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A platform for research: civil engineering, architecture and urbanism
Investigating the asphalt binder/mastic bonding healing behavior using bitumen bonding strength test and X-ray Computed Tomography scan
https://orcid.org/0000-0001-6452-4127
https://orcid.org/0000-0001-5155-3076
Highlights Asphalt healing behavior in terms of bonding properties were studied. CT scan was used to describe the macro healing process inside the asphalt material. Bonding healing is a long-stand behavior after multiple bonding failures. Water and polymer modification weakens the asphalt bonding healing potential. Mastics exhibits better healing properties than binders at all healing conditions.
Abstract Healing behavior of asphalt is crucial to the engineering performance of asphalt pavement and helps with extended service life. Therefore, the healing behavior of asphalt material has been widely investigated by extensive researchers. However, most studies focused on the evolution in asphalt modulus/stiffness and less attention was paid to the healing behavior in asphalt bonding properties. Even fewer researchers have discussed this topic at an asphalt mastic level. This study aims to evaluate the bonding healing behavior between the asphalt/aggregate interface using the bitumen bonding strength (BBS) test. Both asphalt binder and asphalt mastic were investigated. Numerous variables including healing time, healing temperature, presence of water, polymer modification and multiple healing cycles were discussed. Additionally, non-destructive X-ray Computed Tomography (CT) scan was conducted to visually confirm the macro healing process inside the asphalt material. Results suggest that bonding healing is a long-stand behavior, but after multiple fracture-healing cycles, the ultimate healing capability is quite low, especially for Styrene-Butadiene-Styrene polymer modified asphalt. Mastic samples exhibited improved healing properties than binder samples at all healing conditions. At a reasonable high curing temperature of 40 °C, base asphalt mastic shows nearly 100% recovery rate. Based on CT scan test, water and polymer modification weakens the asphalt healing ability while extended healing time and increased temperature is beneficial.
Investigating the asphalt binder/mastic bonding healing behavior using bitumen bonding strength test and X-ray Computed Tomography scan
https://orcid.org/0000-0001-6452-4127
https://orcid.org/0000-0001-5155-3076
Highlights Asphalt healing behavior in terms of bonding properties were studied. CT scan was used to describe the macro healing process inside the asphalt material. Bonding healing is a long-stand behavior after multiple bonding failures. Water and polymer modification weakens the asphalt bonding healing potential. Mastics exhibits better healing properties than binders at all healing conditions.
Abstract Healing behavior of asphalt is crucial to the engineering performance of asphalt pavement and helps with extended service life. Therefore, the healing behavior of asphalt material has been widely investigated by extensive researchers. However, most studies focused on the evolution in asphalt modulus/stiffness and less attention was paid to the healing behavior in asphalt bonding properties. Even fewer researchers have discussed this topic at an asphalt mastic level. This study aims to evaluate the bonding healing behavior between the asphalt/aggregate interface using the bitumen bonding strength (BBS) test. Both asphalt binder and asphalt mastic were investigated. Numerous variables including healing time, healing temperature, presence of water, polymer modification and multiple healing cycles were discussed. Additionally, non-destructive X-ray Computed Tomography (CT) scan was conducted to visually confirm the macro healing process inside the asphalt material. Results suggest that bonding healing is a long-stand behavior, but after multiple fracture-healing cycles, the ultimate healing capability is quite low, especially for Styrene-Butadiene-Styrene polymer modified asphalt. Mastic samples exhibited improved healing properties than binder samples at all healing conditions. At a reasonable high curing temperature of 40 °C, base asphalt mastic shows nearly 100% recovery rate. Based on CT scan test, water and polymer modification weakens the asphalt healing ability while extended healing time and increased temperature is beneficial.
Investigating the asphalt binder/mastic bonding healing behavior using bitumen bonding strength test and X-ray Computed Tomography scan
https://orcid.org/0000-0001-6452-4127
https://orcid.org/0000-0001-5155-3076
Highlights Asphalt healing behavior in terms of bonding properties were studied. CT scan was used to describe the macro healing process inside the asphalt material. Bonding healing is a long-stand behavior after multiple bonding failures. Water and polymer modification weakens the asphalt bonding healing potential. Mastics exhibits better healing properties than binders at all healing conditions.
Abstract Healing behavior of asphalt is crucial to the engineering performance of asphalt pavement and helps with extended service life. Therefore, the healing behavior of asphalt material has been widely investigated by extensive researchers. However, most studies focused on the evolution in asphalt modulus/stiffness and less attention was paid to the healing behavior in asphalt bonding properties. Even fewer researchers have discussed this topic at an asphalt mastic level. This study aims to evaluate the bonding healing behavior between the asphalt/aggregate interface using the bitumen bonding strength (BBS) test. Both asphalt binder and asphalt mastic were investigated. Numerous variables including healing time, healing temperature, presence of water, polymer modification and multiple healing cycles were discussed. Additionally, non-destructive X-ray Computed Tomography (CT) scan was conducted to visually confirm the macro healing process inside the asphalt material. Results suggest that bonding healing is a long-stand behavior, but after multiple fracture-healing cycles, the ultimate healing capability is quite low, especially for Styrene-Butadiene-Styrene polymer modified asphalt. Mastic samples exhibited improved healing properties than binder samples at all healing conditions. At a reasonable high curing temperature of 40 °C, base asphalt mastic shows nearly 100% recovery rate. Based on CT scan test, water and polymer modification weakens the asphalt healing ability while extended healing time and increased temperature is beneficial.
Investigating the asphalt binder/mastic bonding healing behavior using bitumen bonding strength test and X-ray Computed Tomography scan
Lv, Quan (author) / Huang, Weidong (author) / Zheng, Mao (author) / Hao, Gengren (author) / Yan, Chuanqi (author) / Sun, Lijun (author)
2020-05-08
Article (Journal)
Electronic Resource
English
Asphalt binder , Asphalt mastic , Bonding , Healing , BBS test , CT scan
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