Evaluation of Nano-ZnO Dispersed State in Bitumen with Digital Imaging Processing Techniques

Li, R.; Dai, Yan; Wang, P.; Sun, Chengjian; Zhang, J.; Pei, Jianzhong

doi:10.1520/jte20160401

Cited by 36 publications

(3 citation statements)

References 3 publications

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“…However, the interfacial bonding strength between nanomaterial and asphalt binder is relatively weak due to their different interfacial properties; interfacial defects form easily between organic and inorganic materials, thus resulting in nanocomposites' performance degradation [11][12][13]. Some factors also increase the difficulties of dispersion and stability on the microscopic scale, such as the high viscosity of asphalt and the agglomeration of nanoparticles (NPs) with high surface energy [14,15]. Previous research found that NPs exist in the form of agglomerates or cause local enrichment or segregation due to the above problems, thus resulting in uneven microstructure of the composite material and distortion of the force field, which not only affects the normal function of the nano effect, but also sometimes plays an opposite role [15,16].…”

Section: Introductionmentioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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To solve the nanoparticles (NPs) agglomeration phenomena of nanometer calcium carbonate (nano-CaCO3) modified asphalt binder, in this paper, solvent-free CaCO3 nanofluids (NFs) were prepared based on surface-functionalized CaCO3 NPs to study the effect on asphalt. Microscopic structures, compositions, and thermal stability were characterized by Fourier transform infrared spectrometer (FTIR), X-ray diffractometer (XRD), transmission electron microscope (TEM), and thermogravimetric analyzer (TGA), respectively. Results showed that perfect CaCO3 NFs were successfully prepared, and were good enough for asphalt mixing due to their excellent thermal stability. Scanning electron microscopy (SEM), conventional tests, dynamic shear rheometry (DSR), and bending beam rheometry (BBR) were conducted to investigate the modifying effect. The SEM results indicated that CaCO3 NFs had better compatibility with asphalt binder than original CaCO3 NPs. Conventional and DSR test results demonstrated that CaCO3 NFs had slight negative effects on high-temperature performance while improving the low-temperature performance of the asphalt binder. The BBR test results confirmed that the modifier addition effectively enhanced asphalt binders’ low-temperature crack resistance performance.

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Section: Introductionmentioning

confidence: 99%

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Shen

Pei

et al. 2019

Applied Sciences

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“…When the PPA stoichiometry was small, the storage stability of SBS-modified asphalt was improved. When PPA exceeded its optimum content, serious segregation occurs in the composite-modified asphalt [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the High-Temperature and Low-Temperature Performance of Polyphosphoric Acid/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Pei

Shen

et al. 2019

Advances in Materials Science and Engineering

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The high-performance asphalt materials are used to replace the ordinary road asphalt that cannot meet the requirements of natural environment and traffic situation, which is the effective way to solve poor asphalt pavement durability. In this paper, polyphosphoric acid- (PPA-) modified asphalt and polyphosphoric acid (PPA)/styrene-butadiene-styrene (SBS) composite-modified asphalt with different PPA content were prepared by using two-type asphalt. The effect of PPA modifier on asphalt was analyzed by using the creep elastic recovery rate, accumulating strain and creep modulus tests. The results showed that asphalt types and the PPA could significantly improve the elastic recovery rate of asphalt, reduce the cumulative strain and creep stiffness of the viscosity part, improve the high-temperature performance, and reduce the permanent deformation of the asphalt under repeated load. The high-temperature performance and low-temperature performance of PPA-modified asphalt were studied by the chemical and physical modification techniques. The advantages of modified asphalt are well developed while reducing the price of it, which has important technical and economic significance.

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“…Although asphalt binder has inherent self-healing ability, the ability was limited under the action of continuous traffic loading, moisture ingress and other factors. Thus, continuous development of cracks will lead to bitumen pavement failure [5,6,7,8,9]. It is urgent to improve the self-healing of asphalt to extend the service life and reduce maintenance cost of asphalt pavement.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture

Shu

Bao

et al. 2019

Materials

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The idea of prolonging the service life of asphalt mixture by improving the self-healing ability of asphalt has received extensive attention in recent years. In view of this, this work synthesized three kinds of encapsulating rejuvenator fibers to improve self-healing properties of asphalt mixtures. A series of characterizations were performed to study the morphology, chemical structure and thermal stability of the three kinds of fibers. Subsequently, the road performance of asphalt mixture containing the fiber were investigated, which included high and low temperature, water sensitivity and fatigue performances. Finally, the self-healing performance of asphalt mixture containing the fiber was investigated by 3PB test. The results revealed that the three kinds of encapsulating rejuvenator fibers were successfully synthesized. The fibers had excellent thermal stability, which met temperature requirements in the mixing and compaction process of asphalt mixtures. Road performance of asphalt mixture containing the fiber met the requirements. Self-healing ability of asphalt mixture containing the fiber was improved. Synergistic action of temperature and rejuvenator could further significantly improve the self-healing ability of the asphalt mixture.

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Evaluation of Nano-ZnO Dispersed State in Bitumen with Digital Imaging Processing Techniques

Cited by 36 publications

References 3 publications

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Preparation and the Effect of Surface-Functionalized Calcium Carbonate Nanoparticles on Asphalt Binder

Experimental Study on the High-Temperature and Low-Temperature Performance of Polyphosphoric Acid/Styrene-Butadiene-Styrene Composite-Modified Asphalt

Synthesis and Effect of Encapsulating Rejuvenator Fiber on the Performance of Asphalt Mixture

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