Characteristics of compound asphalt modified by waste tire rubber (WTR) and ethylene vinyl acetate (EVA): Conventional, rheological, and microstructural properties

Yan, Kezhen; Chen, Jinghao; You, Lihua; Tian, Shan

doi:10.1016/j.jclepro.2020.120732

Cited by 66 publications

(24 citation statements)

References 49 publications

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“…High gel content of TPV in PMA resulted in harder PMA as seen in the lower penetration value (higher degree of hardness) and higher softening temperature. This is consistent with the findings of Yan et al [ 11 ] that crumb rubber (CR) content affected penetration and softening temperature more than that of EVA content. Changes of physical properties could probably be due to a different degree of crosslinking.…”

Section: Discussionsupporting

confidence: 93%

“…According to Qian and Fan [ 25 ], addition of styrene–butadiene–styrene block copolymer (SBS) in rubberized asphalt containing 20 wt% CR can decrease the penetration value from 60 (0 wt% SBS) to 40 (3 wt% SBS). For EVA and CR modified asphalt, a penetration value of 40 can be observed from the asphalt modified with EVA 4 wt% and CR 10 wt% [ 11 ]. It seemed that TPV could achieve similar penetration from addition of only 5 wt% into asphalt.…”

Section: Discussionmentioning

confidence: 99%

“…Plastics are often released into the sea either intentionally or unintentionally, and accumulation of such waste is considered to be harmful or even toxic to marine lifeforms. Many solutions have been developed to solve this problem with the method of utilizing plastic waste being one such option, for example depolymerization [8], the recycling process [9,10], or the blending of plastic waste with asphalt to prepare polymer modified asphalt [11][12][13][14][15][16][17]. The addition of plastics can improve the asphalt properties such as penetration, rutting resistance or Superpave parameter, and thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Styrene butadiene copolymer (SBS) and styrene butadiene rubber are common elastomers used to improve asphalt’s properties [ 23 , 24 , 25 , 26 ]. Moreover, to utilize the waste, crumb rubber is also used to improve physical properties of asphalt [ 11 , 25 , 27 , 28 ]. The crumb rubber, which is in the form of fully crosslinked rubber, is added into the asphalt as particles resulting in a lower degree of processability and the possibility of phase separation occurring during storage if kept for a long duration.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Asphalt Incorporation with Ethylene Vinyl Acetate (EVA) Copolymer and Natural Rubber (NR) Thermoplastic Vulcanizates (TPVs): Effects of TPV Gel Content on Physical and Rheological Properties

2021

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Plastic waste has been incorporated with asphalt to improve the physical properties of asphalt and alleviate the increasing trend of plastic waste being introduced into the environment. However, plastic waste comes in different types such as thermoplastic or thermoset, which results in varied properties of polymer modified asphalt (PMA). In this work, four thermoplastic vulcanizates (TPVs) were prepared using different peroxide concentrations to produce four formulations of gel content (with varying extent of crosslinked part) in order to imitate the variation of plastic waste. All four TPVs were then mixed with asphalt at 5 wt% thus producing four formulations of PMA, which went through physical, rheological, and storage stability assessments. PMA with higher gel content possessed lower penetration and higher softening temperature, indicating physically harder appearance of PMA. Superpave parameters remained unchanged among different gel content PMA at temperatures of 64, 70, and 76 °C. PMA with any level of gel content had lower Brookfield viscosity than PMA without gel content at a temperature of 135 °C. Higher gel content resulted in shorter storage stability measured with greater different softening temperatures between top and bottom layers of PMA after 5 days of 163 °C storage. This study shows that asphalt with thermoset plastic waste is harder and easier to pave, thus making the non-recycling thermoset plastic waste more useful and friendly to the environment.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Asphalt Incorporation with Ethylene Vinyl Acetate (EVA) Copolymer and Natural Rubber (NR) Thermoplastic Vulcanizates (TPVs): Effects of TPV Gel Content on Physical and Rheological Properties

