Developing a sustainable, post treated, half warm mix asphalt for structural surface layer

Kadhim, Mustafa Amoori; Al-Busaltan, Shakir; Dulaimi, Anmar; Sadique, Monower; Nageim, Hassan Al; Al-Kafaji, Muna; Al-Yasari, Rand

doi:10.1016/j.conbuildmat.2022.127926

Cited by 10 publications

(7 citation statements)

References 57 publications

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“…However, later research showed that part of dissipated energy occurs due to plastic deformation and heat generation [53][54][55]. Therefore, the researchers presented RDEC to evaluate the fatigue properties of asphalt mixtures according to Equation (12).…”

Section: Fatigue Resistance Resultsmentioning

confidence: 99%

“…Hence, it provides a complete definition of the fatigue characteristics of asphalt mixtures [40,53,56]. According to the mentioned definition, the amount of PV is determined by Equation (12), where PV is the plateau value, N f 50 is the fatigue life of asphalt mixture corresponding to a 50% reduction in initial stiffness, K represents the slope of dissipated energy curve versus the load cycle.…”

Section: Fatigue Resistance Resultsmentioning

confidence: 99%

“…These negative environmental effects will result in global warming [10]. In recent years, many efforts have been made to develop asphalt mixtures using green technologies, which have decreased the negative points of HMA by reducing its temperature during production and compaction [11,12]. One of these measures is the production of low-energy asphalt (LEA), which is a component of half-warm mix asphalt with a temperature range of 80-100°C [13].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Rutting, Fatigue, and Moisture Resistance of Low-Energy Asphalt Mixtures Modified by Crumb Rubber

Moghimi,

Shafabakhsh,

Divandari

2023

Advances in Civil Engineering

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Low-energy asphalt (LEA) mixture, as an alternative to hot mix asphalt (HMA) due to its lower mixing temperature, has advantages such as reducing energy consumption and environmental pollutants. LEA has poor performance characteristics due to the presence of water in its manufacturing process and low mixing temperature. All the studies about LEA have been focused only on investigating the performance of this asphalt mixture, and the effect of additives in its modification is one of the research gaps in this field. Therefore, the use of crumb rubber (CR) and determining its optimal percentage in modifying the performance characteristics of LEA is considered an innovation of this research. In this research, the performance characteristics of LEA modified by 10%, 15%, and 20% CR were evaluated. In order to examine the rutting behavior, moisture sensitivity and fatigue resistance, dynamic creep, indirect tensile strength (ITS), and four-point bending beam tests were applied, respectively. The results of creep curves and flow numbers (FNs) indicated that modifying LEA by 15% increased the rutting resistance by 1.92 and 2.3 times, respectively, compared to the HMA specimen at the stress level of 207 and 310 kPa. Moreover, the evaluation of the creep strain slope revealed that modifying LEA significantly reduced stress sensitivity. ITS test showed an increase in tensile strength ratio by 22% in the specimen with 10% CR compared to the unmodified specimen. In the evaluation of fatigue resistance, while LEA containing 10% CR had almost similar results to the HMA specimen, other specimens represented a shorter fatigue life, so that with the increase in CR percentage, the fatigue life decreased. Determination of fatigue life by energy ratio and Rowe and Bouldin criteria showed similar results. Finally, by determining the plateau value (PV) in the ratio of the dissipated energy change method, the lowest PV was assigned to the 10% CR-modified LEA and HMA specimens, respectively.

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Section: Fatigue Resistance Resultsmentioning

confidence: 99%

Section: Fatigue Resistance Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of Rutting, Fatigue, and Moisture Resistance of Low-Energy Asphalt Mixtures Modified by Crumb Rubber

Moghimi,

Shafabakhsh,

Divandari

2023

Advances in Civil Engineering

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“…Another type of warm asphalt technology is half-hot mix asphalt (HWMA). While the production temperature of WMA mixes is in the range of 100-150 • C, HWMA technology permits asphalt pavement production at a reduction temperature of less than 100 • C [70,71]. HWMA technology employs chemical additives and foaming processes to minimize HMA mixing and compaction temperatures [70].…”

Section: Mixing and Production Technologymentioning

confidence: 99%

“…While the production temperature of WMA mixes is in the range of 100-150 • C, HWMA technology permits asphalt pavement production at a reduction temperature of less than 100 • C [70,71]. HWMA technology employs chemical additives and foaming processes to minimize HMA mixing and compaction temperatures [70]. This method has been found to decrease energy usage and greenhouse gas emissions during the manufacturing process.…”

Section: Mixing and Production Technologymentioning

confidence: 99%

A Comprehensive Overview of the Utilization of Recycled Waste Materials and Technologies in Asphalt Pavements: Towards Environmental and Sustainable Low-Carbon Roads

Yaro,

Sutanto,

Baloo

et al. 2023

Processes

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Given the prevailing concerns about greenhouse gas emissions, global warming, and the growing demand for renewable resources, the pavement industry, among others, is actively engaged in researching and exploring low-carbon materials and technologies. Despite the growing interest in low-carbon asphalt pavement, there is still a significant knowledge gap regarding the use of various waste materials and technologies to achieve this goal. This study aims to close this gap by conducting a systematic review and scientometric assessment of the existing studies on the use of waste materials and technologies for low-carbon asphalt pavement. The study spans the years 2008 to 2023, and the scientometric analysis was conducted using the VOS viewer application. The study identifies materials and technologies in this area by examining co-authored country studies, publication sources, and keyword co-occurrence. It should be noted that a limited number of waste materials that allow CO2 emissions reduction was analyzed in this study. However, other waste categories, such as bio-oils and polymers, which can provide positive either environmental or economic impacts on the production of paving materials, were not considered in the scope of the study. Based on the current review, it was found that integrating recycled waste materials like recycled asphalt pavement, biochar, or crumb rubber with alternative mixing technologies such as warm mix asphalt and cleaner energy can significantly reduce CO2 emissions. China and the United States were identified as key research contributors to the low-carbon pavement. Furthermore, biomass-based fuel and electric construction equipment lower carbon and greenhouse gas emissions by 36–90% and 67–95%, respectively. However, before various recycled waste materials and technologies can be widely used in the asphalt industry, various challenges need to be addressed, including cost concerns, performance and durability concerns, standardization and regulations, availability, integration with existing facilities, and insufficient field and long-term data. The review identified critical research gaps, such as the absence of a homogeneous and reliable standard method for low-carbon asphalt pavement, limited field performance data, and a life cycle assessment approach in analyzing the emission reduction effects. The reviews will aid in the paradigm shift to a more carbon-friendly pavement industry that uses recycled waste materials and technologies.

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Industrial Wastewater Sludge Management: Milestones and Challenges

Sandoval,

Domínguez-Jaimes

2024

Environmental Engineering and Waste Management

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Developing a sustainable, post treated, half warm mix asphalt for structural surface layer

Cited by 10 publications

References 57 publications

Evaluation of Rutting, Fatigue, and Moisture Resistance of Low-Energy Asphalt Mixtures Modified by Crumb Rubber

Evaluation of Rutting, Fatigue, and Moisture Resistance of Low-Energy Asphalt Mixtures Modified by Crumb Rubber

A Comprehensive Overview of the Utilization of Recycled Waste Materials and Technologies in Asphalt Pavements: Towards Environmental and Sustainable Low-Carbon Roads

Industrial Wastewater Sludge Management: Milestones and Challenges

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