSR based on the design factors and volumetric parameters considered in the study. The final model showed a close fit, with low mean absolute percentage error () and a good coefficient of determination (). Moreover, based on the tested mixtures, the study establishes a threshold value of dry indirect tensile strength () and wet indirect tensile strength (), along with TSR (= 0.85).
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
The authors express their gratitude to the National Highway Authority of India (NHAI), Government of India, for funding the current research. Special thanks are extended to GR Infraprojects Limited for their valuable support in establishing the Road Research Laboratory at IIT (BHU), Varanasi.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 20, 2023
Accepted: Jan 30, 2024
Published online: May 30, 2024
Published in print: Aug 1, 2024
Discussion open until: Oct 30, 2024
ASCE Technical Topics:
- Asphalts
- Concrete
- Damage (material)
- Engineering fundamentals
- Engineering materials (by type)
- Hydrologic engineering
- Hydrology
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Materials processing
- Mathematics
- Moisture
- Parameters (statistics)
- Statistics
- Strength of materials
- Tensile strength
- Water and water resources
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