Low-temperature performance of SBS modified asphalt mixture in high altitude and cold regions

Zhang, Chen; Wang, Hainian; Yang, Xu

doi:10.1007/s42947-019-0005-4

Cited by 19 publications

(3 citation statements)

References 17 publications

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“…As the third generation of synthetic rubber, an SBS modifier is widely used because of its excellent thermal stability and high-temperature performance, but it still cannot avoid the problem of transportation segregation caused by poor blending compatibility, and the performance deterioration is also common [3][4][5][6]. Cortizo et al [7] indicated that the penetration of SBS modified asphalt was reduced and the softening point was raised after RTFOT.…”

Section: Introductionmentioning

confidence: 99%

Study on the Performance of SBS/Polyphosphoric Acid Composite Modified Asphalt

Li,

Guo

et al. 2024

Coatings

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To address the issue of bad compatibility between a single polymer modifier and asphalt and high preparation cost, the composite modified asphalt with polyphosphoric acid (PPA) and SBS as a modifier was prepared. Basic properties, viscosity characteristics, high-temperature and low-temperature rheological performance, and aging-resistant performance of SBS/PPA composite modified asphalt were comprehensively evaluated, and the best content of PPA was obtained through the experimental results below. By performing an infrared spectrum test and a scanning electron microscope test, structural changes and modifying mechanisms of composite modified asphalt were analyzed. The results indicate the optimal PPA content is 0.75%. After adding PPA, the penetration and ductility of composite modified asphalt were reduced, while the softening point increased. At 135 °C, the viscosity was 1.2 times that of SBS modified asphalt. The average weight loss ratio was 0.163%. When the content of PPA was 0.75% and 1%, the rutting factor increased significantly. Therefore, PPA can not only improve the thermal oxidation aging resistance of asphalt, it can also improve the shear resistance, high-temperature performance, and temperature sensitivity of asphalt. Between 1027 and 1150 cm−1, the composite modified asphalt forms a new absorption peak, and from 1610 cm−1, the absorption peak presents an upward trend, suggesting that PPA reacts chemically with asphalt, produces the new substance, and also increases a large number of hydrocarbon components with chain structure. The surface appearance of the compound modified asphalt gradually presents a smooth wrinkle state due to the increase of PPA, so the issue of easy segregation of SBS in asphalt is improved.

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Section: Introductionmentioning

confidence: 99%

Study on the Performance of SBS/Polyphosphoric Acid Composite Modified Asphalt

Li,

Guo

et al. 2024

Coatings

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“…2024, 14, 5047 2 of 15 the asphalt material, reducing its temperature sensitivity and greatly improving the performance of the asphalt pavement [10,11]. At the same time, research has also found that the dosage of the SBS modifier has different effects on asphalt, and an excessive or insufficient dosage may also be detrimental to asphalt modification [12][13][14]. During the service life of pavements, the alternating effects of traffic loads and environmental factors make SBS-modified asphalt more susceptible to aging, which is caused by the interaction of the oxidation of aged asphalt and degradation of copolymers, leading to changes in the chemical structure of mastics [6,15].…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Temperature–Humidity Coupling Cycle on the Performance of Styrene Butadiene Styrene Polymer-Modified Asphalt Mastic

Ma,

Su,

Tan

et al. 2024

Applied Sciences

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To study the variation laws and effects of asphalt mastic under the cooperative interaction of different temperatures and humidities, cyclic conditions for different temperature ranges were set to conduct indoor experimental simulations of thermal–humidity coupling cycles. Firstly, the macroscopic performance changes in styrene butadiene styrene polymer (SBS)-modified asphalt mastic were evaluated by the penetration test, softening point test, ductility test, Brookfield rotational viscosity test, and double-edge notched tensile (DENT) test; then, the mechanism of performance changes was explored from the perspective of chemical composition by combining this with Fourier transform infrared spectroscopy (FTIR). The research results show that with the increase in thermal–humidity coupling cycles, SBS-modified asphalt mastic exhibited aging phenomena such as hardening and embrittlement, and its macroscopic performance deteriorated; under the same test conditions, the interval with a higher temperature difference had a greater impact on the performance of the mastic; the sulfoxide index (IS=O) of SBS-modified asphalt mastic increases after thermal–humidity coupling cycles, while the isoprene index (IB) decreases.

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“…The results indicated that the multi-axial strength decayed significantly after 20 freeze-thaw cycles [17]. Wang et al conducted a freeze-thaw split to evaluate the flexural resistance damage caused by freeze-thaw cycles [6,15,18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Fractal Analysis of the Fracture Evolution of Freeze-Thaw Damage to Asphalt Concrete

Wang

et al. 2019

Materials

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AC (asphalt concrete)-13, as the main material used in pavement construction, has been applied widely in seasonal frozen areas. In order to understand the fracture mechanism in the freeze-thaw (F-T) damage process, the mesoscale structure of AC-13 is obtained by computed tomography (CT). The fractal dimension of cracks is used as a damage evaluation index. Most previous studies have only focused on the fractal dimensions of whole cracks, while ignoring the fractal tectonic process and the self-similarity degree of a single fracture. Therefore, in this study, the intrinsic mechanism of fractures and damage were investigated. In addition, the critical crack stress and fracture toughness models of a single fracture in a freeze-thaw damage process are established for AC-13. The results indicate that in terms of the critical crack stress and fracture toughness, with the increase of F-T times, there is an obvious decreasing trend. The fracture model can effectively describe the fracture toughness calculated by ABAQUS in the process of freeze-thaw cycles.

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Low-temperature performance of SBS modified asphalt mixture in high altitude and cold regions

Cited by 19 publications

References 17 publications

Study on the Performance of SBS/Polyphosphoric Acid Composite Modified Asphalt

Study on the Performance of SBS/Polyphosphoric Acid Composite Modified Asphalt

The Effect of the Temperature–Humidity Coupling Cycle on the Performance of Styrene Butadiene Styrene Polymer-Modified Asphalt Mastic

Fractal Analysis of the Fracture Evolution of Freeze-Thaw Damage to Asphalt Concrete

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