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http://dx.doi.org/10.5762/KAIS.2021.22.3.611

Effect of Maximum Aggregate, Porosity, and Temperature on Crack Resistance and Moisture Susceptibility of Porous Asphalt Mixtures  

Yoo, In-Kyoon (Department of Infrastructure Safety Research, Korea Institute of Civil and Building Technology)
Lee, Su-Hyung (Department of Infrastructure Safety Research, Korea Institute of Civil and Building Technology)
Park, Ki-Soo (Department of Infrastructure Safety Research, Korea Institute of Civil and Building Technology)
Yoon, Kang-Hoon (Research Committee, Korea Professional Engineers Association)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.22, no.3, 2021 , pp. 611-619 More about this Journal
Abstract
Porous asphalt pavement (PAP) has many functions, such as reducing accidents and decreasing noise. On the other hand, vulnerability is inevitable because PAP contains approximately 20% porosity. This study evaluated the effects of the maximum aggregate size (MAS), temperature, and porosity on the PAP durability. The indirect tensile strength measures durability. This study tested the samples that stayed dry and were moisturized by freezing and thawing for mixtures having the same porosity of 20% and MAS of 13mm, 10mm, and 8mm. The same test was performed on a mixture of 20% and 22% voids made of the same material with a MAS of 10mm. As a result, for 20% porosity, significant differences in the changes in MAS and temperature were found. A clear difference was observed between 8mm and 13mm under dry conditions, but there were no other significant differences in the MAS change. Furthermore, there was a clear difference in temperature for the change in porosity and temperature, but the gap in 2% porosity at 20% did not show a clear difference. Therefore, it is necessary to develop a more durable PAP through quantitative evaluations of the factors affecting the PAP durability.
Keywords
Porous Asphalt Mixture; Durability; Indirect Tensile Strength Test; Maximum Aggregate Size; Statistical Analysis;
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