Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bond Strength Recovery of Tack Coat between Asphalt Concrete Surface and Roller-Compacted Concrete Base in Composite Pavements
https://orcid.org/http://orcid.org/0000-0002-3459-9678
https://orcid.org/http://orcid.org/0000-0003-2107-8926
https://orcid.org/http://orcid.org/0000-0002-3142-5541
A tack coat is a thin layer that ensures the bonding between an asphalt overlay and existing pavement. Adequate tack coat bonding is required for the composite pavement structure to behave as a single layer. The adhesion between the layers is significantly reduced at high temperatures, given that tack coat is characterized as a temperature-dependent material. This implies that debonding frequently occurs at elevated temperature during summer season. However, the distresses or failures related to debonding may not be occurred due to the bond strength recovery effects of the tack coat material in the early-age of the composite pavement. This study intended to investigate the bond strength recovery effect of the tack coat at the interface between the asphalt overlay and existing concrete layer based on the pull-off tests. The bond strengths measured between 18 to 20°C were 0.75 MPa and 0.81 MPa for the cationic rapid setting emulsified asphalt and modified rubberized asphalt, respectively. However, the measured bond strengths of all the specimens were 0.08 MPa or less at a high temperature of 38 to 42°C. As a result of testing the possibility of recovering the bond strength to the debonded specimens at high temperature, the bond strength of 75% or more could be recovered at the interface.
Bond Strength Recovery of Tack Coat between Asphalt Concrete Surface and Roller-Compacted Concrete Base in Composite Pavements
https://orcid.org/http://orcid.org/0000-0002-3459-9678
https://orcid.org/http://orcid.org/0000-0003-2107-8926
https://orcid.org/http://orcid.org/0000-0002-3142-5541
A tack coat is a thin layer that ensures the bonding between an asphalt overlay and existing pavement. Adequate tack coat bonding is required for the composite pavement structure to behave as a single layer. The adhesion between the layers is significantly reduced at high temperatures, given that tack coat is characterized as a temperature-dependent material. This implies that debonding frequently occurs at elevated temperature during summer season. However, the distresses or failures related to debonding may not be occurred due to the bond strength recovery effects of the tack coat material in the early-age of the composite pavement. This study intended to investigate the bond strength recovery effect of the tack coat at the interface between the asphalt overlay and existing concrete layer based on the pull-off tests. The bond strengths measured between 18 to 20°C were 0.75 MPa and 0.81 MPa for the cationic rapid setting emulsified asphalt and modified rubberized asphalt, respectively. However, the measured bond strengths of all the specimens were 0.08 MPa or less at a high temperature of 38 to 42°C. As a result of testing the possibility of recovering the bond strength to the debonded specimens at high temperature, the bond strength of 75% or more could be recovered at the interface.
Bond Strength Recovery of Tack Coat between Asphalt Concrete Surface and Roller-Compacted Concrete Base in Composite Pavements
https://orcid.org/http://orcid.org/0000-0002-3459-9678
https://orcid.org/http://orcid.org/0000-0003-2107-8926
https://orcid.org/http://orcid.org/0000-0002-3142-5541
A tack coat is a thin layer that ensures the bonding between an asphalt overlay and existing pavement. Adequate tack coat bonding is required for the composite pavement structure to behave as a single layer. The adhesion between the layers is significantly reduced at high temperatures, given that tack coat is characterized as a temperature-dependent material. This implies that debonding frequently occurs at elevated temperature during summer season. However, the distresses or failures related to debonding may not be occurred due to the bond strength recovery effects of the tack coat material in the early-age of the composite pavement. This study intended to investigate the bond strength recovery effect of the tack coat at the interface between the asphalt overlay and existing concrete layer based on the pull-off tests. The bond strengths measured between 18 to 20°C were 0.75 MPa and 0.81 MPa for the cationic rapid setting emulsified asphalt and modified rubberized asphalt, respectively. However, the measured bond strengths of all the specimens were 0.08 MPa or less at a high temperature of 38 to 42°C. As a result of testing the possibility of recovering the bond strength to the debonded specimens at high temperature, the bond strength of 75% or more could be recovered at the interface.
Bond Strength Recovery of Tack Coat between Asphalt Concrete Surface and Roller-Compacted Concrete Base in Composite Pavements
KSCE J Civ Eng
Kim, Young Kyu (Autor:in) / Rith, Makara (Autor:in) / Lee, Seung Woo (Autor:in)
KSCE Journal of Civil Engineering ; 25 ; 3750-3757
01.10.2021
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Roller Compacted Concrete Pavements
| British Library Conference Proceedings | 1991
Roller-compacted concrete pavements and concrete construction
| UB Braunschweig | 1986
Roller-compacted concrete pavements and concrete construction
| TIBKAT | 1986