Evaluation of the Impact of Asphalt Mix Segregation on Pavement Performance

Kwon, Ohhoon; Choubane, Bouzid; Hernando, David; Allick, Wayne

doi:10.1177/0361198118822812

Cited by 18 publications

(2 citation statements)

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“…To date, several studies have been conducted that demonstrate the effects of aging by varying the asphalt's mixture characteristics. Among others, the binder's performance grade, the binder's content, the aggregates, the filler, and the duration of mixing and construction have been examined for their influence in the pavement's quality [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Short-Term Aging on the Compactibility and Volumetric Properties of Asphalt Mixtures Using the Response Surface Method

et al. 2020

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Several factors affect asphalt binder and mixture characteristics. This makes pavement performance assessment a mounting task. This paper evaluates the effects of short-term aging on compactibility and volumetric properties of asphalt mixtures using the Response Surface Method (RSM). Three different binders were utilized to produce mixtures (type AC-14). Aging temperature, aging duration, and duration in a climate chamber with increased humidity and ultraviolet lighting were considered as independent variables (IV), while compactibility and volumetric properties were regarded as dependent variables (DV). The findings revealed significant impacts of aging temperature and duration on compactibility, air voids, voids in mineral aggregate, and voids filled with asphalt, while duration in the climate chamber exhibited no significant influence on the DVs. The effects of IVs on DVs varied by binder type. This was achieved through an elaborate statistical analysis. The study, finally, demonstrates the RSM’s potential to predict changes in responses from mathematical equations—converging with the experimental observation—with excellent accuracy. Potentially, pavement contractors can use this method by replacing haulage duration and mixtures’ temperatures during paving in the developed models. It enables them to predict the pavement density and adjust pressure as well as the number of roller passes to achieve the desired requirements.

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Section: Introductionmentioning

confidence: 99%

Effects of Short-Term Aging on the Compactibility and Volumetric Properties of Asphalt Mixtures Using the Response Surface Method

et al. 2020

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“…Contact Aggregate segregation in asphalt material commonly takes place in large flow situations, e.g., during truck loading, transporting, placing and paving. Without good control of these stages, inhomogeneous material properties (in terms of, e.g., air voids and stiffness) can be the consequence which, eventually, reduce the durability of pavements [1]. Practical experiences for reducing segregation potential, e.g.…”

Section: List Of Symbols F Cmentioning

confidence: 99%

Vibration-induced aggregate segregation in asphalt mixtures

2020

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Aggregate segregation in asphalt mixture is a bothersome engineering issue during pavement construction. The practitioners have some measures to mitigate the segregation potential based on experiences which, however, can only reduce the risk to a certain extent. In this research, the authors aim to contribute to the discussion in a rational non-empirical way, by using novel experimental and numerical techniques. A case study is carried out to investigate the vibration-induced segregation in asphalt mixtures, corresponding to the circumstance arising during material transportation to the construction site. A novel experimental test is conducted for evaluating the segregation characteristics of asphalt mixtures under vertical vibration in laboratory conditions. A numerical investigation based on discrete element method is further performed to study the phenomenon from a micromechanical point of view. The obtained experimental and numerical results indicate that vibratory loading induces aggregate size segregation in asphalt mixtures, and the degree of segregation is influenced profoundly by the adhesive properties of bituminous binders and the aggregate gradation.

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