Effect of additives and aging on moisture-induced damage potential of asphalt mixes using surface free energy and laboratory-based performance tests

Ali, Syed Ashik; Zaman, Musharraf; Ghabchi, Rouzbeh; Rahman, Mohammad Ashiqur; Ghos, Sagar; Rani, Shivani

doi:10.1080/10298436.2020.1742335

Cited by 23 publications

(12 citation statements)

References 33 publications

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“…Aschenbrener et al used the Hamburg wheel test to evaluate the HMA with 2, 4, and 8 h of short-term aging, concluding that short-term aging could significantly increase the moisture resistance and lower the rutting depth . Similar TSR results showing the positive effect of aging could also be found in refs , − , and . However, many studies still pointed out the adverse impact of aging on moisture resistance, especially for long-term aging. − Do et al evaluated the moisture durability of HMA subjected to 1, 2, and 4 weeks of oven aging at 160 °C and found that long-term aging could reduce the moisture durability by 22–45% .…”

Section: Introductionmentioning

confidence: 99%

“…Similar TSR results showing the positive effect of aging could also be found in refs , − , and . However, many studies still pointed out the adverse impact of aging on moisture resistance, especially for long-term aging. − Do et al evaluated the moisture durability of HMA subjected to 1, 2, and 4 weeks of oven aging at 160 °C and found that long-term aging could reduce the moisture durability by 22–45% . In addition, most studies using the SFE method showed that the aging reduced the energy ratios (ERs) of asphalt–aggregate combinations, indicating the reduction in moisture resistance. − According to the study by Al Basiouni Al Masri et al, although lime contributed to the high ER values prior to aging, the ER decreased significantly after both short-term and long-term aging, indicating that the utilization of lime may not be effective in the long run.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, further evaluation is required to verify or refute this observation. Another interesting study by Ali et al suggested that the moisture resistance dropped with pressure aging vessel (PAV) and rolling thin film oven (RTFO) aging based on SFE results while the corresponding compacted mixtures showed an increase in moisture resistance . Due to the confusing results from the literature, a more in-depth and comprehensive study is required to reveal the effect of aging on the moisture durability of asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

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Moisture Damage Mechanism and Thermodynamic Properties of Hot-Mix Asphalt under Aging Conditions

Xiao

Huang

2022

ACS Sustainable Chem. Eng.

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The effect of asphalt aging on the moisture resistance of hot-mix asphalt (HMA) is still controversial and scarcely investigated. Our study is aimed at revealing the change to moisture susceptibility of HMA upon aging based on the fundamental chemistry of asphalt and laboratory performance tests. It was found that both short-term (rolling thin film oven (RTFO)) and long-term (pressure aging vessel (PAV)) aging significantly impaired the properties of asphalt and increased the debonding potential per unit contact area at the asphalt−aggregate interface. The energy ratios (ERs) of different asphalt−aggregate combinations decreased 11.60−59.68% upon aging, and long-term aging resulted in a sharper drop in ER. The reduction in moisture resistance of mixtures made by preaged asphalts could be observed primarily due to the decreased wettability of aged binders. Nevertheless, if the aging of asphalt occurred on the aggregate surface, the overall moisture resistance was also related to the contact time of asphalts and aggregates. Upon short-term aging, the wettability of asphalt associated with the coating quality was actually improved with contact time, and more asphalt could be absorbed into the pores of the aggregate. In other words, the contact area of the asphalt and aggregate continued to increase, contributing to an increased overall adhesion. In fact, the asphalt mixtures after short-term aging exhibited better moisture resistance, although the asphalt became deteriorated. However, the contact area could not further increase upon reaching the "perfect coating" while the surface free energy of asphalt continued to change with aging time. After long-term aging, the asphalts were heavily deteriorated and the stripping potential per unit area became overly high, which resulted in significant reduction in moisture resistance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Moisture Damage Mechanism and Thermodynamic Properties of Hot-Mix Asphalt under Aging Conditions

Xiao

Huang

2022

ACS Sustainable Chem. Eng.

