High and intermediate temperature performance evaluation of crumb rubber modified binders with RAP

Singh, Dharamveer; Sawant, Dheeraj; Xiao, Feipeng

doi:10.1016/j.trgeo.2016.10.003

Cited by 43 publications

(7 citation statements)

References 10 publications

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“…Principal acronyms of the modification process and technologies found in the literature that are useful for a better understanding of the results. CR + SBS + sulfur Crumb rubber modified binder with the further addition of SBS and sulfur [86] TB + SBS Terminal Blend modification of the binder with the further addition of SBS [50,78,88] TB + PPA Terminal Blend modification of the binder with the further addition of polyphosphoric acid [50] Figures 8-10 show the comparison between different CRM binders (TB, AR, CB, AR + WMA, DVR, CRM + RAP, RAP, CR + SBS, and CR + SBS + sulfur) and the traditional binder for certain standard properties. From Figure 8 it is possible to observe the comparison between different CRM binders with the traditional binder before the modification for different standard properties: viscosity, ductility, softening point and penetration.…”

Section: Standard Properties Rheology and High-and Low-temperature mentioning

confidence: 99%

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

et al. 2019

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Tire rubber recycling for civil engineering applications and products is developing faster, achieving increasingly higher levels of maturation. The improvements in the material circle, where crumb rubber, generated as a by-product of the tire rubber making process, becomes the resource used for the construction of road asphalt pavement, is absolutely necessary for increasing the sustainability of the entire supply chain. The paper reports the results of an accurate data analysis derived from an extensive literature review of existing processes, technologies, and materials within construction of infrastructure. The current position, the direction, and rate of progress of the scientific efforts towards the reuse and recycling of tire rubber worldwide have been shown. Furthermore, an in-depth analysis of a set of important properties of Crumb Rubber Modified Asphalt has been carried out—fabrication parameters, standard properties, high and low-temperature performance, and rheological properties. Statistics over a sample of selected publications have been presented to understand the main processes adopted, rubber particle size, temperatures, and possible further modifications of crumb rubber modified binder.

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Section: Standard Properties Rheology and High-and Low-temperature mentioning

confidence: 99%

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

et al. 2019

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“…The peaks in the untreated and plasticized crumb rubber spectra in Figure 3 only differ in intensity and not position. The intensity of the C=C stretching vibration at 1537 cm −1 of the plasticized crumb rubber is lower than that of the untreated crumb rubber, showing the partial cleavage of the C=C bond by plasticization [ 13 ]. However, the deformation vibration of the methyl group –CH 3 at 1371 cm −1 is stronger for the plasticized crumb rubber than for the untreated crumb rubber, which indicates a reduction in the internal cross-linking of plasticized crumb rubber molecules.…”

Section: Methodsmentioning

confidence: 99%

“…Pei et al investigated the high-temperature rheological properties of asphalt rubber containing crumb rubber that had been treated with bio-oil and zinc stearate [ 11 , 12 ]. Singh et al added different crumb rubber contents to a recycled asphalt binder and used multistress creep recovery and linear amplitude sweep tests to evaluate the high-temperature rut-resistance of the asphalt rubber [ 13 , 14 ]. Xiao et al found that the high-temperature rheological properties of asphalt rubber were significantly improved by the addition of plasma-treated crumb rubber [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Rheological Properties and Microscopic Characterization of Asphalt Rubbers Containing Heterogeneous Crumb Rubbers

et al. 2020

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Asphalt rubbers mixed with untreated and plasticized crumb rubbers and a compounding coupling agent were investigated in this study. The low-temperature rheological properties of asphalt rubbers at different aging levels were tested using a dynamic shear rheometer (DSR). An interconversion between linear viscoelastic material functions was used to obtain converted evaluation indexes for the asphalt rubbers at low temperatures. Lastly, the physicochemical characteristics and the microscopic morphology of the asphalt rubbers were evaluated using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), respectively. In conclusion, the storage moduli of the asphalt rubbers containing heterogeneous crumb rubbers increased with the plasticized crumb rubber content and the aging level. The converted relaxation moduli were consistent with the change trend of the storage moduli, and the relaxation rate decreased as the plasticized crumb rubber content and the aging level increased. The process of mixing the base asphalt with crumb and plasticized crumb rubbers was physical blending, and the effect of aging on the absorption peak change of asphalt rubber with plasticized crumb rubbers was less than that of asphalt rubber with ordinary crumb rubbers. Aging deteriorated the blending between the crumb rubber and the base asphalt, and a distinct interface appeared between the crumb rubber and the base asphalt. The particle cores of the plasticized crumb rubber in the asphalt rubber were difficult to maintain. Furthermore, as the plasticized crumb rubber content increased, more fine particles stripped off the plasticized crumb rubber after aging.

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“…However, the binder behavior significantly changes by mixing the RAP binder with CRMB, where the binder performance does not show a consistent trend by changing the RAP binder or CR dosages. For example, the fatigue life and creep compliance decrease by increasing the RAP dosage up to 25%, while they increase by further accretion of RAP dosage . The rutting factor increases by increasing the RAP dosage only at test temperatures below 85 °C .…”

Section: Introductionmentioning

confidence: 99%

Aging Potential and its Impact on the Bonding Strength of Rubberized RAP Asphalt Binder

Mohamed

El-Badawy

Xiao

2023

ACS Sustainable Chem. Eng.

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Rejuvenating the reclaimed asphalt binder using crumb rubber-modified binder is a sustainable paving technology that has the advantage of using waste to recycle another waste material. As binder durability is crucial in evaluating the recyclability of reclaimed asphalt using crumb rubber-modified binder, this study investigates the binder potential for aging and the impact of aging on binder bond strength. Thirty binders with different crumb rubber and reclaimed asphalt dosages were aged by rolling thin oven and pressure aging vessel and tested by Fourier-transformed infrared spectroscopy and pull-off tests. The results reveal that binder aging and reclaimed binder addition strengthen the bonding strength and elevate the carbonyl intensity, which is the keen factor responsible for bonding enhancement. However, incorporating reclaimed binders attenuates the binder aging potential and limits the bonding enhancement after aging. Crumb rubber interacts with the asphalt binder and improves the bonding strength accordingly. However, the crumb rubber interaction with the binder significantly affects the aging potential of the binder, which increases with crumb rubber disintegration and decreases with rubber swelling. As rubber swelling is the dominating interaction mechanism, the crumb rubber modification mostly undermines the bonding enhancement after aging.

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High and intermediate temperature performance evaluation of crumb rubber modified binders with RAP

Cited by 43 publications

References 10 publications

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

Crumb Rubber Modifier in Road Asphalt Pavements: State of the Art and Statistics

Low-Temperature Rheological Properties and Microscopic Characterization of Asphalt Rubbers Containing Heterogeneous Crumb Rubbers

Aging Potential and its Impact on the Bonding Strength of Rubberized RAP Asphalt Binder

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