A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fracture Failure Evaluation of Foam WMA Mixes Containing RAP by Applying Weibull Probability Distribution Function
https://orcid.org/http://orcid.org/0000-0001-8304-6271
Will reclaimed asphalt pavement (RAP) be used more in pavements in the future? This is why researchers tended toward investigating high-RAP mixes. Hence, evaluating the fracture resistance of warm mix asphalt (WMA) mixes containing various RAP contents was chosen as the aim of this research. The first step was to determine the optimum binder contents and the required mixing temperatures. The optimized mixes were compacted and were tested under fracture in semi-circular bending (SCB) test. The SCB specimens were tested in fracture opening mode at temperatures varying from 25 to – 20 °C and after exposure to freeze–thaw cycles. The role of RAP materials in WMA mixes was investigated, assessing crack evolution criteria at different condition regimes. Analytical indices and the R-curve method were employed in investigating the experimental results. Moreover, the possibility of cracking failure was determined through the Weibull probability distribution function. The desirability value that was defined to represent the degree of agreement between the criteria of the optimized mixes and predefined goals, showed that mixes with 30% RAP were the most desirable. As the RAP content increased lower desirability values were recorded. R-curves showed that the foam WMA mixes containing 30% of RAP were the most resistant mixes against fracture failure. At the same time, Weibull analysis showed that greater RAP contents resulted in increased cracking in WMA mixes, while the inclusion of 30% RAP resulted in the most desirable mixes.
Fracture Failure Evaluation of Foam WMA Mixes Containing RAP by Applying Weibull Probability Distribution Function
https://orcid.org/http://orcid.org/0000-0001-8304-6271
Will reclaimed asphalt pavement (RAP) be used more in pavements in the future? This is why researchers tended toward investigating high-RAP mixes. Hence, evaluating the fracture resistance of warm mix asphalt (WMA) mixes containing various RAP contents was chosen as the aim of this research. The first step was to determine the optimum binder contents and the required mixing temperatures. The optimized mixes were compacted and were tested under fracture in semi-circular bending (SCB) test. The SCB specimens were tested in fracture opening mode at temperatures varying from 25 to – 20 °C and after exposure to freeze–thaw cycles. The role of RAP materials in WMA mixes was investigated, assessing crack evolution criteria at different condition regimes. Analytical indices and the R-curve method were employed in investigating the experimental results. Moreover, the possibility of cracking failure was determined through the Weibull probability distribution function. The desirability value that was defined to represent the degree of agreement between the criteria of the optimized mixes and predefined goals, showed that mixes with 30% RAP were the most desirable. As the RAP content increased lower desirability values were recorded. R-curves showed that the foam WMA mixes containing 30% of RAP were the most resistant mixes against fracture failure. At the same time, Weibull analysis showed that greater RAP contents resulted in increased cracking in WMA mixes, while the inclusion of 30% RAP resulted in the most desirable mixes.
Fracture Failure Evaluation of Foam WMA Mixes Containing RAP by Applying Weibull Probability Distribution Function
https://orcid.org/http://orcid.org/0000-0001-8304-6271
Will reclaimed asphalt pavement (RAP) be used more in pavements in the future? This is why researchers tended toward investigating high-RAP mixes. Hence, evaluating the fracture resistance of warm mix asphalt (WMA) mixes containing various RAP contents was chosen as the aim of this research. The first step was to determine the optimum binder contents and the required mixing temperatures. The optimized mixes were compacted and were tested under fracture in semi-circular bending (SCB) test. The SCB specimens were tested in fracture opening mode at temperatures varying from 25 to – 20 °C and after exposure to freeze–thaw cycles. The role of RAP materials in WMA mixes was investigated, assessing crack evolution criteria at different condition regimes. Analytical indices and the R-curve method were employed in investigating the experimental results. Moreover, the possibility of cracking failure was determined through the Weibull probability distribution function. The desirability value that was defined to represent the degree of agreement between the criteria of the optimized mixes and predefined goals, showed that mixes with 30% RAP were the most desirable. As the RAP content increased lower desirability values were recorded. R-curves showed that the foam WMA mixes containing 30% of RAP were the most resistant mixes against fracture failure. At the same time, Weibull analysis showed that greater RAP contents resulted in increased cracking in WMA mixes, while the inclusion of 30% RAP resulted in the most desirable mixes.
Fracture Failure Evaluation of Foam WMA Mixes Containing RAP by Applying Weibull Probability Distribution Function
Int. J. Pavement Res. Technol.
Kavussi, Amir (author) / Motevalizadeh, Seyed Mohsen (author)
International Journal of Pavement Research and Technology ; 15 ; 1277-1296
2022-11-01
20 pages
Article (Journal)
Electronic Resource
English
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