Development on recycling, aging simulation and regeneration methods of reclaimed styrene-butadiene-styrene modified asphalt

Yao, Xiaoguang; Wang, Yan; Xu, Tao

doi:10.1016/j.jclepro.2021.127767

Cited by 33 publications

(10 citation statements)

References 38 publications

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“…China has started the research work related to RAP since the 1990s and carried out the central plant hot rejuvenation technology on the Guangfo free-way in 2003. After 2010, the plant mixing hot rejuvenation technology began to be popularized and applied on a large scale, and the mixing rate of RAP generally remained at 20%-30% [4,5], which was similar to the current 20% mixing amount of RAP in the United States, but far from the average 45% RAP utilization rate in Japan [1,6].…”

Section: Introductionmentioning

confidence: 94%

“…where lgη 0 /η s is the modified viscosity deviation index; other symbols have the same meaning as (1).…”

Section: Compound Equation Of Regeneratedmentioning

confidence: 99%

“…e resource utilization of waste asphalt pavement materials has become an irresistible trend, which is determined by China's low-carbon environmental protection concept and relevant policies [1][2][3]. China has started the research work related to RAP since the 1990s and carried out the central plant hot rejuvenation technology on the Guangfo free-way in 2003.…”

Section: Introductionmentioning

confidence: 99%

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Research on Rejuvenation of Styrene-Butadiene-Styrene Block Copolymer Modified Asphalt with Rejuvenating Agent Based on Pre-Mixing Method

Wang

Zhang

et al. 2022

Advances in Materials Science and Engineering

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The traditional addition method of rejuvenating agent used in the laboratory is inconsistent with the actual situation of the project, which reduces the reliability of the test results. In this paper, the way of premixing rejuvenating agent and Reclaimed Asphalt Pavement (RAP) and extracting asphalt binder is selected, and the modification effect, mechanism, and optimal content of rejuvenating agent on Styrene-Butadiene-Styrene Block Copolymer (SBS) modified asphalt are studied. In this paper, the asphalt in RAP is recycled and restored with different content of regenerant, and the conventional technical performance and Performance Graded (PG) grade of regenerated asphalt was tested. The composite equation of regenerated viscosity of SBS-modified asphalt was analyzed, and the pavement performance of regenerated SBS-modified asphalt mixture with different content of rejuvenating agent and RAP was tested, such as high-temperature stability, low-temperature crack resistance, and water stability. Finally, the determination method of the optimal content of rejuvenating agent was discussed. The results show that it is reliable to predict the viscosity, penetration, and softening point of regenerated asphalt by viscosity logarithmic composite equation. The content of rejuvenating agent has a certain influence on the PG classification of SBS-modified asphalt, which is mainly reflected in the low-temperature critical temperature. There is a certain content of rejuvenating agent to make the high-temperature stability of regenerated SBS-modified asphalt mixture reach the maximum. When the content of rejuvenating agent reaches a certain value, the low-temperature crack resistance and water stability of regenerated SBS-modified asphalt mixture no longer increase significantly with the increase of the content of regenerant. Using the three-level determination method of the optimal content of rejuvenating agent proposed in this paper, the optimal content and reasonable content range of rejuvenating agent can be obtained, which makes the technical performance of regenerated asphalt, PG grade, and the pavement performance of regenerated SBS-modified asphalt mixture meet the specification requirements.

show abstract

Section: Introductionmentioning

confidence: 94%

“…where lgη 0 /η s is the modified viscosity deviation index; other symbols have the same meaning as (1).…”

Section: Compound Equation Of Regeneratedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on Rejuvenation of Styrene-Butadiene-Styrene Block Copolymer Modified Asphalt with Rejuvenating Agent Based on Pre-Mixing Method

