A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analysis of Internal Pore Structure of Porous Asphalt Concrete Using X-ray Computed Tomography Images
In most paving applications in Kerala, dense-graded mixes are used for roadway and parking lot surface, which is impermeable, and rainwater flows over the pavement surface and drains along the side of the roads. A porous asphalt (PA) pavement is a kind of Hot Mix Asphalt (HMA) that contains interconnecting air gaps. This research aims to examine the internal pore structure of the porous asphalt concrete specimen through laboratory experiments and post-processing of X-ray computed tomography (CT) images. The study is also intended to determine the anisotropy of pore characteristics in the horizontal and vertical direction with the absence and presence of clogging material (collected from the sides of the urban roads). Scanned images have been processed to analyze the various parameters such as void area ratio (porosity), size of the voids, percolation number, and tortuosity. Results show that the porous asphalt concrete has an anisotropic pore structure and the obtained porosity value through image analysis matches reasonably with laboratory test results. The porosity in the vertical slices, which facilitates the horizontal flow, is more significant than in the horizontal slices, which facilitate the vertical flow. Moreover, the porosity is reduced by 6.92% in horizontal slices and 1.91% in vertical slices due to the presence of clogging materials.
Analysis of Internal Pore Structure of Porous Asphalt Concrete Using X-ray Computed Tomography Images
In most paving applications in Kerala, dense-graded mixes are used for roadway and parking lot surface, which is impermeable, and rainwater flows over the pavement surface and drains along the side of the roads. A porous asphalt (PA) pavement is a kind of Hot Mix Asphalt (HMA) that contains interconnecting air gaps. This research aims to examine the internal pore structure of the porous asphalt concrete specimen through laboratory experiments and post-processing of X-ray computed tomography (CT) images. The study is also intended to determine the anisotropy of pore characteristics in the horizontal and vertical direction with the absence and presence of clogging material (collected from the sides of the urban roads). Scanned images have been processed to analyze the various parameters such as void area ratio (porosity), size of the voids, percolation number, and tortuosity. Results show that the porous asphalt concrete has an anisotropic pore structure and the obtained porosity value through image analysis matches reasonably with laboratory test results. The porosity in the vertical slices, which facilitates the horizontal flow, is more significant than in the horizontal slices, which facilitate the vertical flow. Moreover, the porosity is reduced by 6.92% in horizontal slices and 1.91% in vertical slices due to the presence of clogging materials.
Analysis of Internal Pore Structure of Porous Asphalt Concrete Using X-ray Computed Tomography Images
Lecture Notes in Civil Engineering
Rastogi, Rajat (editor) / Bharath, G. (editor) / Singh, Dharamveer (editor) / Jegan Bharath Kumar, A. (author) / Ganeshvijay, R. (author) / Murshida, P. (author) / Rajasekar, R. (author)
International Conference on Transportation Infrastructure Projects : Conception to Execution ; 2022 ; Haridwar, India
2023-07-22
11 pages
Article/Chapter (Book)
Electronic Resource
English
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