Study on the design and laboratory investigation of permeable semi-rigid base material with large air voids
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 2 January 2024
Issue publication date: 10 January 2024
Abstract
Purpose
To explore the economical and reasonable semi-rigid permeable base layer ratio, solve the problems caused by rainwater washing over the pavement base layer on the slope, improve its drainage function, improve the water stability and service life of the roadbed pavement and promote the application of semi-rigid permeable base layer materials in the construction of asphalt pavement in cold regions.
Design/methodology/approach
In this study, three semi-rigid base course materials were designed, the mechanical strength and drainage properties were tested and the effect and correlation of air voids on their performance indexes were analyzed.
Findings
It was found that increasing the cement content increased the strength but reduced the air voids and water permeability coefficient. The permeability performance of the sandless material was superior to the dense; the performance of the two sandless materials was basically the same when the cement content was 7%. Overall, the skeleton void (sand-containing) type gradation between the sandless and dense types is more suitable as permeable semi-rigid base material; its gradation is relatively continuous, with cement content? 4.5%, strength? 1.5 MPa, water permeability coefficient? 0.8 cm/s and voids of 18–20%.
Originality/value
The study of permeable semi-rigid base material with large air voids could help to solve the problems of water damage and freeze-thaw damage of the base layer of asphalt pavements in cold regions and ensure the comfort and durability of asphalt pavements while having good economic and social benefits.
Keywords
Acknowledgements
The authors thanked the Science and Technology Project of Heilongjiang Provincial Department of Transportation, “Application Research on High Performance Graded Gravel Base for Upgrading the Overall Performance of Asphalt Pavement in Cold Regions” (HJK 2016B016); “Research on the Application of Coal Gangue Burning Slag in Highway Pavement Base and Depth” (HJK 2019B001); “Research on Anti-Longitudinal Cracking Countermeasures of Asphalt Pavement Based on Water Temperature Characteristics of Cold Region Highway Base” (HJK 2019B009); “Research on Coal Gangue Burning Slag in Highway Pavement Base and Depth Application” (HJK 2019B003) and other projects for supporting and financing this research.
Citation
Li, X., Xiao, Z., Zhao, Z., Sun, J. and Liu, S. (2024), "Study on the design and laboratory investigation of permeable semi-rigid base material with large air voids", International Journal of Structural Integrity, Vol. 15 No. 1, pp. 146-161. https://doi.org/10.1108/IJSI-07-2023-0057
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited