The Effect of a Chemical Warm Mix Additive on the Self-Healing Capability of Bitumen

Aurilio, Roberto M.; Aurilio, Mike; Baaj, Hassan

doi:10.1520/jte20210207

Cited by 8 publications

(12 citation statements)

References 16 publications

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“…The 8 mm parallel plate geometry and 2 mm gap were set in the DSR to evaluate the fatigue of RTFO + PAV-aged specimens. The temperature to undertake the standard LAS test was defined as follows: first, determine the average of low and high PG temperatures of the bitumen to be tested, second, add 4 °C to the obtained average [ 17 ]. Hence, the standard LAS test temperature was set at 25 °C.…”

Section: Methodsmentioning

confidence: 99%

“…Moreover, 25% S f , 50% S f , 75% S f , 100% S f , and 150% S f were the selected damage levels to apply the rest periods. The values for those parameters were decided considering previous experiences [ 14 , 17 ]. By setting these damage levels, it was possible to analyze the bitumen healing performance at the pre-failure, failure, and post-failure phases.…”

Section: Methodsmentioning

confidence: 99%

“…SBS-modified bitumen showed similar healing capability to neat asphalt. Aurilio et al [ 17 ] appraised the healing capacity of a WMA-modified bitumen by utilizing a simplified LASH. In this study, the authors stated that aged neat bitumen showed higher restoration capacity than that of aged WMA-modified asphalt binder.…”

Section: Introductionmentioning

confidence: 99%

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Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

Wang

et al. 2023

Materials

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Fatigue cracking is a common form of flexible pavement distress, which generally starts and spreads through bitumen. To address this issue, self-healing elastomer (SHE) modified bitumens were elaborated to assess whether these novel materials can overcome the neat asphalt (NA) fatigue performance and whether the current failure definition, failure criterion, and fatigue-restoration criteria can fit their performance. All bitumens were subjected to short-term and long-term aging. Linear amplitude sweep (LAS) test, LAS with rest period (LASH), and simplified viscoelastic-continuum-damage (S-VECD) model were utilized to appraise the behavior of the mentioned bitumens. The results showed that maximum stored pseudo-strain energy (PSE) and tau (τ) × N (number of loading cycles) failure definitions exhibited high efficiency to accommodate the fatigue life of NA and SHE-modified bitumens. Both failure criteria identified that SHE-modified bitumen (containing 1% of SHE) showed the highest increment of fatigue performance (67.1%) concerning NA. The failure criterion based on total released PSE, in terms of the area under the released PSE curve, was the only failure concept with high efficiency (R2 up to 0.999) to predict asphalt binder fatigue life. As well, the current framework to evaluate bitumen self-restoration failed to fully accommodate asphalt binder behavior, because bitumen with higher restoration could not exhibit greater fatigue performance. Consequently, a new procedure to assess this property including fatigue behavior was proposed, showing consistent results, and confirming that SHE-modified bitumen (containing 1% of SHE) exhibited the highest increment of fatigue performance (154.02%) after application of the rest period. Hence, the optimum SHE content in NA was 1%. Furthermore, it was found that a greater number of loading cycles to failure (Nf) did not ensure better fatigue performance and stored PSE influenced the bitumen fatigue behavior.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

Wang

et al. 2023

Materials

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“…Even though the technologies differ, they all seek to reduce bitumen viscosity, enhance workability, reduce emissions, and maintain the desired performance. Several studies have shown in Table 3 that these technologies can reduce air pollutants (emissions) and energy consumption [ 12 , 21 , 22 , 27 , 49 , 58 , 81 , 83 , 86 , 87 , 88 , 89 , 90 , 91 ]. Even though the low temperature for producing the mixes the production and paving has several advantages, it could result in poor performance, such as incomplete aggregate drying, poor bitumen coating, and moisture susceptibility due to the presence of water.…”

