Evaluation of moisture susceptibility of asphalt mixes containing RAP and different types of aggregates and asphalt binders using the surface free energy method

Ghabchi, Rouzbeh; Singh, Dharamveer; Zaman, Musharraf

doi:10.1016/j.conbuildmat.2014.09.042

Cited by 100 publications

(16 citation statements)

References 11 publications

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“…This study focused on assessment of surface energy and moisture sensitivity of wide compounds of bitumen and aggregates. Moisture damage analysis used in this study was based on dynamic mechanical analysis which was used in some previous studies [29].…”

Section: Literature Reviewmentioning

confidence: 99%

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Jajin

Hamedi

2018

CivileJournal

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Moisture damage in asphaltic mixtures is defined by the loss of durability and resistance caused by the effect of moisture. The most common way to improve moisture damage in asphaltic mixtures is to use anti-strip additives. This study tended to use dry resin polymer additive to make a moisture-resistant asphaltic mixture. Two types of aggregate indicating different sensitivities against moisture were studied. In order to compare the effect of this material with other anti-strip additives, this study evaluated the effect of hydrated lime on reducing moisture damage and comparing its effect with dry resin polymer additive. The effect of these materials was evaluated by mechanical and thermodynamic concepts using indirect tensile ratio and surface free energy. The results indicated that dry resin polymer used in this study increased alkaline content and reduced acidic content of bituminous surface free energy, resulting in more adhesion between acidic aggregates which are more sensitive to resistance. It also improved bitumen-aggregate adhesion and reduced strip rate. Moreover, hydrated lime as an aggregate anti-strip agent and dry resin polymer as a bituminous modifier significantly increased the resistance of warm asphalt mixtures against moisture. The results of this study show that dry resin polymer can be used as an anti-strip agent instead of hydrated lime with operational problems.

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Section: Literature Reviewmentioning

confidence: 99%

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Jajin

Hamedi

2018

CivileJournal

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“…Several types of liquids with known SFE components were selected as probe liquids for measuring the surface-free energy of the asphalt binders on the basis of previous studies [43][44][45].…”

Section: Surface Free Energy (Sfe) Testsmentioning

confidence: 99%

Effect of Nanoclays on Moisture Susceptibility of SBS-Modified Asphalt Binder

Wang

Guo

Yang

et al. 2020

Advances in Materials Science and Engineering

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Moisture susceptibility plays an important role in the damage of asphalt pavement. Failure occurs when asphalt is removed from the aggregate particles due to the decreased adhesion between the asphalt and aggregate in comparison with that between water and the aggregate. In recent years, efforts utilizing nanomaterials to improve the diverse properties of asphalt have proven to be effective. In this study, three types of nanoclays were used to modify styrene-butadiene-styrene- (SBS-) modified asphalt. The resistances to water damage of the modified binders were evaluated using the surface free energy (SFE) and atomic force microscopy (AFM). The results revealed that the total SFE decreased and the energy ratio (ER) increased when the asphalt binder was modified with the nanoclays, indicating that the addition of nanoclays can improve the moisture resistance of these aggregate-binder systems. After immersion, a decreased amount of bee structures was observed in both the SBS and nanoclay-modified asphalts due to the interactions between water and bitumen. However, the residual amount of bee structures was higher in the nanoclay-modified asphalts than in the SBS-modified asphalt, indicating that the addition of nanoclay makes the surface morphology of asphalt more resistant to water damage. Finally, freeze-thaw splitting tests were used to verify the results obtained through the SFE and AFM tests.

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“…For example, Bhasin used surface free energy methods to quantify the interfacial adhesion between asphalt binder and mineral aggregates, and analyze the effect of water on loss of adhesion [6]. Ghabchi et al used the same approach to evaluate the moisture susceptibility of asphalt mixes containing RAP [13]. Tan and Guo used the surface free energy method to study the cohesion and adhesion of asphalt mastic, and explored the influence of filler types and moisture [14].…”

Section: Background and Motivationsmentioning

confidence: 99%

Investigating the interaction between asphalt binder and fresh and simulated RAP aggregate

et al. 2016

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Although the role of individual ingredients of hot mix asphalt (HMA) such as asphalt binder and aggregates on its performance is readily recognized, there is only limited understanding about the interactions between these components and the properties of binder-aggregate interface. In order to study the interactions between asphalt binder and mineral aggregates, an interfacial test method was developed and its effectiveness was evaluated. Interfacial interactions were evaluated by testing thin films of an asphalt binder interfaced with the surface of aggregates under two different modes of loading in shear: sinusoidal oscillation and monotonically increasing. An Interaction Parameter (IP) was proposed to quantify the binder-aggregate interfacial effects. The results show that the methodology used in this study can quantify the effects of interaction between the asphalt binder and mineral aggregates. Furthermore, this research also investigated the interaction of an asphalt binder with the surface of simulated reclaimed asphalt pavement (RAP) aggregates. The results from this research not only provide an insight to the effects of binder-aggregate interaction, but can also help practitioners to better understand the effect of mixing conditions on the properties of mixtures produced using different materials.

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Evaluation of moisture susceptibility of asphalt mixes containing RAP and different types of aggregates and asphalt binders using the surface free energy method

Cited by 100 publications

References 11 publications

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Examining the Effect of Dry Resin on Moisture Sensitivity of Asphaltic Mixtures

Effect of Nanoclays on Moisture Susceptibility of SBS-Modified Asphalt Binder

Investigating the interaction between asphalt binder and fresh and simulated RAP aggregate

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