Improvement of Asphalt-Aggregate Adhesion Using Plant Ash Byproduct

Liu, Zhuangzhuang; Huang, Xiaonan; Sha, Aimin; Wang, Hao; Chen, Jiaqi; Li, Cheng

doi:10.3390/ma12040605

Cited by 29 publications

(14 citation statements)

References 30 publications

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“…It is clear that the typical layer structure for the sandstone [81] can be observed in Figure 13a. The W-OH and sandstone can be clearly separated by the surface morphology difference, which has also been adopted in reference [82]. The area covered by the remained W-OH increases with the W-OH concentration can be found for the remolded sandstone aggregate shown in Figure 13b,c.…”

Section: Constitutive Analysis For the Remolded Pisha Sandstone Compomentioning

confidence: 84%

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Zhao

Guo

et al. 2020

Materials

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Currently the investigation on recycled cement concrete aggregate has been widely conducted, while the understanding of the recycled polymer concrete aggregate is still limited. This study aims to fill this knowledge gap through the experimental investigation on mechanical and durability performance. Specifically, the remolded polyurethane stabilized Pisha sandstone was collected as the recycled polymer concrete aggregate. The remolded Pisha sandstone was then applied to re-prepare the polyurethane-based composites. After that, the mechanical performance of the prepared composites was first examined with unconfined and triaxial compressive tests. The results indicated that the Pisha sandstone reduces the composite’s compressive strength. The reduction is caused by the remained polyurethane material on the surface of the remolded aggregate, which reduces its bond strength with the new polyurethane material. Aiming at this issue, this study applied the ethylene-vinyl acetate (EVA) to enhance the bond performance between the polyurethane and remolded sandstone. The test results indicated both the unconfined and triaxle compressive strength of the polyurethane composites were enhanced with the added EVA content. Furthermore, the durability performance of the EVA-modified composites were examined through freeze-thaw and wet-dry cycle tests. The test results indicated the EVA could enhance the polyurethane composites’ resistance to both wet-dry and freeze-thaw cycles. Overall, the modification with EVA can compensate for the strength loss of polyurethane composites because of the applied remolded aggregate and enhance its sustainability.

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Section: Constitutive Analysis For the Remolded Pisha Sandstone Compomentioning

confidence: 84%

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Zhao

Guo

et al. 2020

Materials

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“…Polymers such as poly(styrene-butadiene-styrene), (SBS) also improve rheological properties but they do so physically by imparting their own properties into the matrix thus improving its properties [ 10 , 11 ]. Adhesion promoters such as amides and hydrated lime either chemically interact with bitumen to reduce the surface free energy of the constituents of the asphalt conglomerate or increase water resistance of asphalt by preventing water molecules from getting into the bituminous matrix [ 12 , 13 ]. Rejuvenating agents are used to recycle the old road pavements (reclaimed asphalt pavement otherwise known as RAP) due to their ability to interact with aged bitumen aggregates to regenerate the original unaged bitumen structure [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Spicy Bitumen: Curcumin Effects on the Rheological and Adhesion Properties of Asphalt

et al. 2021

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Over the years, the need for the synthesis of biodegradable materials has facilitated the drift of the asphalt industry towards eco-sustainable and cost-effective production of road pavements. The principal additives in the asphalt industry to improve the performance of road pavements and increase its lifespan are majorly rheological modifiers, adhesion promoters and anti-oxidant agents. Rheological modifiers increase physico-chemical properties such as transition temperature of asphalt binder (bitumen), adhesion promoters increase the affinity between binder and stone aggregates while anti-oxidant agents reduce the effects of oxidation caused by exposure to air, water and other natural elements during the production of asphalt pavements. In this study, we tested the effectiveness of a food grade bio-additive on these three aforementioned properties. We also sought to hypothesize the mechanisms by which the additive confers these desired features on bitumen. We present this study to evaluate the effects of turmeric, a food-based additive, on bitumen. The study was conducted through dynamic shear rheology (DSR), atomic force microscopy, scanning electron microscopy (SEM) and boiling test analysis.

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“…During the long-term service period, asphalt mixtures are extremely prone to damage due to environmental factors and vehicle loads [ 1 , 2 , 3 ]. Previous studies have proven that the asphalt–aggregate interface is the most fragile position in asphalt mixtures, which has a significant influence on the overall performance of asphalt mixtures [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamic Investigations on the Adhesion Behaviors of Asphalt Mastic–Aggregate Interface

Qiu

Xiao

et al. 2020

Materials

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The asphalt mastic–aggregate interface plays an essential role in determining the service performance of asphalt mixtures. The objective of this paper was to investigate the adhesion behaviors and mechanism between asphalt mastic and aggregate based on molecular dynamic (MD) simulations. First, the asphalt mastic model considering the actual mass ratio of filler to asphalt (F/A) condition was established and validated in terms of thermodynamic properties. Second, the molecular arrangement characteristics of polar components on the aggregate substrate were analyzed by radial distribution function (RDF), relative concentration (RC), and mean square displacement (MSD). Third, the interfacial adhesion ability between asphalt and aggregate was quantitively evaluated based on the work of adhesion. Finally, the coupling effect of moisture and temperature on interfacial adhesion behaviors was investigated to explore the adhesion failure characteristics of the asphalt–aggregate interface. The results demonstrate that the thermodynamic properties could be employed to validate the reliability of the asphalt mastic model. The self-aggregation degree of polar components in base asphalt could be significantly increased with the addition of silica particles, exhibiting a change of configuration from “parallel arrangement” into “stack distribution” due to the high polarity of silica particles. The polar components in asphalt mastic exhibit a more uniform distribution state and lower mobility capability than base asphalt owing to the adsorption effect of silica particles. Silica particles with amounts of residual charges could significantly increase the electrostatic energy of the asphalt mastic–aggregate interface, contributing to an improvement of the adhesion between asphalt mastic and aggregate. The increase of temperature enhances the work of adhesion of the asphalt mastic–aggregate interface, which is opposite to that of the base asphalt–aggregate interface. The asphalt mastic exhibits a greater sensitivity to interfacial moisture damage than base asphalt. The findings would provide insights into a better understanding on the micro adhesion mechanism of the asphalt mastic–aggregate interface.

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Improvement of Asphalt-Aggregate Adhesion Using Plant Ash Byproduct

Cited by 29 publications

References 30 publications

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Performance Evaluation of the Polyurethane-Based Composites Prepared with Recycled Polymer Concrete Aggregate

Spicy Bitumen: Curcumin Effects on the Rheological and Adhesion Properties of Asphalt

Molecular Dynamic Investigations on the Adhesion Behaviors of Asphalt Mastic–Aggregate Interface

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