Grafting waste rubber powder and its application in asphalt

Wang, Xiaoping; Liang, Hong; Wu, Haijian; Liu, Huilin; Jia, Deming

doi:10.1016/j.conbuildmat.2020.121881

Cited by 36 publications

(9 citation statements)

References 27 publications

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“…After adding rubber powder to asphalt, it will undergo swelling and partial dissolution under high-speed shear loads [ 3 , 32 ]. The swelled rubber powder can adsorb lightweight components (aromatics and saturates) in the asphalt [ 23 , 33 ], resulting in an increase in the relative content of resin and asphaltene in the compound-modified asphalt, and improving the asphalt’s shear deformation resistance.…”

Section: Resultsmentioning

confidence: 99%

“…These waste scrap tires occupy a large amount of arable land, and some incineration treatments also produce large amounts of harmful gases and CO 2 , which seriously endanger the natural environment [ 2 ]. In order to improve this situation, road engineering researchers have been utilizing waste tires in road construction [ 3 ]. At present, the application of waste tires in pavement construction takes on many forms: roadbed restraint with intact tires, reinforcement with tire strips and nets, toughening, and vibration damping with waste tire particles, as well as modification and enhancement with waste tire powder [ 4 ], as shown in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

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Evaluation and Correlation Analysis of the Rheological Properties of Ground Tire Rubber and Styrene Butadiene Styrene Compound-Modified Asphalt

Tan

et al. 2023

Polymers

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With the increase in highway traffic volume, many waste tires are being produced, which puts serious pressure on the global ecological environment. Processing waste tires into powder and adding them to asphalt is an important and effective way to solve this noticeable environmental challenge. In this paper, to produce ground tire rubber (GTR) and styrene-butadiene-styrene (SBS) compound-modified asphalt, GTR was put into SBS-modified asphalt (GTRSA). Subsequently, some ordinary property tests, frequency sweep tests, and multiple stress creep recovery tests were conducted to investigate the conventional properties and rheological properties of GTRSA. Moreover, the 2S2P1D (two springs, two parabolic elements, and one dashpot) model was adopted to analyze the consequences of adding GTR content on the rheological properties of GTRSA. Finally, the Pearson correlation coefficient was employed to reveal the connection between the conventional properties and the rheological properties. The results show that GTR has a great impact on improving the rutting resistance, thermo-sensitive performance, shear resistance capability, stress sensitivity, and creep recovery performance of GTRSA. Adding 20% GTR can improve the creep recovery rate to 80.8%. The 5 °C ductility index suggests that GTR makes a difference to the low-temperature properties. The rheological properties and conventional properties had a strong linear link.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation and Correlation Analysis of the Rheological Properties of Ground Tire Rubber and Styrene Butadiene Styrene Compound-Modified Asphalt

Tan

et al. 2023

Polymers

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“…Li et al pointed out that the aging resistance of waste-tire-rubber-powder-modified asphalt is also excellent [14]. The excellent flexibility of rubber also contributes to enhancing the ability of asphalt pavement to resist cracking in cold regions [15,16]. Another study also indicates that asphalt mixtures modified with waste rubber powder have excellent noise reduction functions, which can improve driving comfort [17,18].…”

Section: Of 13mentioning

confidence: 99%

Characteristics of Polyurethane/Waste Rubber Powder Composite Modifier and Its Effect on the Performance of Asphalt Mixture

Gao,

Zhao,

Zhao

2023

Sustainability

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To solve the problems of storage stability and the volatile organic compound emission of waste-rubber-powder-modified bitumen, the strategy of preparing composite modifiers using waterborne polyurethane coating for waste rubber powder was proposed in an early-stage work. However, the effect of polyurethane/waste rubber powder composite modifier on the performance of asphalt mixture is unclear, which limits the further popularization of this technology. Therefore, this work mainly investigates the characteristics of composite modifiers and their influence on asphalt mixture. The results indicate that the optimum ratio of polyurethane to waste rubber powder is about 1:1, which can give the composite modifier sufficient mechanical properties and acceptable economic benefits. The scanning electron microscopy images also confirm that polyurethane can densely encapsulate waste rubber powder. The physical properties experiment of bitumen shows that composite modifiers can increase the softening point and viscosity of bitumen but reduce the ductility and penetration of bitumen. Moreover, it was also found that composite modifiers can significantly improve asphalt mixtures’ resistance to permanent deformation and moisture damage. This can be attributed to the increase in the consistency of the asphalt binder due to the composite modifier. However, the anti-cracking properties of asphalt mixtures will be destroyed if the content of the composite modifier is too high. Therefore, it is necessary to balance the high and low temperature properties of asphalt mixtures when determining the dosage of composite modifiers in practical engineering. The results of this paper can provide a reference for the green application of waste-rubber-powder-modified bitumen.

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“…With the introduction of solid waste disposal policies around the world, the recycling of scrap tires has received more and more attention. 7,8 Preparing scrap tires into rubber powder (RP) and using it as a filler 9,10 is a simple, straightforward, lowcost, and potentially valuable method compared with reclamation 11,12 or pyrolysis. 13,14 Waste rubber powder (WRP) has been applied to fill a wide range of materials with specific performance improvements.…”

Section: Introductionmentioning

confidence: 99%

Enhancing interface adhesion between waterjet‐produced rubber powders and natural rubber by wet‐mixing method

Guo,

Liu,

Bai

et al. 2024

J of Applied Polymer Sci

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The addition of rubber powder (RP) to natural rubber (NR) matrix using the dry mixing method leads to uneven distribution and poor interface bonding while the wet mixing method is not feasible due to the hydrophobic nature of the RP surface. To address this issue, we developed a method for producing RP with weakened hydrophobicity on the surface by high‐pressure waterjet and successfully achieved even distribution of the waterjet‐produced rubber powders (WPRPs) in NR and strong interface adhesion between WPRPs and NR by the wet mixing method. The properties of NR/WPRP composites were tested and characterized carefully. When adding 6 phr of 140‐mesh WPRPs in the NR matrix, the tensile strength and elongation at break of the NR/WPRP composites were 30.2 MPa and 627.2%, respectively, which were 4% and 7% higher than NR without WPRPs. Moreover, the anti‐abrasion property of the NR/WPRP composite was also strengthened by the addition of WPRPs. Our findings demonstrate that recycling waste rubber through a reasonable recycling method can not only reduce material waste and alleviate environmental pollution but also enhance the performance of the raw rubber, which offers significant economic benefits.

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Grafting waste rubber powder and its application in asphalt

Cited by 36 publications

References 27 publications

Evaluation and Correlation Analysis of the Rheological Properties of Ground Tire Rubber and Styrene Butadiene Styrene Compound-Modified Asphalt

Evaluation and Correlation Analysis of the Rheological Properties of Ground Tire Rubber and Styrene Butadiene Styrene Compound-Modified Asphalt

Characteristics of Polyurethane/Waste Rubber Powder Composite Modifier and Its Effect on the Performance of Asphalt Mixture

Enhancing interface adhesion between waterjet‐produced rubber powders and natural rubber by wet‐mixing method

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