Experimental study on noise reduction characteristics of polymer modified asphalt mixture

Wang, Lan; Xing, Yongming; Pan, Liqing

doi:10.1201/b13165-20

Cited by 1 publication

(6 citation statements)

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“…The content of RET, PUP and SBS are based on the mass of the neat asphalt and the contents of GWR and fibers are based on the mass of aggregate (including mineral powder). The selection of 1.5% RET is because that 1.5% RET is found to greatly improve the comprehensive performance of the neat asphalt [3]. The selection of SBS content is based on experience and previous research works.…”

Section: Methodsmentioning

confidence: 99%

“…As shown in Figure 10, the comprehensive evaluation considering performance and economy of different types of modification (10% PUP, 2.1% 80 mesh GWR and 0.2% PE fiber) was conducted using a radar chart. The increased percentages of performance parameters (SED, UFS, FS, dynamic stability, RS and TSR) and unit price of RETM were calculated, the performance data were processed by normalization using Equation (2), the price data were processed by normalization using Equation (3). The data normalization improves the reliability of the comprehensive evaluation, because the increased levels of parameters by different modifiers are dissimilar, and the analysis with the original data will highlight the role of parameters with higher increased levels and relatively weaken the role of parameters with smaller increased levels in comprehensive analysis.…”

Section: Comprehensive Evaluationmentioning

confidence: 99%

“…RET, which is produced by DuPont, is an easy-to-use and highly efficient chemical polymer modifier. Previous studies have shown that RET will form a stable structure by reacting with the nucleophilic group-carboxyl group of asphaltene [1][2][3]. This stable structure ensures good compatibility between RET and the neat asphalt and enables RETA to be stored for a long time without segregation.…”

Section: Introductionmentioning

confidence: 96%

“…This stable structure ensures good compatibility between RET and the neat asphalt and enables RETA to be stored for a long time without segregation. Besides, RETA and its mixtures have great high-temperature performance, fatigue resistance and aging resistance, which are even better than SBS modified asphalt and its mixtures [3,4]. And compared with traditional polymer modified asphalts like SBS modified asphalt, RETA is easy to prepare and only requires a small amount of RET, so it has better application prospects [4].…”

Section: Introductionmentioning

confidence: 99%

“…And compared with traditional polymer modified asphalts like SBS modified asphalt, RETA is easy to prepare and only requires a small amount of RET, so it has better application prospects [4]. However, RETM has unsatisfactory low-temperature crack resistance, which is not conducive to its application and promotion in pavement projects [3,5]. Therefore, it is necessary to take measures to improve this situation.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Low-Temperature Performance of RET Modified Asphalt Mixture with Different Modifiers

Zhang

Liu

2020

Coatings

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To improve the low-temperature performance of RET (Reactive Elastomeric Terpolymer) modified asphalt mixture (RETM), polyurethane prepolymer (PUP) was used by wet process, ground waste rubber (GWR) and fibers were used by dry process. Tests of force ductility, bending beam rheometer (BBR), differential scanning calorimeter (DSC), viscosity and multiple stress creep recovery (MSCR) were conducted to study the effects of PUP on the performance of RET modified asphalt (RETA), and beam bending test was conducted to study the effects of GWR and fibers on the performance of RETM. Then, tests of beam bending, wheel tracking, Marshall immersion, freeze-thaw splitting, and economic analysis were further conducted to compare the performance and economy of RETM modified with optimum modifiers suggested. All modifiers improve the low-temperature performance of RETM. PUP content, the content and size of GWR and the content and type of fibers significantly affect the performance of RETA or RETM respectively. After analysis, 10% PUP, 2.1% 80 mesh GWR and 0.2% polyester (PE) fiber are considered as the optimum modifiers, respectively. Comparison results show that optimum modifiers variously improve the low-temperature performance, rutting resistance and moisture susceptibility of RETM, but they slightly reduced the economy of RETM. Comprehensive evaluation shows that 2.1% 80 mesh GWR and 10% PUP are better than 0.2% PE fiber.

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Section: Methodsmentioning

confidence: 99%

Section: Comprehensive Evaluationmentioning

confidence: 99%