A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cracking Resistance Characterisation of Reclaimed Asphalt
https://orcid.org/https://orcid.org/0000-0003-3639-020X
https://orcid.org/https://orcid.org/0000-0002-2703-3422
https://orcid.org/https://orcid.org/0000-0002-4539-7289
https://orcid.org/https://orcid.org/0000-0003-4376-7431
To maximise the use of reclaimed asphalt (RA), it is necessary to understand better its behaviour and more specifically its cracking properties. It is evident that the cracking resistance of mixtures containing RA will depend greatly on the ageing state of the RA binder. The aim of this chapter is to propose a new methodology based on which different RA materials are assessed in terms of their ageing state by means of their resistance to cracking. Four different RA materials are prepared into mixtures (with 100% RA), together with a reference AC 10 mixture, and their cracking resistance is evaluated by means of indirect tensile strength (ITS) testing. The suitability of the cracking tolerance index (CTindex) to characterise RA mixtures is explored. The results of this study demonstrate that the CTindex shows very low values, making it difficult to discriminate between the different ageing states. For this purpose, a new index to track the brittle behaviour of RA, namely, the cracking-based brittleness index (CBI), is proposed. CBI is a promising index with lower variability compared to the CTindex (i.e. max 21% coefficient of variation (COV) for CBI and max 50% COV for CTindex) and with higher discriminative power.
Cracking Resistance Characterisation of Reclaimed Asphalt
https://orcid.org/https://orcid.org/0000-0003-3639-020X
https://orcid.org/https://orcid.org/0000-0002-2703-3422
https://orcid.org/https://orcid.org/0000-0002-4539-7289
https://orcid.org/https://orcid.org/0000-0003-4376-7431
To maximise the use of reclaimed asphalt (RA), it is necessary to understand better its behaviour and more specifically its cracking properties. It is evident that the cracking resistance of mixtures containing RA will depend greatly on the ageing state of the RA binder. The aim of this chapter is to propose a new methodology based on which different RA materials are assessed in terms of their ageing state by means of their resistance to cracking. Four different RA materials are prepared into mixtures (with 100% RA), together with a reference AC 10 mixture, and their cracking resistance is evaluated by means of indirect tensile strength (ITS) testing. The suitability of the cracking tolerance index (CTindex) to characterise RA mixtures is explored. The results of this study demonstrate that the CTindex shows very low values, making it difficult to discriminate between the different ageing states. For this purpose, a new index to track the brittle behaviour of RA, namely, the cracking-based brittleness index (CBI), is proposed. CBI is a promising index with lower variability compared to the CTindex (i.e. max 21% coefficient of variation (COV) for CBI and max 50% COV for CTindex) and with higher discriminative power.
Cracking Resistance Characterisation of Reclaimed Asphalt
https://orcid.org/https://orcid.org/0000-0003-3639-020X
https://orcid.org/https://orcid.org/0000-0002-2703-3422
https://orcid.org/https://orcid.org/0000-0002-4539-7289
https://orcid.org/https://orcid.org/0000-0003-4376-7431
To maximise the use of reclaimed asphalt (RA), it is necessary to understand better its behaviour and more specifically its cracking properties. It is evident that the cracking resistance of mixtures containing RA will depend greatly on the ageing state of the RA binder. The aim of this chapter is to propose a new methodology based on which different RA materials are assessed in terms of their ageing state by means of their resistance to cracking. Four different RA materials are prepared into mixtures (with 100% RA), together with a reference AC 10 mixture, and their cracking resistance is evaluated by means of indirect tensile strength (ITS) testing. The suitability of the cracking tolerance index (CTindex) to characterise RA mixtures is explored. The results of this study demonstrate that the CTindex shows very low values, making it difficult to discriminate between the different ageing states. For this purpose, a new index to track the brittle behaviour of RA, namely, the cracking-based brittleness index (CBI), is proposed. CBI is a promising index with lower variability compared to the CTindex (i.e. max 21% coefficient of variation (COV) for CBI and max 50% COV for CTindex) and with higher discriminative power.
Cracking Resistance Characterisation of Reclaimed Asphalt
Carter, Alan (editor) / Vasconcelos, Kamilla (editor) / Dave, Eshan (editor) / Margaritis, Alexandros (author) / Crucho, João (author) / Tanghe, Tine (author) / Vansteenkiste, Stefan (author) / Vanelstraete, Ann (author)
International Symposium on Asphalt Pavement & Environment ; 2024 ; Montreal, QC, Canada
14th International Conference on Asphalt Pavements ISAP2024 Montreal ; Chapter: 16 ; 97-101
2024-12-24
5 pages
Article/Chapter (Book)
Electronic Resource
English
| Taylor & Francis Verlag | 2019
Cracking Resistance Evaluation of Mixtures with High Percentages of Reclaimed Asphalt Pavement
| Online Contents | 2017
Cracking Resistance Evaluation of Mixtures with High Percentages of Reclaimed Asphalt Pavement
| British Library Online Contents | 2017
Cracking Resistance Evaluation of Mixtures with High Percentages of Reclaimed Asphalt Pavement
| Online Contents | 2016