High-viscosity modified asphalt mixtures for double-layer porous asphalt pavement: Design optimization and evaluation metrics

Hu, Jianying; Ma, Tao; Zhu, Yuhao; Huang, Xiaoming; Xu, Jianchun; Chen, Libiao

doi:10.1016/j.conbuildmat.2020.121893

Cited by 38 publications

(8 citation statements)

References 30 publications

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“…However, porous asphalt concrete has been more and more used in pavement materials with the advancements in pavement green technology [15,16]. Therefore, modified asphalt with high viscosity is commonly applied in porous asphalt concrete [17,18]. At present, modified asphalt with high viscosity is mainly fabricated using a high content of SBSMA (6.0-12.0%) [19].…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

et al. 2022

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To investigate the effect of styrene-butadiene-styrene (SBS) modifier content on the viscoelastic behavior of SBS-modified asphalt (SBSMA) at different temperatures and phase structures, the star SBS modifier was chosen to fabricate seven types of SBSMA with different contents. Multiple stress creep recovery (MSCR), linear amplitude sweep (LAS), and low-temperature frequency sweep tests were adopted to study the influence of SBS modifier content on the viscoelastic performance of SBSMA at high to low temperatures. The SBSMA’s microstructure with different contents was investigated using a fluorescence microscope. The results indicated that the change in non-recoverable creep compliance and creep recovery rate was bounded by 4.5% content at high temperatures, with an apparent turning point. The changing slope of content at less than 4.5% was much higher than that of the content greater than 4.5%. At medium temperatures, the fatigue life of SBSMA increased exponentially with the rising modifier content. The rate of increase in fatigue life was the largest as the content increased from 4.5% to 6.0%. At low temperatures, the low-temperature viscoelastic property index G (60 s) of SBSMA decreased logarithmically as the modifier content increased. In terms of the microscopic phase structure, the SBS modifier gradually changed from the dispersed to the continuous phase state with the increasing SBS modifier content.

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Section: Introductionmentioning

confidence: 99%

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

et al. 2022

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“…At present, asphalt pavement has been widely used in municipal roads and high-grade highways around the world due to its advantages of smooth running, comfort, no noise, no dust, etc. It can also better transfer the load generated by vehicles [1][2][3]. However, due to the short-term aging effect of the asphalt mixture in the mixing, transportation and paving process, and the long-term and ultra-long-term aging effect in the process of use after completion and opening to traffic [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on low-temperature crack resistance and water stability of polyester fiber asphalt mixture

Niu

Chen

2022

Mater. Res. Express

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In order to study the influence of different aging conditions on the low-temperature crack resistance and water stability of polyester fiber asphalt mixture. Prepare standard Marshall specimens of asphalt mixture with 0.4 % polyester fiber doping, and carry out water immersion Marshall test and low temperature splitting test through indoor asphalt mortar aging, asphalt mixture short-term aging and long-term aging. The results show that: under the three aging conditions, when the water immersion and low temperature time are fixed, with the increase of the aging degree, the water stability and low temperature crack resistance of the asphalt mixture decrease. When the immersion time is 2 h, the stability of asphalt mortar aging and short-term aging decreases by 6.0% and 11.8%, respectively, compared with unaging, but the long-term aging is only 3.6% lower than the short-term aging. When the temperature is -5℃, the split tensile strength of asphalt mortar aged and short-term aged increases by 4.24% and 14.35%, respectively, compared with unaging, while long-term aging only increases 4.18% compared with short-term aging. This indicates that the short-term aging condition has the most significant effect on the water stability and low-temperature crack resistance of polyester fiber asphalt mixes. At the same time, this study established a regression equation between the test temperature and the low temperature evaluation index through quadratic fitting (the correlation coefficient is 0.960-0.998), and the regression relationship can be used to estimate the low temperature evaluation index at different test temperatures.

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“…The current functional asphalt pavements include noise-reducing pavement [4], permeable pavement [5,6], de-icing pavement [7], energy harvesting pavement [8][9][10][11], low heat-absorbing pavement [12], and degraded exhaust pavement [13]. At present, the functionality of asphalt pavement is mainly realized by optimizing pavement structure, adjusting mixture gradation, adding functional materials, and embedding functional devices [14][15][16]. Among different types of functional pavement, the porous asphalt mixture (PAM) is pavement with a macroporous structure formed by adjusting gradation, which has multiple functions such as noise reduction, skid resistance, and drainage.…”

Section: Introductionmentioning

confidence: 99%

Composition Optimization and Damping Performance Evaluation of Porous Asphalt Mixture Containing Recycled Crumb Rubber

Quan

Sun

2022

Sustainability

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Composition optimization of the asphalt mixture of pavement is one effective measures to reduce the harm of traffic noise. To improve the noise reduction effect of porous asphalt mixture (PAM) and promote the recycling of crumb rubber in highway engineering, the preparation parameters of high-viscosity modified asphalt for PAM were optimized in this study, and the mixture gradation was optimized based on the unbalance force and contact force of mixed aggregate. The effects of crumb rubber content and particle size on the damping performance and dynamic shear modulus of the mixture were studied. The effects of different preparation parameters on the performance of the PAM were comprehensively evaluated based on the orthogonal test, and preparation parameters of PAM were recommended. The results show that with the increase of crumb rubber content, the damping ratio of the mixed aggregate increases gradually. The addition of crumb rubber is conducive to improving the damping performance and toughness of the PAM, but it has an adverse impact on the bearing capacity. Under the condition of low strain, the damping ratio of the mixed aggregate containing 2–5 mm crumb rubber is 1.2–5 times that of the mixed aggregate containing 0.6–1 mm crumb rubber. The recommended optimum content of crumb rubber in PAM is 4%, and the optimum particle size of alternative aggregate is 2.36–4.75 mm. The significant factors affecting Marshall stability are rubber particle content, asphalt aggregate ratio, mixing temperature, compaction times, and forming temperature. The rational utilization of crumb rubber in PAM is of positive significance to promoting the green development of highway construction and the harmless treatment of waste resources.

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High-viscosity modified asphalt mixtures for double-layer porous asphalt pavement: Design optimization and evaluation metrics

Cited by 38 publications

References 30 publications

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

Viscoelastic Behavior and Phase Structure of High-Content SBS-Modified Asphalt

Effect of aging on low-temperature crack resistance and water stability of polyester fiber asphalt mixture

Composition Optimization and Damping Performance Evaluation of Porous Asphalt Mixture Containing Recycled Crumb Rubber

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