Section: Components and Production Of Asphalt Mixturementioning

confidence: 99%

“…As a result, the reduction in mixed heat is less dramatic. This closeness of temperatures results in a more extended paving season because there is more time for paving and compaction, and increased hauling distance [ 35 , 36 , 49 ]. WMA plants can be located close to urban areas because of their low levels of emissions, fumes, and noise.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Review of Hot and Warm Mix Asphalt Technologies from Environmental and Economic Perspectives: Towards a Sustainable Asphalt Pavement

Milad

Babalghaith

Al-Sabaeei

et al. 2022

IJERPH

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The environmental concerns of global warming and energy consumption are among the most severe issues and challenges facing human beings worldwide. Due to the relatively higher predicted temperatures (150–180 °C), the latest research on pavement energy consumption and carbon dioxide (CO2) emission assessment mentioned contributing to higher environmental burdens such as air pollution and global warming. However, warm-mix asphalt (WMA) was introduced by pavement researchers and the road construction industry instead of hot-mix asphalt (HMA) to reduce these environmental problems. This study aims to provide a comparative overview of WMA and HMA from environmental and economic perspectives in order to highlight the challenges, motivations, and research gaps in using WMA technology compared to HMA. It was discovered that the lower production temperature of WMA could significantly reduce the emissions of gases and fumes and thus reduce global warming. The lower production temperature also provides a healthy work environment and reduces exposure to fumes. Replacing HMA with WMA can reduce production costs because of the 20–75% lower energy consumption in WMA production. It was also released that the reduction in energy consumption is dependent on the fuel type, energy source, material heat capacity, moisture content, and production temperature. Other benefits of using WMA are enhanced asphalt mixture workability and compaction because the additives in WMA reduce asphalt binder viscosity. It also allows for the incorporation of more waste materials, such as reclaimed asphalt pavement (RAP). However, future studies are recommended on the possibility of using renewable, environmentally friendly, and cost-effective materials such as biomaterials as an alternative to conventional WMA-additives for more sustainable and green asphalt pavements.

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Viability of Coda Wave Interferometry for Fatigue Monitoring of Asphalt Mixtures

Aurilio,

Baaj

2023

Preprint

Self Cite

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For asset management, various non-destructive techniques are used to assess the structural or functional integrity of the pavements to help determine the correct maintenance and rehabilitation (M&R) treatments to prolong the useful service life of a pavement. Few studies have evaluated coupled non-invasive damage tests for asphalt materials in a laboratory setting. In this study, ultrasonic measurements were coupled with tension-compression testing using a dedicated pulse-receiver data acquisition system to characterize fatigue-healing tests. Time signals were acquired periodically (i.e., 10-minute intervals) throughout the fatigue-healing test and then analyzed in the time-domain using the coda wave interferometry (CWI) technique. Two windowing procedures were proposed, including Method 1, which incorporated a simple statistical approach and Method 2, which was derived from the diffusive energy envelope paired with an adaptive window length stretching technique. After windowing the time signals, the CWI procedure was completed using a dynamic time-warping (DTW) algorithm. CWI measurements using both windowing selection methods were demonstrated to be capable of distinguishing loading and rest periods during healing tests. The CWI technique was also sensitive enough to accurately differentiate loading at the lower and higher strain levels used in this study. Notably, Method 2 CWI results were able to maintain lower signal-signal variability and capture the “non-linearity” or curvature observed in traditional fatigue tests typically attributed to bias effects.

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The Effect of a Chemical Warm Mix Additive on the Self-Healing Capability of Bitumen

Cited by 8 publications

References 16 publications

Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

Performance Assessment of Self-Healing Polymer-Modified Bitumens by Evaluating the Suitability of Current Failure Definition, Failure Criterion, and Fatigue-Restoration Criteria

A Comparative Review of Hot and Warm Mix Asphalt Technologies from Environmental and Economic Perspectives: Towards a Sustainable Asphalt Pavement

Viability of Coda Wave Interferometry for Fatigue Monitoring of Asphalt Mixtures

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