Micro-structural and rheological characteristics of SBS-asphalt blends during their manufacturing

Larsen, Diego Omar; Alessandrini, José Luis; Bosch, Alejandra; Cortizo, M. Susana

doi:10.1016/j.conbuildmat.2009.03.008

Cited by 146 publications

(49 citation statements)

References 20 publications

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“…For SBS, its elastomeric phase can absorb the oil fraction of asphalt and swell it. A continuous polymer phase forms that can improve the performances of asphalt [23,24]. The network structure of SBS modified asphalt is more stable than diatomite modified one.…”

Section: Its Resultsmentioning

confidence: 98%

“…Furthermore, CRSSMA possesses the highest stiffness modulus value, while CRSMA has the lowest one. It is because diatomite modified asphalt and SBS modified one have higher cohesion ability than the neat one [23], which can lower the degree of internal damage and also the bearing capacity for mixture. Similarly, network structure of SBS modified asphalt presents superior performance than diatomite modified one.…”

Section: Itsm Resultsmentioning

confidence: 99%

“…It can effectively absorb the lower molecular group and lower polar aromatic molecules of asphalt to form thicker asphalt film and anchorage structure around aggregates and crumb rubber particles, which can increase the contact area and decrease the air voids between aggregates and rubber particles. According to the results of SBS modified asphalt by Larsen et al [23] and Adedeji et al [24], polymer phase and asphalt phase exist together. Polymer globules are dispersed homogenously in the continuous asphalt phase, which form a stable network structure.…”

Section: Air Voidsmentioning

confidence: 99%

“…Currently, SBS copolymer is the most widely used modifier for asphalt, which can absorb the oil fractions and swell them [23][24][25]. It can improve both high and low temperature performances of mixture.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Wei

Jiao

2017

Advances in Materials Science and Engineering

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Asphalt mixture is susceptible to moisture damage under the effect of freeze-thaw (F-T) cycles. In this paper, crumb rubber (CR) was used to modify stone mastic asphalt (SMA) and the effects of diatomite and styrene butadiene styrene (SBS) on antifreezing performances of crumb rubber modified SMA (CRSMA) were investigated. Regression analysis and modified grey model (MGM) were used to construct the prediction models for properties of modified mixtures. CRSMA, CR and diatomite modified SMA (CRDSMA), and CR and SBS modified SMA (CRSSMA) were prepared in laboratory, respectively. Process of F-T cycles was designed. Air void, indirect tensile strength (ITS), and indirect tensile stiffness modulus (ITSM) were measured to evaluate the antifreezing performances of CRSMA, CRDSMA, and CRSSMA. Results indicate that air voids increase with the increasing of F-T cycles. ITS and ITSM all decrease with the increasing of F-T cycles. The addition of diatomite and SBS can reduce the air void and improve the ITS and ITSM of CRSMA. CRSSMA presents the lowest air void, highest tensile strength, and largest stiffness modulus, which reveals that CRSSMA has the best F-T resistance among three different kinds of mixtures. Moreover, MGM (1, 2) models present more favorable accuracy in prediction of air void and ITS compared with regression ones.

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Section: Its Resultsmentioning

confidence: 98%

Section: Itsm Resultsmentioning

confidence: 99%

Section: Air Voidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Wei

Jiao

2017

Advances in Materials Science and Engineering

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“…In [2], an extensive summary was given that an effective polymer modification results in a thermodynamically unstable but kinetically stable system in which the polymer is partially swollen by the light components of bitumen. Some important factors, including the characteristics of the bitumen and the polymer themselves, the content of polymer and the manufacturing processes, determine the final properties of polymer modified bitumen (PMB) [5,19]. As polymer content increases, phase inversion may occur in some PMBs: from bitumen being the dominant phase to polymer becoming the dominant phase [20].…”

Section: Introductionmentioning

confidence: 99%

Polymer modification of bitumen: Advances and challenges

Zhu

Birgisson

Kringos

2014

European Polymer Journal

665

262

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Abstract. Advances and challenges in the field of bitumen polymer modification for road construction during the last 40 years are reviewed in this paper. The history of bitumen polymer modification is described chronologically. Some popular plastomers and thermoplastic elastomers in bitumen modification are discussed regarding their advantages and disadvantages, including polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate (EVA), ethylene-butyl acrylate (EBA), styrene-butadiene-styrene (SBS), styrene-isoprenestyrene (SIS) and styrene-ethylene/butylene-styrene (SEBS). Although these polymers all improve bitumen properties to some extent, there are still some drawbacks limiting the future development of bitumen polymer modification, such as high cost, low ageing resistance and poor storage stability of polymer modified bitumen (PMB). Researchers attempted various ways to remove these drawbacks. Some technical developments for removing drawbacks are reviewed in this paper, including saturation, sulfur vulcanization, adding antioxidants, using hydrophobic clay minerals, functionalization and application of reactive polymers. The future development of polymers for bitumen modification is analyzed as well. Since it is currently challenging to perfectly achieve all expected PMB properties at the same time, some compromised recommendations are given in this paper, among which greatly enhancing the properties with an acceptably high cost, significantly reducing the cost with relatively poor properties and their combinations. Functionalization is emphasized as a promising way to enhance the properties of currently used polymers and develop new-type polymer modifiers with much greater success in the future. It is also recommended that future research on bitumen polymer modification focuses more on function development towards enhancing: adhesion with aggregates, long-term performance and recyclability.

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The impact of chaotic advection on the microstructure of polymer‐modified bitumen

et al. 2014

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Owing to the high viscosity of the materials involved, mixing is often a critical step when processing polymer-modified bitumen (PMB), directly influencing the microstructure and the stability of final products. We provide experimental evidence suggesting that laminar chaotic advection may prove a valuable strategy for obtaining a homogeneous and finely interdispersed polymer-bitumen mixture in affordable time. As a case study, we investigate the mixing performance of a lab-scale flat-bottomed cylindrical vessel stirred by a radial impeller, either located symmetrically or eccentrically with respect to the vessel axis. The same geometries with a flat-disk impeller are also considered for comparison. The Mix-Norm is used in combination with image analysis as an objective measure of mixing performance. Results of mixing performance are independently validated by rheological tests. The experiments pinpoint kinematic chaos as the fundamental transport mechanism enhancing both the dispersion process and the microstructural quality of the resulting PMBs mixture. (c) 2014 American Institute of Chemical Engineers AIChE J, 60: 1870-1879, 201

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Micro-structural and rheological characteristics of SBS-asphalt blends during their manufacturing

Cited by 146 publications

References 20 publications

Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Effects of Diatomite and SBS on Freeze-Thaw Resistance of Crumb Rubber Modified Asphalt Mixture

Polymer modification of bitumen: Advances and challenges

The impact of chaotic advection on the microstructure of polymer‐modified bitumen

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