Influence of freeze–thaw cycles on properties of asphalt-modified epoxy repair materials

Wang, Yanping; Ye, Jiaofeng; Liu, Yanhua; Xia, Qiang; Liu, Feng

doi:10.1016/j.conbuildmat.2012.12.056

Cited by 38 publications

(22 citation statements)

References 24 publications

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“…The asphalt spherical particles were suspected to cause some localized plastic shear yielding, which resulted in the observed increase in the toughness of the epoxy resin . Similar phase separations were also found in the asphalt‐modified epoxy materials . As shown in Figure (c,d), the ATTs appeared as bright points (the ends of broken ATTs) and were dispersed uniformly in the EA composites at lower loadings in the micrographs.…”

Section: Resultssupporting

confidence: 62%

Thermal, mechanical properties, and low‐temperature performance of fibrous nanoclay‐reinforced epoxy asphalt composites and their concretes

Sun

Zhang

et al. 2014

J of Applied Polymer Sci

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Epoxy asphalt (EA) concretes have been widely used in the pavement of orthotropic steel bridge decks. The objective of this study was to figure out the enhanced effects of natural fibrous attapulgite (ATT) as a reinforced nanofiller in ATT/EA nanocomposites through a comparison of the properties of the composites with a series of various nanoclay loadings. The rheological properties, glass transition, thermal stability, mechanical properties, and morphology of the ATT/EA composites were characterized. Furthermore, the low-temperature flexibility of the ATT/EA concretes was investigated. The test results show that the addition of ATT had no significant effect on the rotational viscosity of EA in the initial stage of the curing reaction. In addition, the ATT/EA composites showed better performance than the neat one in thermal stability with a higher glass-transformation temperature. The tensile strength and elongation at break of the ATT/EA composites at a loading of 0.5 wt % ATT were 21 and 22% higher than those of the neat EA. The addition of ATTs also enhanced the low-temperature flexibility of the EA concretes.

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Section: Resultssupporting

confidence: 62%

Thermal, mechanical properties, and low‐temperature performance of fibrous nanoclay‐reinforced epoxy asphalt composites and their concretes

Sun

Zhang

et al. 2014

J of Applied Polymer Sci

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“…Zhang and Sun et al recognize the efficiency of red mud as mineral filler, three different filler materials, including limestone, hydrated lime, and fly ash, were selected and compared. It is indicated that the red mud increased the stiffness and elastic behavior of the corresponding asphalt mastic [24]. Zhang and Li et al studied the influence of red mud on the properties of asphalt mortars and asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

Multiscale Study on the Modification Mechanism of Red Mud Modified Asphalt

Wei

Bao

et al. 2020

Advances in Materials Science and Engineering

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Red mud, a waste residue of aluminium industry, was used as modified asphalt material to prepare red mud modified asphalt and red mud modified asphalt under freeze-thaw cycles. The matrix asphalt (MA), red mud modified asphalt (RMMA), and red mud modified asphalt under freeze-thaw cycles (RMMAFC) were studied by scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FTIR), atomic force microscopy (AFM), and differential scanning calorimetry (DSC). Microscopic experiments were conducted to investigate the modification performance and mechanism. The modification mechanism of red mud modified asphalt was investigated using molecular dynamics simulation in this study. The results show that red mud can form a uniform and stable blending system with base asphalt after adding base asphalt. The structure of asphalt after adding red mud and adding red mud and freezing-thawing cycles does not change. The bee-structure decreases obviously with the addition of red mud by atomic force microscopy (AFM). Density decreases gradually, but bee-structure height increases obviously; bee-structure of red mud modified asphalt is destroyed after freeze-thaw cycles. Through differential scanning calorimetry (DSC), after adding red mud, heat absorption decreases. Freeze-thaw cycles greatly reduce heat absorption of red mud modified asphalt. Constructing molecular model of major components of red mud (Fe2O3, Al2O3) and asphaltene, simulation results show that the interfacial energy between asphaltene and red mud’s main components Fe2O3 and Al2O3 at −10°C, 25°C, and 170°C is stronger than that of Fe2O3. The results of calculating the interfacial energy of asphaltene on the chemical composition surface of red mud are negative. It can be seen that there are adsorption effects on the surface of asphaltene and red mud. Therefore, increasing the content of Al2O3 or decreasing the content of Fe2O3 in red mud is beneficial to the adsorption of asphaltene.

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“…Moisture damage is considered one of the most important factors affecting asphalt mixture durability [ 10 , 11 , 12 , 13 ]. Water is closely related to the moisture damage of asphalt pavement during its service phase, and the different aqueous solute compositions of water, such as in areas of acid rain, seaboards, or saline and alkaline land, may cause different moisture damage effects on an asphalt binder [ 14 , 15 ]. In salty and humid environments, the strength of asphalt mixture deteriorates easily because of moisture damage from water infiltration and salt chemical corrosion [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Solute Exposure on the Chemical Evolution and Rheological Properties of Asphalt

Pang

Zhang

et al. 2018

Materials

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The properties of asphalt pavement are damaged under the effects of moisture. The pH value and salt concentration of water are the key factors that affect the chemical and rheological properties of asphalt during moisture damage. Four kinds of water solutions, including distilled water, an acidic solution, alkaline solution and saline solution were used to investigate the effects of aqueous solute compositions on the chemical and rheological properties of asphalt. Thin-layer chromatography with flame ionization detection (TLC-FID), Fourier transform infrared (FTIR) spectroscopy and dynamic shear rheometer (DSR) were applied to investigate the components, chemistry and rheology characteristics of asphalt specimens before and after water solute exposure. The experimental results show that moisture damage of asphalt is not only associated with an oxidation process between asphalt with oxygen, but it is also highly dependent on some compounds of asphalt dissolving and being removed in the water solutions. In detail, after immersion in water solute, the fraction of saturates, aromatics and resins in asphalt binders decreased, while asphaltenes increased; an increase in the carbonyl and sulphoxide indices, and a decrease in the butadiene index were also found from the FTIR analyzer test. The rheological properties of asphalt are sensitive to water solute immersing. The addition of aqueous solutes causes more serious moisture damage on asphalt binders, with the pH11 solution presenting as the most destructive during water solute exposure.

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Influence of freeze–thaw cycles on properties of asphalt-modified epoxy repair materials

Cited by 38 publications

References 24 publications

Thermal, mechanical properties, and low‐temperature performance of fibrous nanoclay‐reinforced epoxy asphalt composites and their concretes

Thermal, mechanical properties, and low‐temperature performance of fibrous nanoclay‐reinforced epoxy asphalt composites and their concretes

Multiscale Study on the Modification Mechanism of Red Mud Modified Asphalt

Influence of Water Solute Exposure on the Chemical Evolution and Rheological Properties of Asphalt

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