Analysis of viscosity and composition properties for crumb rubber modified asphalt

Li, Peilong; Jiang, Xiuming; Ding, Zhan; Zhao, Junkai; Shen, Minghan

doi:10.1016/j.conbuildmat.2018.02.174

Cited by 53 publications

(17 citation statements)

References 8 publications

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“…Examples of the use of other waste polymers can also be found on previous works, namely low-density polyethylene -LDPE [12], polypropylene -PP [12,13], acrylonitrile butadiene styrene -ABS [14], polyvinyl chloride -PVC [13,15,16], polyethylene terephthalate -PET [17][18][19]. Furthermore, recycled ground tire rubber has also been widely used [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 98%

Using waste polymers as a reliable alternative for asphalt binder modification – Performance and morphological assessment

Costa

Silva

Peralta

et al. 2019

Construction and Building Materials

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h i g h l i g h t sRecycled polymers were studied as alternative to virgin SBS for binder modification. EVA modified binder showed similar performance to the control SBS modified binder. HDPE improved binder's high-temperature performance but decreased elastic recovery. Polymer modification enhanced binder properties, except storage stability. Waste plastics are an excellent alternative for more ecologic binder modification.

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Section: Introductionmentioning

confidence: 98%

Using waste polymers as a reliable alternative for asphalt binder modification – Performance and morphological assessment

Costa

Silva

Peralta

et al. 2019

Construction and Building Materials

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“…When the rubber content exceeds 20% wt, the increase range of viscosity increases greatly. This is because the viscosity of rubber asphalt is determined by the viscosity of asphalt binder, the interaction between rubber and asphalt, and the particle spatial effect of granular rubber particles [39,40]. The increase of rubber can improve the interaction and spatial effect, so the viscosity of modified asphalt is increased.…”

Section: Resultsmentioning

confidence: 99%

Investigation on Rheological Properties and Storage Stability of Modified Asphalt Based on the Grafting Activation of Crumb Rubber

Xie

Yang

et al. 2019

Polymers

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Acrylamide with a double bond and amide group can not only copolymerize with macromolecules of crumb rubber but also react with acidic groups in asphalt, so it was selected as a modifier to activate crumb rubber through chemical graft action. The purpose is to improve the compatibility between crumb rubber and asphalt and thus improve the rheological properties and storage stability of rubber asphalt. Infrared spectroscopy (IR) and scanning electron microscopy (SEM) were used to characterize the crumb rubbers and their modified asphalt. It was found that the crumb rubber of grafting acrylamide had better compatibility in asphalt due to its larger specific surface area and chemical reaction with asphalt. In addition, the high temperature rheological test, low temperature creep test, and polymer separation test were carried out to study the effect of grafted activated crumb rubber on the properties of modified asphalt. The results showed that compared with modified asphalt with common crumb rubber (CRMA), the rheological properties and storage stability of modified asphalt with grafting activated crumb rubber (A–G–R) were improved significantly. The results of microscopic and macroscopic tests show that the activated rubber particles have a larger contact area with asphalt due to a rougher surface and the chemical cross-linking between rubber particles and asphalt further strengthens their interaction. Therefore, there is a relatively stable blend system formed in modified asphalt, and its performance of modified asphalt has been improved.

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“…logP: common logarithm of penetration at 25 °C Viscosity can be defined as the resistance to the flow of a fluid. Considering the standard test temperature used by Li et al [12], the test was performed in three replicates at a mixing temperature of 180 °C for polymer modified binder. A Brookfield DV-II+ Pro Viscometer rotational viscometer was used according to BS EN 13302 [26] at 180 °C.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

“…Critical evaluation of several previous research papers showed that the low content of rubber (around 4%) has almost no significant effect on the mechanical properties and the performance of the asphalt mixtures, more than 20% was also found to be inappropriate [11]. Moreover, from the angle of visco-flow characteristics and viscosity, it is suggested to use 15%-25% of crumb rubber at 180 °C of treatment temperature and a treatment time of 90 minutes [12]. However, rubberized binders may be attributed to the weak compatibility between rubber and bitumen, which is demonstrated by its propensity to separate during transportation to the paving site or during high-temperature static storage [13].…”

Section: Introductionmentioning

confidence: 99%

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

Hawesah

Sadique

Harris

et al. 2021

Period. Polytech. Civil Eng.

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The quality of asphalt pavement maintenance depends on several important factors, including the selection of patching materials and choice of repair technique. Conventional hot mix plants operate to support large paving projects, and economy favors high-volume output. When repairs and maintenance are needed it can be challenging to maintain small quantities of hot bituminous mixtures at a sufficient temperature, especially in the case of winter maintenance and consequently the repair materials cannot be compacted to the desired level in some occasions. The temperature sensitivity plays a significant factor to understand the asphalt pavement failures and indicates how quickly asphalt properties change over time in terms of indices such as penetration index. Therefore, this research aims to develop a polymer-modified binder with reduced temperature sensitivity, and it can be used for hand-laid application in small quantities for emergency winter repair and maintenance. The results showed that the highest penetration index has been achieved by modifying bitumen with 20% rubber and 2% wax, which is reduced the temperature sensitivity by 168%. Additionally, the Fourier Transform Infrared Spectroscopy (FTIR) test and X-Ray Diffraction (XRD) test were conducted to monitor the changes in the chemical composition and identify crystalline phases of polymer modified binder from the aspect of functional groups. It is indicated that the bitumen, rubber, and wax react chemically to build 3D networks that have an interlaced form in the bitumen matrix resulting in reduced temperature sensitivity of the polymer modified binder.

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Analysis of viscosity and composition properties for crumb rubber modified asphalt

Cited by 53 publications

References 8 publications

Using waste polymers as a reliable alternative for asphalt binder modification – Performance and morphological assessment

Using waste polymers as a reliable alternative for asphalt binder modification – Performance and morphological assessment

Investigation on Rheological Properties and Storage Stability of Modified Asphalt Based on the Grafting Activation of Crumb Rubber

Improving the Temperature Sensitivity of Bitumen for Emergency Pavement Repair

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