Rheological properties of modified crumb rubber asphalt binder and selecting the best modified binder using AHP method

Khalili, Mehdi; Jadidi, Kazem; Karakouzian, Moses; Amirkhanian, Serji

doi:10.1016/j.cscm.2019.e00276

Cited by 14 publications

(9 citation statements)

References 21 publications

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“…The addition of recycled tire rubber waste in asphalt mixtures affects the overall binder properties. For example, Khalili et al [34] reported that the particle size, shape, and content of crumb rubber had significant effects on the rheological properties of the modified asphalt binder. Kim et al [35] studied the flow behavior, elasticity, loading, and temperature dependency of crumb rubber-modified binders.…”

Section: Interaction Effects Of Crumb Rubber-modified Asphalt Bindermentioning

confidence: 99%

“…Several studies have shown that adding crumb rubber into asphalt mixtures increases the asphalt's elasticity, flexibility, and durability against aging [34,46,[59][60][61]. For example, Khalili et al [34] evaluated the effects of aging on asphalt binders mixed with crumb rubber waste using the rolling thin-film oven (RTFO) and pressure-aging vessel (PAV) tests. Their results showed that the elastic component of the dynamic shear modulus increased with the increase in rubber content for aged and unaged asphalt binders.…”

Section: Durability and Aging Of Asphalt Rubber Pavementsmentioning

confidence: 99%

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Recycling Tire Rubber in Asphalt Pavements: State of the Art

2020

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The use of recycled tire rubber in asphalt pavements to improve the overall performance, economy, and sustainability of pavements has gained considerable attention over the last few decades. Several studies have indicated that recycled tire rubber can reduce the permanent deformation of flexible pavements and enhance its resistance to rutting, reduce pavement construction and maintenance costs, and improve the resistance to fatigue damage. This paper provides a systematic and critical overview of the research on and practice of using recycled tire rubber in asphalt pavements in terms of engineering properties, performance, and durability assessment. This critical analysis of the state-of-the-art should enhance the understanding of using recycled tire rubber in asphalt pavements, define pertinent recommendations, identify knowledge gaps, and highlight the need for concerted future research.

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Section: Interaction Effects Of Crumb Rubber-modified Asphalt Bindermentioning

confidence: 99%

Section: Durability and Aging Of Asphalt Rubber Pavementsmentioning

confidence: 99%

Recycling Tire Rubber in Asphalt Pavements: State of the Art

2020

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“…Other methods are needed to be combined in order to obtain more effective results [6][7][8]. AHP when used to rank requires a relatively longer time and only compares between criteria, there is no normalization process and calculation of its costs and benefits [9,10,12]. The AHP method is also used to choosing the optimal technology to rehabilitate the pipes in water distribution systems [13].…”

Section: Literature Reviewmentioning

confidence: 99%

Decision Support System for Determining Critical Land in Klaten Regency

et al. 2020

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Critical land has become a problem in the world. Critical land is very detrimental to the health of the land. Several factors cause the land to become critical. One of them is the use of land that is not by the capabilities of the land. If no repairs made, the land will be physically, chemically, and biologically damaged. Klaten Regency is one of the regencies in Central Java Province, which has quite extensive critical land. It is necessary to monitor and improve land quality regularly to avoid critical land problems. Data and information on critical land obtained from Klaten Regency processed into a decision support system. Decision Support System uses a combination of Analytical Hierarchy Process (AHP) and Technique For Order Preference by Similarity to Ideal Solution (TOPSIS) methods. In this research, a Web-based Decision Support System created to determine the critical land area in Klaten Regency. The information system created has an alternative menu and criteria that determine the potential of critical land in Klaten Regency, making it easier for users to obtain information.

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“…This leads to a reduction of lighter fractions of bitumen and results in an increase in complex modulus |G*| values and a reduction in phase angle (δ) values [4] [5]. Factors affecting the properties of CR modified binder include time and temperature of bitumen -CR interaction, CR particle size, shape and content [6] [7]. The reaction between CR and bitumen is highly dependent on time and temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of Short Term Aging on Unmodified and Local Crumb Rubber (LCR) Modified Bitumen

Waheed

Elahi

2020

QUESTRJ

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Two grades of bitumen, (60/70 and 80/100), were modified by addition of Local Crumb Rubber (LCR) by weight of base bitumen. To investigate the effects of short-term aging on modified and LCR modified bitumen, Rolling Thin Film Oven (RTFO) test was used to simulate the short term aging. Dynamic shear rheometer (DSR) was used to assess the rheological properties of bitumen, both before and after aging. It was observed that at 65 degree Celcius on aging, the phase angle (sigma) of unmodified bitumen decreased by 3 and 4% for 60/70 and 80/100 bitumen respectively; whereas, for 60/70 LCR modified bitumen, the phase angle (sigma) on RTFO aging decreased by 7% for all LCR content (10, 15 and 20%) by weight of base bitumen. However, on RTFO aging (sigma), values for LCR modified 80/100 bitumen varied across different LCR content and could not be generalized. The complex modulus |G*| of LCR modified 60/70 bitumen increased on aging for both modified and unmodified bitumen at 65C, but with the increase in LCR content, the difference between bitumen aged and un-aged values of |G*| was considerably lowered. An interesting finding was for 80/100 bitumen modified with 20% LCR content by weight, which showed a reduction in |G*| values and an increase in (sigma) values on aging. This shows that to some extent, LCR compensates for the stiffening effects of aging.

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Rheological properties of modified crumb rubber asphalt binder and selecting the best modified binder using AHP method

Cited by 14 publications

References 21 publications

Recycling Tire Rubber in Asphalt Pavements: State of the Art

Recycling Tire Rubber in Asphalt Pavements: State of the Art

Decision Support System for Determining Critical Land in Klaten Regency

Effect of Short Term Aging on Unmodified and Local Crumb Rubber (LCR) Modified Bitumen

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