Wang

Zhang

et al. 2022

Advances in Materials Science and Engineering

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show abstract

“…A number of studies and projects attempted to make a good application of types of polymers, meanwhile researchers evaluated and tried to maximize the benefits of use of polymers, from various aspects (e.g., high-temperature antirutting, low-temperature anti-cracking, storage stability and aging performances) [3][4][5][6][7]. Among polymers, styrene-butadiene-styrene (SBS) modified asphalt could be the preferred one, mainly due to its overwhelmingly good high-temperature anti-rutting and anti-fatigue performance as well as high strength [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Study on CR/SBS Modified Asphalt: Preparation and Performance Characterization

Song¹,

Zhang²,

Xie³

et al. 2022

Journal of Renewable Materials

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Crumble rubber (CR) can be used to prepare CR and styrene-butadiene-styrene (SBS) composite modified asphalt with a good high-and low-temperature performance, meanwhile the addition of CR could work as the substitute for SBS and help reduce the content of SBS. This study contains three main parts: effect of preparation and effect of material composition as well as rheological performance characterization. Factors during the preparation, including shearing temperature, shearing time, mixing time and swelling time, were selected, while base binder, CR content, CR particle size and SBS content in material composition were considered. The effects of these factors were assessed in terms of the conventional performance (penetration, softening point, ductility and storage stability). After identifying these effects, the sample of CR and SBS modified asphalt at the selected preparing condition and material composition (CR/SBSMA) was made, and the corresponding SBS modified and CR modified asphalt (SBSMA and CRMA) were produced for the comparing reason. Subsequently, temperature sweeps from 0°C to 80°C were utilized to depict the viscoelasticity of these modified asphalt binders by complex modulus and phase angle. Multiple stress creep recovery tests (MSCR) at 64°C and bending beam rheometer tests (BBR) at various low temperatures were employed to evaluate the high-and low-temperature performance, respectively. Results highlight that that CR/SBSMA could exhibit an excellent high-temperature performance (better than SBSMA), and a good low-temperature performance (reaching the level of base binder).

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“…Among organic modifiers, styrene-butadiene-styrene (SBS) is the most commonly used modifier. SBS-modified asphalt exhibits excellent road performance, as well as adequate high-and low-temperature properties that fulfil the requirements of pavements [ 6 , 7 , 8 , 9 , 10 ]. However, due to the great difference in composition and structure between the SBS modifier and asphalt, it is difficult to form a stable system during blending and they are prone to phase separation during thermal storage [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Aging Resistance of Silica Fume/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Zhu

2021

Materials

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The influences of silica fume content and aging on the rheological properties of silica fume/styrene-butadiene-styrene composite-modified asphalts were investigated via rolling thin-film oven test simulations. The asphalts rheological properties before and after aging were measured using three-major-indices, dynamic shear rheology, and bending beam rheometer tests. Fourier transform infrared spectroscopy was used to examine the changes in the functional groups of the asphalt. The silica fume did not chemically react with the modified asphalt, and its original structure was maintained. The aging resistance improved significantly after adding the silica fume. At 6% silica fume content, the relaxation of the asphalt was the highest, indicating that the asphalt had the best low-temperature crack resistance at this mixing proportion. Furthermore, the carbonyl index value of this sample exhibited the smallest increment among all of the samples, and this asphalt sample had the strongest short-term aging resistance. Thus, the optimum silica fume content in the composite-modified asphalt was determined to be 6%. This information may be used to fabricate an asphalt mixture that can improve the service life and aging resistance of pavements.

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Development on recycling, aging simulation and regeneration methods of reclaimed styrene-butadiene-styrene modified asphalt

Cited by 33 publications

References 38 publications

Research on Rejuvenation of Styrene-Butadiene-Styrene Block Copolymer Modified Asphalt with Rejuvenating Agent Based on Pre-Mixing Method

Research on Rejuvenation of Styrene-Butadiene-Styrene Block Copolymer Modified Asphalt with Rejuvenating Agent Based on Pre-Mixing Method

Laboratory Study on CR/SBS Modified Asphalt: Preparation and Performance Characterization

Aging Resistance of Silica Fume/Styrene-Butadiene-Styrene Composite-Modified Asphalt

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