Mechanical performance of asphalt rubber mixtures with warm mix asphalt additives

Rodríguez-Alloza, Ana María; Gallego, Juan

doi:10.1617/s11527-017-1020-z

Cited by 30 publications

(16 citation statements)

References 11 publications

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“…Although the mixture manufactured at reduced temperature had a good behaviour with a slightly higher ITSR, this mixture reached lower Indirect Tensile Strength (ITS). This decrease in the resistance agrees with other studies [27]. The ITS of the dry samples was significantly lower in the case of the mixtures with wax (p-values are shown in Table 9), although this parameter could have been affected by the difference in the percentage of voids.…”

Section: Determination Of Void Characteristics Of Bituminous Specimensupporting

confidence: 92%

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Lastra-González

Calzada-Pérez

Vega-Zamanillo

et al. 2017

Construction and Building Materials

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This paper studies the design and characterization of a PA mixture with 91% of EAF slag, using a commercial CRM binder. A fatty acid amide wax was added to decrease the mixture manufacturing temperature. The mechanical performance of the designed mixtures was studied with the determination of void characteristics, water sensitivity, and particle loss in dry and wet conditions. Finally, their compactability, stiffness and fatigue resistance were also analysed. The addition of the wax allowed to decrease the manufacturing temperature 15 °C. Besides, the wax increased the complex modulus of bitumen, increasing also the elastic component and decreasing the thermal susceptibility, although these modifications did not have a significant impact in the mechanical performance of the mixture.

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Section: Determination Of Void Characteristics Of Bituminous Specimensupporting

confidence: 92%

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Lastra-González

Calzada-Pérez

Vega-Zamanillo

et al. 2017

Construction and Building Materials

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“…The strategic highway research program generally applies DSR test in the Superpave technical specification for viscoelastic analysis of asphalt samples, which has been well recognized and adopted by related industries . Through the DSR test, the phase angle δ and the complex modulus G * of asphalt sample at different temperatures and different shear frequencies can be directly obtained . The detailed information of the test are specified in ASTM D7175 standard…”

Section: Resultsmentioning

confidence: 99%

Synthesis and evaluation of high‐temperature properties of butylated graphene oxide composite incorporated SBS (C₄H₉‐GO/SBS)‐modified asphalt

Duan

Muhammad

et al. 2019

J of Applied Polymer Sci

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Graphene nanoparticles (GNPs) added styrene-butadiene-styrene (SBS)-modified asphalt suffers from serious compatibility and agglomeration problems. To tackle these problems, in this study, graphene oxide (GO) was mixed with bromobutane to synthesize butylated graphene oxide (C 4 H 9 -GO) composite, which was in turn compounded with SBS for the preparation of C 4 H 9 -GO/SBS-modified asphalt. C 4 H 9 -GO/SBS-1.0-modified asphalt exhibited the best performance in terms of 11.4% increased softening point, 19.3% increased ductility, and 10.2% reduction in penetration as compared to 5% SBS-modified asphalt. Dynamic shear rheometer and multistress creep recovery tests showed that at 1.0% C 4 H 9 -GO contents, C 4 H 9 -GO/SBS composite-modified asphalt exhibited the best high-temperature performance and low stress sensitivity. Microscopic characterization of C 4 H 9 -GO via Fourier transform infrared spectroscopy, X-ray diffraction, and Raman spectroscopy revealed successful bonding between C 4 H 9 and GO, increasing interlayer spacing in GO. Atomic force microscopy and scanning electron microscopy analysis showed the superior elasticity of C 4 H 9 -GO than GNPs. Differential scanning calorimetry analysis indicated that C 4 H 9 -GO sheets can be stabilized by SBS through π-π stacking with the polystyrene chains. This study awarded to the preparation of novel C 4 H 9 -GO/SBS-modified asphalt with superior mechanical property can be deemed of potential value and applications in construction and highway industries.GNPs have also been applied as modifiers for the preparation of modified asphalts. Han et al., 10 via in situ polymerization strategy, synthesized polystyrene-GNPs (PS-GNPs) and added them to styrene-butadiene-styrene (SBS)-modified asphalt, which exhibited improved softening point and high-temperature rutting resistance performance than the parent asphalt. The National Cooperative Highway Research Program found that compared to conventional asphalt binders, GNPs-enhanced asphalt binders exhibit excellent flexural strength at low temperatures, but the fracture energy of Additional Supporting Information may be found in the online version of this article.

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“…Through a study of the Marshall compaction curve, they determined this temperature reduction, and they verified that there was a slight worsening in the resistance to plastic deformation, while the rest of the properties remained approximately constant. Rodríguez-Alloza and Gallego [15,16] found that the working temperature of a gap-graded mixture with rubber-modified bitumen could be reduced by 30 • C by adding organic waxes. However, the indirect tension stress ratio (ITSR) decreased with respect to the values for the reference mixture.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors

2020

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Stone mastic asphalt (SMA) mixtures exhibit excellent behaviour; they are highly resistant to reflective cracking and permanent deformation, as well as providing the wearing surface with an optimal texture. However, the production and compaction temperatures are similar to conventional mixtures, which means that there is a significant consumption of energy, as well as greenhouse gas emissions. Warm mix asphalt (WMA) technology, which has been developed over the last few years, might allow lower temperatures without compromising the mechanical behaviour of the mixtures. Also, over the last few decades, rubberized asphalt has proved to be effective in improving the performance and being environmentally suitable, but it requires higher production temperatures than conventional mixtures. In this study, several tests were performed to evaluate the effect of a chemical WMA additive on the compactability and water sensitivity of rubberized SMA mixtures with both the Marshall and the gyratory compactor. The investigation has shown that the gyratory compactor is more suitable for studying compactability and the water sensitivity of rubberized SMA with WMA additives.

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Mechanical performance of asphalt rubber mixtures with warm mix asphalt additives

Cited by 30 publications

References 11 publications

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Synthesis and evaluation of high‐temperature properties of butylated graphene oxide composite incorporated SBS (C₄H₉‐GO/SBS)‐modified asphalt

Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors

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Mechanical performance of asphalt rubber mixtures with warm mix asphalt additives

Cited by 30 publications

References 11 publications

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Porous asphalt mixture with alternative aggregates and crumb-rubber modified binder at reduced temperature

Synthesis and evaluation of high‐temperature properties of butylated graphene oxide composite incorporated SBS (C4H9‐GO/SBS)‐modified asphalt

Evaluation of Warm Rubberized Stone Mastic Asphalt Mixtures through the Marshall and Gyratory Compactors

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Synthesis and evaluation of high‐temperature properties of butylated graphene oxide composite incorporated SBS (C₄H₉‐GO/SBS)‐modified asphalt