Fundamentals of permeability in asphalt mixtures
Document Type
Article
Publication Date
12-1-1999
Abstract
Permeability is an important property of asphalt mixtures. However, there is confusion concerning the measured value of coefficient of permeability obtained from different sources. It is not uncommon that reported values for comparable materials have ≤ 100 times difference. An investigation was carried out at the Louisiana Transportation Research Center to study the drainability of five types of asphalt mixtures used for pavement surface layers and as base course layers. These mixes include a conventional design of Louisiana Type 8 dense-graded mixtures, 19-nm Superpave wearing course mixtures, a traditional open-graded Louisiana Type 501 asphalt treated base mixture, and a newly developed open graded large stone asphalt mixture. A dual mode flexible wall permeameter was developed to measure water permeability or the hydraulic conductivity of asphalt mixtures. The device worked on constant head and falling head principles, and was capable of determining the material hydraulic conductivity when the common Darcy's Law is no longer valid. A statistical model to determine the hydraulic conductivity was developed for the drainable asphalt mixtures.
Publication Source (Journal or Book title)
Proceedings of the Association of Asphalt Paving Technologists
First Page
479
Last Page
500
Recommended Citation
Huang, B., Mohammad, L., Raghavendra, A., & Abadie, C. (1999). Fundamentals of permeability in asphalt mixtures. Proceedings of the Association of Asphalt Paving Technologists, 68, 479-500. Retrieved from https://repository.lsu.edu/civil_engineering_pubs/970