2021

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“…For this reason, bitumen modification has been popularized for decades to expand the service life of pavement [6,7]. To date, there have been numerous products developed for bitumen modification, including styrenebutadiene-styrene block copolymer (SBS) [8], butadiene-styrene copolymer (SBR) [9], ethylene-vinyl acetate (EVA) [10,11], Polyethylene (PE) [12], and epoxy [13,14]. Among these, epoxy bitumen (EB) has been most widely accepted in constructing steel bridge deck pavements [15,16].…”

Section: Introductionmentioning

confidence: 99%

Influence of preparation methods on the performance of cold-mixed epoxy bitumen

et al. 2021

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Cold-mixed epoxy bitumen (CEB) has been presented as an eco-friendly paving material used for steel bridge deck pavements. This study performed an investigation on three preparation methods of CEBs, which includes one kind of three-component and two kinds of two-component methods. The curing process was characterized through the viscosity measurement. Meanwhile, the microstructure of CEBs was observed using fluorescence microscopy. Mechanical properties of CEBs prepared with different methods were characterized by employing direct tensile tests and dynamic mechanical analysis (DMA). Finally, thermogravimetric analysis (TGA/DTG) was conducted to feature the thermal stability of CEBs. The results indicated that the preparation methods significantly affected the performance of cured CEBs, although the same mix design was adopted. The curing temperature determined the curing rate of CEBs, while the preparation methods dominated the morphological characteristic of cured CEBs. The three-component preparation method can achieve acceptable mechanical performance for engineering requirements. As for two-component methods, the curing agent is supposed to be mixed with bitumen to obtain satisfying microstructures of CEBs.

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Synthesis of tannic acid‐terephthalyl chloride modified rubber powder for the fabrication of tannic acid‐terephthalyl chloride‐rubber/styrene‐butadiene‐styrene modified asphalt

Wang

Muhammad

Mao

et al. 2021

J of Applied Polymer Sci

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Herein, tannic acid‐terephthalyl chloride (TA‐TPC) was prepared and was applied for the preparation of TA‐TPC‐Rubber to composite styrene butadiene styrene (SBS)‐modified asphalt (SBSMA). Fourier transform infrared spectroscopy and scanning electron microscopy indicated that TA‐TPC successfully attached to the surface of rubber powder (RP), which improved the bonding between RP and SBSMA. Fluorescence microscopy analysis showed that TA‐TPC‐Rubber formed a complete crosslinking network structure in SBSMA, while thermogravimetry analysis proved the higher thermal stability of TA‐TPC‐Rubber/SBSMA. Dynamic shear rheometer and multi‐stress creep recovery tests confirmed that compared with SBSMA, the storage modulus (G') and loss modulus (G") of 12% TA‐TPC‐Rubber/SBSMA at 46°C were increased by 37.14% and 34.36%, respectively, the recovery rate was increased by 35.49% (0.1 kPa) and 31.91% (3.2 kPa) while the average creep compliance was decreased by 68.67% (0.1 kPa) and 59.87% (3.2 kPa). The phase segregation test proved that the compatibility between RP and SBSMA was improved by the modification of TA‐TPC, and the difference between the upper and lower softening points were reduced by 53.85%. The findings of this study can be of great significance for designing modified asphalt from cost‐effective raw materials through a convenient process for highways and construction applications.

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Characteristics of compound asphalt modified by waste tire rubber (WTR) and ethylene vinyl acetate (EVA): Conventional, rheological, and microstructural properties

Cited by 66 publications

References 49 publications

Asphalt Incorporation with Ethylene Vinyl Acetate (EVA) Copolymer and Natural Rubber (NR) Thermoplastic Vulcanizates (TPVs): Effects of TPV Gel Content on Physical and Rheological Properties

Asphalt Incorporation with Ethylene Vinyl Acetate (EVA) Copolymer and Natural Rubber (NR) Thermoplastic Vulcanizates (TPVs): Effects of TPV Gel Content on Physical and Rheological Properties

Influence of preparation methods on the performance of cold-mixed epoxy bitumen

Synthesis of tannic acid‐terephthalyl chloride modified rubber powder for the fabrication of tannic acid‐terephthalyl chloride‐rubber/styrene‐butadiene‐styrene modified asphalt

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