A review of phase structure of SBS modified asphalt: Affecting factors, analytical methods, phase models and improvements

Chen, Mingyuan; Geng, Jiuguang; Xia, Caiyun; He, Leilei; Liu, Zhuo

doi:10.1016/j.conbuildmat.2021.123610

Cited by 116 publications

(30 citation statements)

References 168 publications

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“…This reaction can enhance the hydrophilic nature of the asphalt. Furthermore, as the number of freeze–thaw cycles increases, SBS degrades and loses its cross–linked network [ 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

Zhang

Guo

2022

Materials

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Based on laboratory tests, the objective of this study is to assess long-term road performance and to predict deicing longevity of self-ice-melting asphalt pavements containing salt-storage materials. Dry–wet cycles and freeze–thaw cycles were used to treat the specimens at different durations. The long-term road performance of self-ice-melting asphalt mixtures was evaluated by freeze–thaw splitting tests, high-temperature rutting tests, and low-temperature beam bending tests. In addition, the influences of coefficients of void ratio, temperature, vehicle load, crack, and Mafilon (MFL) content on salt precipitation were quantified by conductivity tests, and single consumption of snow and ice melt was quantified by total dissolved solids (TDS) tests. The results show that the long-term water stability, long-term high-temperature stability, and long-term low-temperature crack resistance of self-ice-melting asphalt pavements tended to decrease as the number of dry–wet cycles and freeze–thaw cycles increased. Freeze–thaw cycles exerted deeper influences on the deterioration of road performance than dry–wet cycles, especially on water stability. With increased void ratio and temperature, salt precipitation was accelerated by 1.1 times and 1.5~1.8 times, respectively. Under vehicle loads and cracks, salt precipitation was accelerated by 1.5 times and 1.65 times, respectively. With decreased MFL content, salt precipitation slowed down by 0.54 times. Finally, based on the proportion of each factor relative to the whole life cycle of the pavement, a dicing longevity prediction model was established considering the above factors.

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Section: Resultsmentioning

confidence: 99%

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

Zhang

Guo

2022

Materials

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“…where t is the test time (s), t i is the current test time, t i−1 is the previous test time, N is the total number of tests, C(t) is the integrity parameters, which is calculated by Equation (8).…”

Section: Fatigue Lifementioning

confidence: 99%

“…With the increasing traffic load, a neat asphalt binder will not be enough to fulfill the requirements of traffic development [5,6]. Styrenebutadiene-styrene (SBS)-modified asphalt (SBSMA) is universally applied because of its properties such as excellent durability, anti-ageing, fatigue resistance, and water damage resistance [7,8]. SBSMA has been utilized extensively on national highways in China [9,10].…”

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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“…Phase separation could occur caused by the asymmetric molecular dynamics among the components in the composite modifier [ 157 ]. The modifier and asphalt binder are also incompatible due to the great differences in the density, structure, and molecular weight, from the point of view of thermodynamics [ 158 ]. Only when the compatibility among the polymers and asphalt is high enough to avoid phase separation in the binder can a proper, good quality pavement be achieved [ 21 ].…”

Section: Challenges Of Using Waste Plastics With Asphaltmentioning

confidence: 99%

Using Waste Plastics as Asphalt Modifier: A Review

Zhao

2021

Materials

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The use of waste products in the production of asphalt binders and asphalt mixtures has become widespread due to economic and environmental benefits. In particular, the use of recycled waste plastic in asphalt binders and mixtures is gaining more attention. This review presents analyses and comparisons of various forms of waste plastic used in asphalt modification, and approaches to incorporating waste plastic into asphalt mixtures, both for single and composite modifications. It focuses on the properties of waste plastics, asphalt binders, and asphalt mixtures. Overall, the incorporation of plastic waste into asphalt mixtures can significantly improve high-temperature performance and has potential economic and environmental benefits. The performance of modified asphalt is highly dependent on multiple factors, such as waste sources, waste plastic dosages, blending conditions, and the pretreatment methods for waste plastic. There are different ways to apply waste plastics to blend into a mixture. In addition, this paper discusses the current challenges for waste plastic-modified asphalt, including the stability, low-temperature performance, modification mechanism, and laboratory problems of the blends. The use of chemical methods, such as additives and functionalization, is considered an effective way to achieve better interactions between waste plastics and the binder, as well as achieving a higher sufficiency utilization rate of waste plastics. Although both methods provide alternative options to produce waste plastic-modified asphalt with stability and high performance, the optimal proportion of materials used in the blends and the microcosmic mechanism of composite modified asphalt are not clear, and should be explored further.

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A review of phase structure of SBS modified asphalt: Affecting factors, analytical methods, phase models and improvements

Cited by 116 publications

References 168 publications

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

Investigation of Long-Term Performance and Deicing Longevity Prediction of Self-Ice-Melting Asphalt Pavement

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

Using Waste Plastics as Asphalt Modifier: A Review

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