Influence of RAP sources and proportions on fracture and low temperature cracking performance of polymer modified binder

Singh, Dharamveer; Girimath, Shashibhushan

doi:10.1016/j.conbuildmat.2016.05.094

Cited by 38 publications

(3 citation statements)

References 14 publications

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“…The low-temperature crack disease is more likely to occur at the early stage of pavement, and then with the repeated fatigue of load, cracks gradually expand to form larger cracks [ 18 ], which overweighs the economic benefits obtained from saving materials [ 19 ]. Therefore, in order to improve the low-temperature cracking resistance of recycled asphalt mixture, reduce the occurrence of low-temperature cracks in the recycled pavement, improve the using quality of hot recycled asphalt pavement, and prolong the service life of the road, it is necessary to research the low-temperature cracking resistance of hot recycled asphalt pavement [ 20 , 21 ]. In addition, in the preparation of recycled mixture with high RAP content, the change of mixing process will largely affect the mixing state of old and new asphalt in the recycled mixture, thus affecting the road performance of the recycled mixture.…”

Section: Introductionmentioning

confidence: 99%

Study on Low-Temperature and Fatigue Performance of High RAP Content Hot Recycled Asphalt Mixture Based on the Degree of Blending (DOB)

Wu¹,

Sun²,

Wan³

et al. 2022

Polymers

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This paper selected three kinds of AC-20 hot-mix recycled asphalt mixtures with high RAP content (30%, 40%, and 50%). It obtains a mixture of different degrees of miscibility by changing RAP preheating temperatures and mixing temperatures. The calculation formula of the degree of blending (DOB) of RAP asphalt interface recycling is proposed. The DSR test quantitatively characterized the DOB mixture’s low temperature, and fatigue properties were tested by beam bending test and four-point bending fatigue test. The prediction models of the recycled mixture’s low temperature and fatigue properties were proposed. The RAP preheating temperature is the most critical factor that dominates both transfers of RAP asphalt to the surface of new aggregate and the effective blending of old and new asphalt. DOB has a significant great influence on low-temperature performance and fatigue performance. The DOB of recycled asphalt can be improved by adjusting and optimizing the process parameters of plant hot recycled mixture to effectively improve the recycled mixture’s low-temperature crack resistance and fatigue lifetime. The optimal RAP dosage and mixing process of required performance can be obtained based on the prediction models to save experimental time and cost.

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Section: Introductionmentioning

confidence: 99%

Study on Low-Temperature and Fatigue Performance of High RAP Content Hot Recycled Asphalt Mixture Based on the Degree of Blending (DOB)

Wu¹,

Sun²,

Wan³

et al. 2022

Polymers

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“…Only limited information, based on results of binder tests, has been reported in relation to the effect of RAP binder stiffness on PMA mixture cracking performance. Several researchers have reported that inclusion of RAP binder has a negative influence on PMA binder cracking resistance (12)(13)(14)(15). Furthermore, the higher the stiffness of RAP binder, the greater the effect of RAP binder on cracking resistance of PMA binder (13,14,16).…”

mentioning

confidence: 99%

“…Several researchers have reported that inclusion of RAP binder has a negative influence on PMA binder cracking resistance (12)(13)(14)(15). Furthermore, the higher the stiffness of RAP binder, the greater the effect of RAP binder on cracking resistance of PMA binder (13,14,16). Therefore, better understanding in relation to effects of RAP binder stiffness on mixture cracking performance may provide an effective way to determine maximum RAP content in PMA mixture.…”

mentioning

confidence: 99%

Approach for Determination of Maximum Reclaimed Asphalt Pavement Content in Polymer-Modified Asphalt Mixture

Park

Zou

Roque

et al. 2020

Transportation Research Record

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Reclaimed asphalt pavement (RAP), commonly generated from the millings of damaged roads, contains recyclable asphalt and aggregate. Polymer-modified asphalt (PMA) binders have had proven success in mitigating rutting and cracking in asphalt pavements. However, benefits associated with PMA binder may be reduced by aged and more brittle RAP binder. Currently, the maximum usage of RAP in PMA mixture is limited to 10–20% by several Departments of Transportation in the United States. Other than maximum RAP content, no criterion related to RAP characteristics is used to limit RAP usage in PMA mixture. Recent studies showed RAP binder stiffness and RAP aggregate gradation appeared to be important characteristics related to cracking performance of PMA mixture containing RAP. Therefore, this research focused on determining maximum allowable RAP content in PMA mixture for individual RAP sources based on key RAP characteristics identified, that is, RAP stiffness and RAP fineness. Interstitial component direct tension (ICDT) test was conducted to determine fracture energy for interstitial component (i.e., the fine portion of PMA mixture containing RAP), which is known to be correlated well with the fracture energy of the corresponding mixture. Results showed introduction of coarser and less stiff RAP generally resulted in greater fracture energy, which allowed up to 40% RAP usage in PMA mixture. Integration of key RAP characteristics identified and the results of ICDT test provide a systematic approach for determination of maximum RAP content in PMA mixtures. Further research is recommended to evaluate additional RAP sources to verify the proposed approach.

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Implementation of the Double-Edge-Notched Tension Test for Asphalt Cement Acceptance

Paliukaitė

Assuras

Silva

et al. 2017

Transp. in Dev. Econ.

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Influence of RAP sources and proportions on fracture and low temperature cracking performance of polymer modified binder

Cited by 38 publications

References 14 publications

Study on Low-Temperature and Fatigue Performance of High RAP Content Hot Recycled Asphalt Mixture Based on the Degree of Blending (DOB)

Study on Low-Temperature and Fatigue Performance of High RAP Content Hot Recycled Asphalt Mixture Based on the Degree of Blending (DOB)

Approach for Determination of Maximum Reclaimed Asphalt Pavement Content in Polymer-Modified Asphalt Mixture

Implementation of the Double-Edge-Notched Tension Test for Asphalt Cement Acceptance

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