Effect of Short-Term Aging Process on the Moisture Susceptibility of Asphalt Mixtures and Binders Containing Sasobit Warm Mix Additive

Li, Bo; Yang, Jinyu; Li, Xiaohui; Liu, Xiang; Han, Feng; Li, Liangying

doi:10.1155/2015/425827

Cited by 19 publications

(5 citation statements)

References 14 publications

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“…Marshall testing apparatus according to ASTM D1559 [6] and Asphalt Institute MS-2 [18] was adopted to determine the B40 content for the aggregate blends. A content of 5.0% was obtained for the B40 and Q40 mix; its design properties are summarized in Table 2.…”

Section: B Mixture Design and Test Specimen Preparationmentioning

confidence: 99%

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Influence of Laboratory Aging on the Engineering Properties of Dgams Containing Two Different Iraqi Asphalts

Al-Hadidy¹,

Tan²,

Rashed³

2022

JoCEF

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The influence of laboratory aging on Marshall stability (MS), Marshall quotient (MQ), indirect tensile strength (ITS) at 25 and 60° C, tensile strength ratio (TSR), resilient modulus (MR), modulus of rupture (MOR), cohesion, and aging index (AI) of dense graded asphalt mixes (DGAMs) containing Baiji (B) and Qayyarah (Q) Iraqi asphalt was examined. The results of DGAMs containing B and Q-asphalt showed 46% and 43%, and 37% and 24% higher MS, 132% and 99%, and 111% and 78% higher MQ, 24%, and 20%, and 14% and 10% higher ITS at 25° C, 4%, and 3% and 20%, and 13% higher ITS at 60° C, 27% and 19%, and 26% and 24% higher MOR at 0° C, and 25% and 18%, and 24% and 21% higher MOR at -10° C. For 4 and 8 d aging, TSR was 11% and 7%, and 4%, and 3% higher, MR 52% and 38%, and 38% and 24% higher, cohesion 73% and 58%, and 58% and 44% higher, and AI 1.74 and 1.58, and 1.56 and 1.44 times higher, respectively.

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Section: B Mixture Design and Test Specimen Preparationmentioning

confidence: 99%

“…The performance of asphalt mixtures is greatly influenced by moisture and aging [1,[2][3][4][5][6]. Moisture damage in an asphalt mixture results adhesive or cohesive failure, or a combination of both [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of Laboratory Aging on the Engineering Properties of Dgams Containing Two Different Iraqi Asphalts

Al-Hadidy¹,

Tan²,

Rashed³

2022

JoCEF

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“…Li et al [10] studied the moisture susceptibility of asphalt mixtures and binders with Sasobit warm mix additive compared to hot mix asphalt. Aging duration and temperature affected moisture susceptibility, as shown by freeze-thaw splitting strength ratios and residual Marshall stability.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Wetfix and Nanohydrated Lime Additives on Bitumen Aging and the Cohesion and Adhesion Failure Mechanisms of Hot Asphalt Mixtures

Arabani

Abadi

Hamedi

2023

Advances in Civil Engineering

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Aging due to sunlight and the passage of time is an effective element in the occurrence of moisture damage in hot asphalt mixtures. Still, the effects of this parameter are scarcely considered in the experiments examining the moisture damage potential. Accordingly, this study investigated the effect of aging on the performance of hot asphalt mixtures and examined the improvement of moisture damage performance by using antistripping additives via mechanism and functional tests. Two types of aggregates (limestone and granite) with different degrees of moisture sensitivity, two types of bitumen (PG64-16 and PG58-22) with different performances, and two additives (Wetfix liquid additive and nanohydrated lime) as bitumen modifiers were used. Bitumen samples and asphalt mixtures were subjected to short- and long-term aging. The pull-off test was performed to explore the aging effect on different failure mechanisms (cohesion and adhesion), and the indirect tensile stiffness modulus (ITSM) test was conducted to study the asphalt mixture’s performance against moisture damage. The results specify that aging, in terms of hot asphalt mixture hardening in dry and wet conditions, decreased the MSR (resilient modulus wet to resilient modulus dry ratio), and this decline was greater in long-term aging. The pull-off test results exhibited that aging, especially in the long term, decreased the asphalt mixture’s adhesive strength in dry and wet conditions; this decline in adhesion was greater in the wet than in the dry state, and this difference decreased the wet-to-dry adhesion strength ratio (the pull-off ratio). The additives relatively improved the yield modulus of the asphalt mixture, but their effect was greater in the wet state. A comparison of the pull-off test results in cohesion and adhesion failure demonstrated that Wetfix was more effective in improving bitumen–aggregate adhesion, whereas nanohydrated lime was more effective in enhancing bitumen adhesion. The resilient modulus (Mr) ratio in wet-to-dry conditions indicated that nanohydrated lime had better effects on the overall performance of the aged asphalt mixture against moisture damage. To investigate the effect of additives on the performance of asphalt mixtures, a t-test was performed in all modes of control, short-term aging, and long-term aging. The findings showed the effect of Wetfix and nanohydrated lime on increasing the modulus of elasticity of the samples.

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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%

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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Effect of Short-Term Aging Process on the Moisture Susceptibility of Asphalt Mixtures and Binders Containing Sasobit Warm Mix Additive

Cited by 19 publications

References 14 publications

Influence of Laboratory Aging on the Engineering Properties of Dgams Containing Two Different Iraqi Asphalts

Influence of Laboratory Aging on the Engineering Properties of Dgams Containing Two Different Iraqi Asphalts

The Effect of Wetfix and Nanohydrated Lime Additives on Bitumen Aging and the Cohesion and Adhesion Failure Mechanisms of Hot Asphalt Mixtures

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

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