Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Laboratory Characterization of Moisture-Induced Damage Potential of Asphalt Mixes Using Conventional and Unconventional Performance-Based Tests
https://orcid.org/http://orcid.org/0000-0001-8552-3377
Moisture-induced damage is one of the major distresses responsible for premature deterioration of asphalt pavements. The stripping inflection point (SIP) from the Hamburg wheel tracking (HWT) test and tensile strength ratio (TSR) from the indirect tensile strength (ITS) test are the two most commonly used parameters by state Department of Transportation (DOT) to evaluate moisture-induced damage. However, variability in test results and poor correlations with field performance have raised concerns on the reliability of these parameters. Therefore, there is a need to identify relatively simple, reliable and mechanistic methods for evaluating moisture-induced damage potential of asphalt mixes. In this study, new approaches for evaluating the HWT test and ITS test data were introduced and compared with the conventional data analysis procedures. Also, moisture-induced damage was evaluated using a new parameter, namely J-integral ratio (Jc ratio) from Louisiana semi-circular bend (LA-SCB) test. For this purpose, surface course mixes containing warm mix asphalt additive, antistripping agent, polyphosphoric acid and reclaimed asphalt pavement (RAP) were prepared and tested in the laboratory. Bond strength of the binder-aggregate system was mechanistically quantified using surface free energy (SFE) method. Also, propensity of debonding of binder from aggregate surface in presence of moisture was determined using a similar approach. Relationships between different laboratory-based parameters and the SFE parameters were determined. Different parameters ranked mixes differently based on their failure mechanisms. Based on the results from this study and the DOT practices, the stripping number from HWT, toughness index ratio from ITS and Jc ratio from LA-SCB test exhibited potential for evaluating moisture-induced damage during the mix design phase.
Laboratory Characterization of Moisture-Induced Damage Potential of Asphalt Mixes Using Conventional and Unconventional Performance-Based Tests
https://orcid.org/http://orcid.org/0000-0001-8552-3377
Moisture-induced damage is one of the major distresses responsible for premature deterioration of asphalt pavements. The stripping inflection point (SIP) from the Hamburg wheel tracking (HWT) test and tensile strength ratio (TSR) from the indirect tensile strength (ITS) test are the two most commonly used parameters by state Department of Transportation (DOT) to evaluate moisture-induced damage. However, variability in test results and poor correlations with field performance have raised concerns on the reliability of these parameters. Therefore, there is a need to identify relatively simple, reliable and mechanistic methods for evaluating moisture-induced damage potential of asphalt mixes. In this study, new approaches for evaluating the HWT test and ITS test data were introduced and compared with the conventional data analysis procedures. Also, moisture-induced damage was evaluated using a new parameter, namely J-integral ratio (Jc ratio) from Louisiana semi-circular bend (LA-SCB) test. For this purpose, surface course mixes containing warm mix asphalt additive, antistripping agent, polyphosphoric acid and reclaimed asphalt pavement (RAP) were prepared and tested in the laboratory. Bond strength of the binder-aggregate system was mechanistically quantified using surface free energy (SFE) method. Also, propensity of debonding of binder from aggregate surface in presence of moisture was determined using a similar approach. Relationships between different laboratory-based parameters and the SFE parameters were determined. Different parameters ranked mixes differently based on their failure mechanisms. Based on the results from this study and the DOT practices, the stripping number from HWT, toughness index ratio from ITS and Jc ratio from LA-SCB test exhibited potential for evaluating moisture-induced damage during the mix design phase.
Laboratory Characterization of Moisture-Induced Damage Potential of Asphalt Mixes Using Conventional and Unconventional Performance-Based Tests
https://orcid.org/http://orcid.org/0000-0001-8552-3377
Moisture-induced damage is one of the major distresses responsible for premature deterioration of asphalt pavements. The stripping inflection point (SIP) from the Hamburg wheel tracking (HWT) test and tensile strength ratio (TSR) from the indirect tensile strength (ITS) test are the two most commonly used parameters by state Department of Transportation (DOT) to evaluate moisture-induced damage. However, variability in test results and poor correlations with field performance have raised concerns on the reliability of these parameters. Therefore, there is a need to identify relatively simple, reliable and mechanistic methods for evaluating moisture-induced damage potential of asphalt mixes. In this study, new approaches for evaluating the HWT test and ITS test data were introduced and compared with the conventional data analysis procedures. Also, moisture-induced damage was evaluated using a new parameter, namely J-integral ratio (Jc ratio) from Louisiana semi-circular bend (LA-SCB) test. For this purpose, surface course mixes containing warm mix asphalt additive, antistripping agent, polyphosphoric acid and reclaimed asphalt pavement (RAP) were prepared and tested in the laboratory. Bond strength of the binder-aggregate system was mechanistically quantified using surface free energy (SFE) method. Also, propensity of debonding of binder from aggregate surface in presence of moisture was determined using a similar approach. Relationships between different laboratory-based parameters and the SFE parameters were determined. Different parameters ranked mixes differently based on their failure mechanisms. Based on the results from this study and the DOT practices, the stripping number from HWT, toughness index ratio from ITS and Jc ratio from LA-SCB test exhibited potential for evaluating moisture-induced damage during the mix design phase.
Laboratory Characterization of Moisture-Induced Damage Potential of Asphalt Mixes Using Conventional and Unconventional Performance-Based Tests
Int. J. Pavement Res. Technol.
Ali, Syed Ashik (Autor:in) / Ghabchi, Rouzbeh (Autor:in) / Zaman, Musharraf (Autor:in) / Rahman, Mohammad Ashiqur (Autor:in) / Rani, Shivani (Autor:in)
International Journal of Pavement Research and Technology ; 15 ; 1209-1226
01.09.2022
18 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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