Asphalt-rubber gap-graded mixture design practices: a state-of-the-art research review and future perspective

Venudharan, Veena; Biligiri, Krishna Prapoorna; Sousa, Jorge B.; Way, George B.

doi:10.1080/14680629.2016.1182060

Cited by 72 publications

(22 citation statements)

References 64 publications

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“…In regards to the effect of aggregate skeleton on mixture characteristic, several studies were conducted to understand the performance of the AR mixture with varying gradations including dense and gap graded (Way et al, 2012;Huang et al, 2002;Wang et al, 2013). Based on a state-of-the-art research review prepared by (Venudharan et al, 2016) many researches have used dense-graded gradation in order to investigate the enhanced performance. Most of the researchers found that rubber modification improved the performance comparing with conventional dense-graded.…”

Section: Literature Reviewmentioning

confidence: 99%

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The Effects of Using Crumb Rubber Modified Binder in an Asphalt Pavement

Soleimani¹,

Faheiman²,

Mowaze³

2020

American Journal of Engineering and Applied Sciences

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In this study, laboratory investigations have been carried out to characterize and demonstrate the improved performance of asphalt after modifying it with crumb rubber. The study has been divided into two main parts. Firstly, the physical characterizations of crumb rubber modified bitumen with different percentages of crumb rubber have been evaluated using penetration, softening point, viscosity, ductility and thin film oven tests. In the second part, Marshall Mix design has been performed for both asphalt rubber and control asphalt. After finding the optimum mix for both of them, Marshall and indirect tensile tests have been performed on both moisture-conditioned and-unconditioned cases to assess their performance in terms of stability, deformation, tensile strength and the effect of moisture on paving mixtures. Control asphalt samples have been prepared for the purpose of comparison. These laboratory investigations have been intended to evaluate utilizing crumb rubber in dense graded asphalt mixtures. Previous studies have shown that gap graded and dense graded asphalt rubber mixes performed better somehow than their respective conventional asphalt mixes. In addition, in Kuwait, gap graded mix is only used for chip seal while dense graded asphalt mix is used for main pavement layers such as wearing course and most of the pavement failures happen in this layer. The comparison between the experimental results of asphalt rubber and conventional asphalt showed that asphalt rubber is significantly better than conventional asphalt in terms of rutting and shear resistance as well as stability.

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Section: Literature Reviewmentioning

confidence: 99%

“…In sum, it is evident that asphalt-rubber is relatively simple to make given the appropriate equipment and training. This has led to its widespread use in many countries, including but not limited to the USA, Portugal, Spain, Italy, Brazil, Russia, Sweden and China (Kaloush, 2014;Way et al, 2012;Venudharan et al, 2016).…”

Section: Literature Reviewmentioning

confidence: 99%

The Effects of Using Crumb Rubber Modified Binder in an Asphalt Pavement

Soleimani¹,

Faheiman²,

Mowaze³

2020

American Journal of Engineering and Applied Sciences

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“…Globally, ever-increasing traffic and growing axle loads have urged engineers and practitioners to use and adopt unconventional asphalt materials for the improvement of pavement performance [1][2][3][4]. Crumb rubber (CR), which is used as a modifier for asphalt, has been proven to endow asphalt with improved properties, i.e., better rutting resistance, fatigue resistance, water stability, antireflective cracking ability, and decreased road costs [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A New Type of Crumb Rubber Asphalt Mixture: A Dry Process Design and Performance Evaluation

Dai

et al. 2020

Applied Sciences

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To obtain a crumb rubber asphalt mixture with excellent performance, this study combined trans-polyoctenamer rubber (TOR), crumb rubber, and other additives to establish a new type of crumb rubber (CRT). The objective of this study was to design and evaluate the road performance of the new type of crumb rubber asphalt mixture (CRTAM) with a skeleton dense texture through a dry process. First, the skeleton intrusion compact volume method was used to optimize the grading of coarse and fine aggregates, and the design of the CRTAM gradation was carried out through the same and unequal volume replacement grading method. Then, three types of road performance were analyzed: high-temperature stability, low-temperature crack resistance, and water stability. The results showed that 2% and 2.5% CRT met a low-temperature index with equal volume substitution, and the six gradations obtained by unequal volume replacement with 2% CRT complied with the requirements of a skeleton dense texture. When the substitution ratio was 1.5 and 0.5, the high-temperature performance was better. In addition, when the substitution ratio was 0.5, the flexural strain energy density was the highest and the low-temperature performance was the best. Including considerations of economic benefits, it is recommended that the CRT content be 2% and the substitution ratio be 0.5.

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“…Many studies have confirmed that asphalt binders modified with crumb rubber have higher viscosity compared to that of virgin asphalt binder. In addition, CRM is beneficial in terms of rutting resistance, moisture susceptibility, and low temperature cracking of asphalt binder and asphalt mixture [12,13,14,15]. As a result, the final pavement performance of asphalt mixture prepared using CRM asphalt binder can increase the pavement service life, reduce reflection cracking, decrease traffic noise, reduce maintenance cost, decrease pollution, and is very important for protecting the environment.…”

Section: Introductionmentioning

confidence: 99%

Microscopic Properties of Hydrogen Peroxide Activated Crumb Rubber and Its Influence on the Rheological Properties of Crumb Rubber Modified Asphalt

Wei

et al. 2019

Materials

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Crumb rubber modified (CRM) asphalt binder has been affirmed to improve resistance to rutting, moisture susceptibility, low-temperature cracking, and asphalt durability. However, CRM has poor compatibility with asphalt since crumb rubber molecules are vulcanized. The objective of this study was to develop a new method to prepare activated crumb rubber using hydrogen peroxide (H2O2) solution and to explore the rheological properties of H2O2 activated CRM (ACRM) asphalt. Three different percentages of H2O2 solution were used to activate crumb rubber. The surface properties of oxidized rubber were analysed using scanning electron microscopy. Moreover, the pore structure in rubber powder was investigated. The rheological properties of bitumen samples obtained from treated and untreated rubber were characterized by conducting dynamic shear rheometer tests. The test results show that the average pore size of the crumb rubber after activation with H2O2 solution is significantly smaller than that of the inactivated crumb rubber, and the volume and surface area of the crumb rubber pores change with H2O2 solution activation in a certain pattern. With the increase in H2O2 solution content, the contact surface between the particles increases, the floccules and pores of the powder increase, and the interface degree between the crumb rubber powder and the asphalt is strengthened. Solubility of the rubber hydrocarbon and the release ability of the carbon black particles from the crumb rubber in the asphalt binder increase, but the mechanical properties of the crumb rubber, including the strength, elasticity, and wear resistance, decrease. As a result, a reduction is observed in the elasticity, viscosity, high-temperature rutting resistance, and elasticity of the ACRM asphalt.

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Asphalt-rubber gap-graded mixture design practices: a state-of-the-art research review and future perspective

Cited by 72 publications

References 64 publications

The Effects of Using Crumb Rubber Modified Binder in an Asphalt Pavement

The Effects of Using Crumb Rubber Modified Binder in an Asphalt Pavement

A New Type of Crumb Rubber Asphalt Mixture: A Dry Process Design and Performance Evaluation

Microscopic Properties of Hydrogen Peroxide Activated Crumb Rubber and Its Influence on the Rheological Properties of Crumb Rubber Modified Asphalt

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