The application of cold recycling mixtures has been used for decades, and several research projects have been done on cold recycled materials. Given the variety of mixture applications and the complex behaviour of cold recycled mixtures (CRM), there has been an interest among researchers to investigate the performance of these mixtures in different conditions. Therefore, there has been discoverable aspects of CRM behaviour to be investigated. For instance, cracking in asphalt pavement is a controversial problem that has been studied by researchers around the world. However, there is not a commonly accepted protocol for testing asphalt mixtures for cracking resistance characterization because of variability of test results, nonuniformity in test specimens, and overall complexities of the tests that prevent them from being adopted for daily uses. Considering the behaviour of CRM which is somehow between granular materials and hot mix asphalt (HMA), it is highly significant to better understand its performance and the failure mechanism of these materials. Cracking resistance as an influential parameter to evaluate the performance of CRM studied here. This parameter was investigated through the research by simulating various field conditions including different temperatures and different aging in order to build foundations for performance prediction commonly used in asphalt pavement design procedures. Semi-Circular Bending (SCB) test was selected as a commonly used laboratory test to characterize crack resistance of asphalt mixtures. Besides, Indirect Tensile Strength (IDT) was employed to evaluate moisture sensitivity of mixes. The proposed mixes in this study include three mix designs with different binder content. The tests were conducted in three stages of aging which simulated using a draft oven in the laboratory and three different temperatures. Addressing these problems will help to improve mixture design procedures and optimize quality control and quality assurance of asphalt mixes, especially when complicated components, such as recycled materials are commonly incorporated into asphalt concrete nowadays.
| Date | 19 Sept 2022 |
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| Original language | American English |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Alan Carter (Supervisor) |
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Beheshtighanad, M. (Author),
Carter (Supervisor),
19 Sept 2022Student thesis: Master's thesis › Master in Engineering: Construction Engineering