Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt

Ge, Dongdong; Zhou, Xiaodong; Chen, Siyu; Jin, Dongzhao; You, Zhanping

doi:10.3390/su12208383

Cited by 18 publications

(4 citation statements)

References 46 publications

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“…With the rapid development of the rubber industry and automobile industry, a large number of waste rubber tire products have piled up [ 1 , 2 , 3 , 4 ]. In China, the amount of waste tires has reached 13.07 million tons by 2016, and it is still growing rapidly every year.…”

Section: Introductionmentioning

confidence: 99%

Effect of Desulfurization Process Variables on the Properties of Crumb Rubber Modified Asphalt

Zhang

Zhang²,

Chen³

et al. 2022

Polymers

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A large number of waste tires are in urgent need of effective treatment, and breaking waste tires into crumb rubber powder for modifying asphalt has been proved as a good idea to solve waste tires. Crumb rubber modified asphalt not only has good high and low temperature performance, durability, and aging resistance but can also reduce pavement noise and diseases, which has wide application prospects. In this study, crumb rubber powder was desulfurized by mechanochemical method to prepare desulfurized crumb rubber modified asphalt. During the desulfurization process of crumb rubber, the effects of desulfurization process variables including desulfurizer type, desulfurizer content, and desulfurization mixing temperature and time were considered, and then the physical properties of modified asphalt were tested. The test results showed that after mixing crumb rubber powder with desulfurizer, the viscosity of crumb rubber powder modified asphalt can be reduced. Moreover, the storage stability of crumb rubber powder modified asphalt could also be improved by mixing crumb rubber with desulfurizer. Based on the physical properties of crumb rubber powder modified asphalt, the desulfurization process of selected organic disulfide (OD) desulfurizer was optimized as follows: the OD desulfurizer content was 3%, the desulfurization mixing temperature was 160 °C, and the mixing time was 30 min. In addition, Fourier infrared spectroscopy analysis was carried out to explore the modification mechanism of desulfurized crumb rubber powder modified asphalt. There is no fracture and formation of chemical bonds, and the modification of asphalt by crumb rubber powder is mainly physical modification.

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Section: Introductionmentioning

confidence: 99%

Effect of Desulfurization Process Variables on the Properties of Crumb Rubber Modified Asphalt

Zhang

Zhang²,

Chen³

et al. 2022

Polymers

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“…Nylon fiber and scrap tire rubber are two components of scrap tires [3]. Recycling used tire rubber and nylon fiber in asphalt pavement is one of the most effective methods to dispose of tire rubber and nylon fiber to prevent an increasing environmental hazard [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Asphalt Mixture with Scrap Tire Rubber and Nylon Fiber from Waste Tires: Laboratory Performance and Preliminary M-E Design Analysis

You

Zhou

et al. 2022

Buildings

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Scrap tire rubber and nylon fiber are waste materials that could potentially be recycled and used to improve the mechanical properties of asphalt pavement. The objective of this research was to investigate the properties of scrap tire rubber and nylon fiber (R-F) modified warm mix asphalt mixture (WMA). The high-temperature performance was estimated by the Hamburg wheel-tracking testing (HWTT) device. The low-temperature cracking performance was evaluated by the disk-shaped compact tension (DCT) test and the indirect tensile strength (IDT) test. The stress and strain relationship was assessed by the dynamic modulus test at various temperatures and frequencies. The extracted asphalt binder was evaluated by the dynamic shear rheometer (DSR). Pavement distresses were predicted by pavement mechanistic-empirical (M-E) analysis. The test results showed that: (1) The R-F modified WMA had better high-temperature rutting performance. The dynamic modulus of conventional hot mix asphalt mixture (HMA) was 21.8% ~ 103% lower than R-F modified WMA at high temperatures. The wheel passes and stripping point of R-F modified WMA were 2.17 and 5.8 times higher than those of conventional HMA, respectively. Moreover, the R-F modified warm mix asphalt had a higher rutting index than the original asphalt. (2) R-F modified WMA had better cracking resistance at a low temperature. The failure energy of the R-F modified WMA was 24.3% higher than the conventional HMA, and the fracture energy of the R-F modified WMA was 7.7% higher than the conventional HMA. (3) The pavement distress prediction results showed the same trend compared with the laboratory testing performance in that the R-F modified WMA helped to improve the IRI, AC cracking, and rutting performance compared with the conventional HMA. In summary, R-F modified WMA can be applied in pavement construction.

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“…Numerous researchers have focused on the application of scrap tire rubber and its performance in asphalt mixtures. Scrap tire rubber-modified asphalt mixture has been proven to have outstanding low-temperature cracking and fatigue resistance in some experiments [1][2][3]. The low-temperature performance of scrap tire rubber-modified asphalt mixture improves as the scrap tire rubber content increases within a specific range.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Rubber Asphalt with Polymer Asphalt under Long-Term Aging Conditions in Michigan

et al. 2022

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The objective of this study is to compare the long-term aging performance of dry-processed rubber-modified asphalt mixture with styrene–butadiene–styrene polymer-modified asphalt mixture on heavy traffic volume roads in the wet-freeze environment of Michigan. The rutting performance was evaluated using the Hamburg wheel track device. The disc-shaped compact tension test was used to assess the fracture energy. The dynamic modulus experiment was used to estimate the load and displacement relationship. The asphalt binder properties were evaluated using multiple stress creep recovery and the linear amplitude sweep test. The pavement distresses were evaluated using the pavement mechanistic–empirical design. All three types of asphalt mixture show excellent rutting resistance after long-term aging conditions, while the fracture energy of the rubber mix is 17.1% to 30.5% higher than that of the control mix and 6.8% to 9.1% higher than that of the polymer mix. The rubber and polymer incorporated with the asphalt binder improved the resistance to permanent deformation and improved the fatigue life of the asphalt binder. In summary, the rubberized asphalt technology using the dry process shows better cracking resistance and fatigue life. Therefore, rubberized asphalt using the dry process will exhibit adequate performance when used for high-volume roads in the wet-freeze environment of Michigan.

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Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt

Cited by 18 publications

References 46 publications

Effect of Desulfurization Process Variables on the Properties of Crumb Rubber Modified Asphalt

Effect of Desulfurization Process Variables on the Properties of Crumb Rubber Modified Asphalt

Asphalt Mixture with Scrap Tire Rubber and Nylon Fiber from Waste Tires: Laboratory Performance and Preliminary M-E Design Analysis

Comparison of Rubber Asphalt with Polymer Asphalt under Long-Term Aging Conditions in Michigan

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