Effect of the thermal degradation of SBS copolymers during the ageing of modified asphalts

Cortizo, M. Susana; Larsen, Diego Omar; Bianchetto, Hugo; Alessandrini, José Luis

doi:10.1016/j.polymdegradstab.2004.05.006

Cited by 293 publications

(115 citation statements)

References 16 publications

Supporting

Mentioning

109

Contrasting

Unclassified

Order By: Relevance

“…Polymer modified asphalts were developed to overcome distress problems. [1][2][3] The use of polymers as additives has shown to greatly improve the performance of conventional asphalt binders, 4 i.e., greater resistance to rutting and fatigue as well as decrease of the thermal susceptibility. In addition, it promotes increased resistance to cracking at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Asphalt binders modified by SBS and SBS/nanoclays: effect on rheological properties

Pamplona¹,

Amoni²,

Alencar³

et al. 2012

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Neste trabalho, investigou-se o efeito da vermiculita e montmorilonita organicamente modificadas (OVMT e OMMT, respectivamente) em ligante asfáltico (AB) modificado por SBS (butadieno-estireno-butadieno). As propriedades físicas e reológicas foram avaliadas para AB, 4,0% SBS MB e nanocompósitos AB modificados por 2,5% SBS com 2,5% de organoargilas. Os ligantes modificados (MB) resultaram no aumento do módulo complexo (G*) e na redução do ângulo de fase (δ), o que significa maior resistência destes à deformação permanente. A viscosidade, penetração e suscetibilidade térmica foram adequadas. Nos diagramas black, observou-se que o efeito da presença das nanoargilas OVMT e OMMT foi semelhante ao efeito da Cloisite ® . As propriedades reológicas dos nanocompósitos foram comparáveis às do 4,0% SBS MB, identificando uma redução de custos, dado o potencial de substituição de polímero pela argila. A presença da OVMT melhorou a estabilidade à estocagem do SBS MB, um resultado importante, visto que a separação de fases é um dos maiores obstáculos ao uso do SBS na pavimentação.In this work, it was investigated the effect of organically modified vermiculite and montmorillonite (OVMT and OMMT, respectively) in asphalt binders (AB) modified by SBS (styrene-butadiene-styrene). The physical and rheological properties were performed for AB, 4.0% SBS MB and nanocomposite AB modified by 2.5% SBS with 2.5% of organoclays. The modified binders (MB) result in the enhancement of complex modulus (G*) and reduction of phase angle (δ), which means greater resistance to permanent deformation. The viscosity, penetration and thermal susceptibility were appropriate. The black diagrams show that the effect of nanoclays OVMT and OMMT was similar to the effect of Cloisite ® . The rheological properties of the nanocomposite were comparable to the 4.0% SBS MB, identifying a cost reduction due to the potential of replacing polymer with clay. The presence of OVMT improved the storage stability of SBS MB, an important result, as the phase separation is a major obstacle to the use of SBS in paving. Keywords: asphalt binder, SBS, montmorillonite, vermiculite, rheology IntroductionPetroleum asphalt has been widely used as binder in road pavements to provide adhesive and protective coating to aggregates. The rheological behavior of a binder is complex, varying from viscous to elastic depending on loading rate and temperature. It has to be fluid enough at high temperature when pumped and mixed with aggregates and has to be stiff enough at service temperature so that, it can resist rutting. In addition, it can not be too stiff in order to avoid thermal cracking. Thus, rheological properties of asphalt binders are of major concern since they are directly related to the field performance.For many years, conventional pure asphalt performed satisfactorily. Due to the increase of traffic loads and also to environmental factors, pure asphalt does not always perform as it is expected. Polymer modified asphalts were developed to overcome distress problems. 1-3 The...

show abstract

Section: Introductionmentioning

confidence: 99%

Asphalt binders modified by SBS and SBS/nanoclays: effect on rheological properties

Pamplona¹,

Amoni²,

Alencar³

et al. 2012

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…The first field mainly focused on the microstructure, deformation, cracking, ageing and fatigue of PMB [64][65][66][67][68][69][70][71][72][73][74][75][76][77]. Even now, there are still some academic debates in this field.…”

Section: Historical Perspectivementioning

confidence: 99%

Polymer modification of bitumen: Advances and challenges

Zhu

Birgisson

Kringos

2014

European Polymer Journal

665

262

View full text Add to dashboard Cite

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.

show abstract

“…But it will get aging inevitably after a period of time [1][2][3]. For SBS modified asphalt, its aging includes the aging of polymer SBS as well as the aging of the matrix asphalt itself [4,5]. As waste pavement construction materials, aging SBS modified asphalt still has high recycling value.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Evaluation of Aging Behaviour of SBS Modified Asphalt

Wang

Qin

Huang

et al. 2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

To study the effect of aging SBS modified asphalt on the performance of asphalt pavement, aging at various times and temperatures was conducted with thin film oven, and then tests were made about the penetration, softening point, ductility, viscosity, toughness, and fluorescence microscopy of modified asphalt with different aging levels. The results show that, with the increasing of aging time, the penetration and ductility of modified asphalt decrease while its softening point and viscosity increase, and the variation trend of the toughness and tenacity is related to the aging temperature; the aging dynamic model with viscosity as parameter can well characterize the aging process of modified asphalt; at microlevel, with the decreasing of SBS particle size, the uniformity of particle size is better. Analysis of macroscopic properties, microscopic characteristics, and significance shows that the SBS particle area ratio has a significant correlation with tenacity as the aging temperature changes. When the aging temperature is 163 ∘ C, the SBS particle area ratio still has a significant correlation with tenacity as the aging time changes.

show abstract

Effect of the thermal degradation of SBS copolymers during the ageing of modified asphalts

Cited by 293 publications

References 16 publications

Asphalt binders modified by SBS and SBS/nanoclays: effect on rheological properties

Asphalt binders modified by SBS and SBS/nanoclays: effect on rheological properties

Polymer modification of bitumen: Advances and challenges

Laboratory Evaluation of Aging Behaviour of SBS Modified Asphalt

Contact Info

Product

Resources

About