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“…The mechanics theory takes the surface roughness and porosity of the aggregates as the research object, it analyzes the influence of the surface characteristics of aggregates on the adhesion at the micro level [12]. The surface energy theory evaluates the wetting level of asphalt on the surface of crushed stone flakes by measuring the wetting angle [13][14][15]. The surface structure theory analyzes the adhesion between aggregates and asphalt by studying the surface topographic features such as the angularity, contour, and shape of the aggregates [16,17].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Mineral Powder on the Surface/Interface of Aggregates and Asphalt

Tian¹,

Peng²,

Dong³

et al. 2021

ACSM

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This paper attempts to analyze the effect of mineral powder on the adhesion of aggregates and asphalt. First, it employs the gravimetric method to quantitatively analyze the peeling rate of asphalt and asphalt mortar from the surface of basalt, andesite, and limestone aggregates. Then, it takes microscopic pictures of the mineral powder adhered on the surface of the aggregates to observe the distribution of mineral powder in the asphalt mixtures, and uses profiles to analyze the adhesion status of mineral powder on the surface of the aggregates. At last, this paper analyzes the effect of mineral powder particles on the surface/interface of the aggregates and asphalt, and the results indicate that mineral powder has increased the roughness of the surface of the aggregates, therefore it indirectly promotes the adhesion of asphalt on the surface of the aggregates; the mineral powder particles interact with the surface texture of the aggregates, forming an embedding and wedging structure in the texture; compared with aggregates with smooth surface, the adhesion promotion effect is stronger.

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“…Some studies reported the use of graphene and graphene oxide modified asphalt ( 22 , 23 ). The use of antistripping agent (ASA) including hydrated lime and amine-based liquid ASA also effectively reduced the moisture susceptibility of asphalt mixture by increasing the polar components in asphalt binder ( 3 , 24 , 25 ). Typically, it was found that the inclusion of hydrated lime could drastically increase the TSR results ( 3 ).…”

mentioning

confidence: 99%

Mitigating Stripping in Asphalt Mixtures: Pretreatment of Aggregate by Thermoplastic Polyethylene Powder Coating

Xiao

Polaczyk

Huang

2023

Transportation Research Record: Journal of the Transportation R

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Thermoplastic polyethylene (PE) powder coating is proposed as a new technique to pretreat the aggregate of asphalt mixtures and improve the corresponding moisture resistance. In this paper, ethanol solution is investigated as a fluidized bed to disperse the PE powder. The surface tension of the solution, indicating the wettability of the liquid phase, decreases with increasing ethanol concentration and temperature. The PE powder could be stably dispersed into the solution when 15% ethanol solution heated to 40 to 50°C is used to reduce the surface tension of liquid to less than 40 mN/m. The suspension carrying the PE particles could be uniformly sprayed onto a hot aggregate surface (180–190°C) where the liquid phase evaporates fast while the PE powder melts and stays. The powder coating technique could prevent the aggregate from lumping and achieve a high-quality and efficient coating for aggregate. The PE monolayer model considering a hexagonal close packing of PE on aggregate surface is tentatively proposed to determine the theoretical amount of PE required to perfectly coat the aggregate. The predicted PE content was reasonably lower than that determined by the experimental results considering the ideal monolayer coating was hard to achieve. However, the modeling results could be used to determine the lower bound of the required PE content. The optimum PE content significantly increased with increasing particle size of PE and specific surface area of aggregate. The use of high-density polyethylene (HDPE) powder with a smaller particle size was more effective in the coating process. In addition, excessive PE could not further enhance the moisture resistance of asphalt mixtures efficiently. This study can contribute to both the recycling of waste plastic and the construction of durable asphalt pavements.

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Effect of additives and aging on moisture-induced damage potential of asphalt mixes using surface free energy and laboratory-based performance tests

Cited by 23 publications

References 33 publications

Moisture Damage Mechanism and Thermodynamic Properties of Hot-Mix Asphalt under Aging Conditions

Moisture Damage Mechanism and Thermodynamic Properties of Hot-Mix Asphalt under Aging Conditions

The Effect of Mineral Powder on the Surface/Interface of Aggregates and Asphalt

Mitigating Stripping in Asphalt Mixtures: Pretreatment of Aggregate by Thermoplastic Polyethylene Powder Coating

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