Polymer blends for enhanced asphalt binders

Aı̈t-Kadi, A.; Brahimi, B.; Bousmina, Mosto

doi:10.1002/pen.10568

Cited by 121 publications

(88 citation statements)

References 12 publications

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“…The rheological behaviour shown in Figure 8a is, at least in part, quite similar to that found in unmodified and polymer modified binders (see, for instance, [9,36,37,38]. Transition to the glassy region (delimited by a maximum in the E" curves) appears at high frequencies, and a crossover point between E' and E'', at intermediate frequencies, is also observed.…”

Section: Linear Viscoelasticity Of Modified Bituminous Masticssupporting

confidence: 70%

Rheological behaviour of polymer-modified bituminous mastics: A comparative analysis between physical and chemical modification

Shivokhin

García‐Morales

Partal

et al. 2012

Construction and Building Materials

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Mastic, a bitumen/filler blend which naturally forms when bitumen is mixed with aggregates is the actual product used to bind coarse mineral particles in the asphalt mixtures. As a result, the characterisation of mastics is essential to improve the understanding of the response and performance of asphalt concrete pavements. On the other hand, the lack of experimental data concerning the behaviour of mastics and, above all, polymer-modified mastics has been lately claimed. In that sense, this work presents a comparative analysis between the effect that "physical" and "chemical" modification by polymers exert on mastics prepared by blending modified binders with different contents of calcium carbonate, ranging from 65 to 80 wt.%. Tri-block copolymer SBS and a "reactive" isocyanate-based prepolymer were used as modifying agents in the preparation of the binders. Linear viscoelasticy tests revealed that polymer type exerts, at high temperatures, a significant influence on the binder contribution to the overall rheological properties of the resulting mastic.

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Section: Linear Viscoelasticity Of Modified Bituminous Masticssupporting

confidence: 70%

Rheological behaviour of polymer-modified bituminous mastics: A comparative analysis between physical and chemical modification

Shivokhin

García‐Morales

Partal

et al. 2012

Construction and Building Materials

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“…In addition, the E a values can also be obtained through fitting shift factors using the Arrhenius equation during the process of constructing master curves (21). Others reported similar E a values using a shift factor-based Arrhenius equation as the viscosity-based Arrhenius equation did (21,22). This is mainly because different rheological parameters are interrelated.…”

Section: Relationship Between Rheology and Flow Activation Energymentioning

confidence: 98%

Rheological Behavior and Its Chemical Interpretation of Crumb Rubber Modified Asphalt Containing Warm-Mix Additives

Wang

Liu

Apostolidis

et al. 2018

Transportation Research Record

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The microstructure and chemical composition of asphalt binders have a significant effect on their rheological properties and, therefore, their performance as road paving binders. This study aims to investigate the effects of warm-mix asphalt (WMA) additives, organic type and chemical type, on the rheological properties and chemical internal structure of base asphalt and crumb rubber modified asphalt (CRMA). A set of dynamic shear rheometer (DSR) tests was conducted to obtain the rheological parameters (e.g., complex viscosity, complex modulus, phase angle) of asphalt binders. The flow activation energy was calculated from Arrhenius equation based on viscosity data to rank the thermal susceptibility. Black diagrams and master curves of complex modulus and phase angle were utilized to analyze the rheological properties. The molecular weight distributions of asphalt binders were inverted from the phase angle master curve to evaluate the molecular weight characteristics. It was found that the the addition of crumb rubber into base asphalt improves the rheological properties of enhanced modulus and elasticity. Organic and chemical types of WMA additives have different chemo-physical effects on both base asphalt and CRMA. Phase angle inversion method provides a powerful tool to monitor the molecular structure change and, therefore, the chemo-physical interactions of asphalt binders induced by modifications. Finally, there is a good correlation between flow activation energy and molecular weight.Recycling crumb rubber from end-of-life tires into asphalt paving has been applied for several decades for its tremendous economic and environmental benefits. It is reported that the incorporation of crumb rubber modifier (CRM) into asphalt binders can improve the overall performance of asphalt pavements (1, 2), such as improved aging and oxidation resistance, greater resistance to fatigue/thermal cracking and rutting, lower noise generation, higher skid resistance, and so forth. The above-improved performance of rubberized asphalt pavement relies on the interaction of CRM with asphalt. Depending on different interaction parameters (temperature, time and mixing rate, etc.), rubber-asphalt interaction is generally related to two mechanisms (3, 4): (a) swelling of CRM particles in asphalt matrix through absorbing the light aromatic oils of asphalt, and (b) degradation (devulcanization and depolymerization) of CRM through the release of its components into the liquid phase of asphalt.The improvement of the rheological properties of the rubberized asphalt binders has been observed after the interaction of CRM with asphalt (5). However, due to the high viscosity of rubberized binders, high mixing and compaction temperatures are required to achieve desirable workability and density of asphalt mixtures. In addition, the consequent high emissions and compromised work conditions during the construction process of rubberized asphalt pavement have been criticized (6). Warm-mix asphalt (WMA) technologies are developed to substantia...

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“…The effect of a polymer usually starts to be significant at concentrations of about 4-6%. Polymers that have been commonly used to modify bitumen include styrene-butadiene-styrene copolymer (SBS), styrene-butadiene rubber (SBR), styrene-isoprene-styrene copolymers, ethylene vinyl acetate (EVA), polyethylene (PE), ethylene-butyl acrylate and others [11][12][13][14].…”

Section: Elsayed M Elnaggar Et Almentioning

confidence: 99%

Nano Reactive Polymer Based on Polyaniline as Asphalt Modifier for Anticorrosion Application

Elnaggar

El-Sherif

Migahed

et al. 2011

Al-Azhar Bulletin of Science

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Recently, the application of nanotechnology in the corrosion protection of metals has gained momentum. On the other hand, polymers are used as corrosion inhibitor coatings that are physically, chemically or electrochemically deposited on the metal substrate. Although asphalt has low cost, high cohesive nature, rheological properties and high thermal resistance but it is not practically used on a large scale in anticorrosion applications. So, the aim of this research is to use the nanotechnology science in preparing modified asphaltic materials to produce new and more qualified anti-corrosive coatings. To achieve this aim, nanoparticles of polyaniline (PANI-H2SO4) using template free polymerization method are prepared and characterized by FTIR, XRD and SEM. Another nonreactive polymer of type low density poly ethylene (LDPE) has been used for comparison purpose. The two types of modifiers have mixed with asphalt of type 85/25 in different percentages as 2, 4, 6, 8& 10٪by the weight of the virgin bitumen. The modified asphalt samples have physically tested and the morphology by SEM has conducted. The ability of modified bitumen samples to serve as corrosion protective coatings for carbon steel has examined by open circuit potential-time (Eocp-time), and potentiodynamic polarization in 0.5 M HCl solution. The results revealed that all the prepared samples show a good behavior as anticorrosive materials and bitumen modified by PANI-H2SO4 is the most qualified material as it had protection efficiency of 99.996 % with respect to uncoated CS while the protection efficiency of PMA/LDPE is 99.98 %.

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Polymer blends for enhanced asphalt binders

Cited by 121 publications

References 12 publications

Rheological behaviour of polymer-modified bituminous mastics: A comparative analysis between physical and chemical modification

Rheological behaviour of polymer-modified bituminous mastics: A comparative analysis between physical and chemical modification

Rheological Behavior and Its Chemical Interpretation of Crumb Rubber Modified Asphalt Containing Warm-Mix Additives

Nano Reactive Polymer Based on Polyaniline as Asphalt Modifier for Anticorrosion Application

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