Analysis of interface interaction of aggregate-asphalt system and its effect on shear-slip behavior of asphalt mixture

Su, Jinfei; Li, Peilong; Wei, Xin; Sun, Shengfei; Zhu, Lei; Dong, Chao

doi:10.1016/j.conbuildmat.2020.120680

Cited by 21 publications

(4 citation statements)

References 15 publications

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“…In 1974, Heinz Thumer of Sweden proposed ICMV for the first time and tested it on Dynapac smooth wheel vibratory roller and granular soil [12][13][14]. In 1976, Swedish geodynamic company and Dynapac jointly developed the compaction measurement index based on CMV method [15,16].…”

Section: Icmv and Geostatistical Modelmentioning

confidence: 99%

Study on the Compaction Performance and Its Key Influencing Factors of Asphalt Mixture Based on Intelligent Sensing Techniques

Wang

2023

Journal of Sensors

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Real-time and accurate compaction quality monitoring is one of the key steps in the pavement construction. In this study, the effect of roller passes and temperature on the compactness of asphalt mixtures and its uniformity is discussed using the semivariance function. Further, the indoor asphalt mixture gyratory compaction test was carried out based on the embedded SmartRock sensor, with the aim of monitoring the changes in rotation and contact forces between aggregates. In addition, the effect of temperature on the dynamic response of SmartRock is discussed, and the compaction mechanism of asphalt mixtures is investigated from a microscopic scale. It is found that compaction degree and uniformity are not always positively correlated with the number of roller passes and that excessive compaction leads to a decrease in compaction effect; meanwhile, the variation in the compactness of asphalt mixtures can be characterized by the dynamic response of SmartRock, which providing a feasible method for real-time monitoring of the compaction process and optimization of the construction plan.

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Section: Icmv and Geostatistical Modelmentioning

confidence: 99%

Study on the Compaction Performance and Its Key Influencing Factors of Asphalt Mixture Based on Intelligent Sensing Techniques

Wang

2023

Journal of Sensors

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“…The percentage of air voids in the asphalt mixture decreases with the increase in the amount of coarse aggregate grading, and the asphalt mixture which uses intermittent grading is favourable to increase the compaction of the mixture [22]. Higher asphalt content or higher compaction temperatures lead to a reduction in the contact strength of the asphalt mixture, which improves its work ability [23]. During compaction, the friction-lubrication effects between aggregate particles have a significant influence on the compaction characteristics and compaction effect; for example, sufficiently lubricated dense-graded asphalt mixtures are easily compacted [24].…”

Section: Introductionmentioning

confidence: 99%

The Friction–Lubrication Effect and Compaction Characteristics of an SMA Asphalt Mixture under Variable Temperature Conditions

Wu,

Tang,

Liu

et al. 2024

Materials

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The aim of this article is to explore the dynamic compaction characteristics of stone mastic asphalt (SMA) and the friction–lubrication effect of internal particles during the superpave gyratory compaction (SGC) process. Firstly, a calculated method for the compaction degree of an asphalt mixture in the gyratory compaction process was defined based on the multiphase granular volume method. Secondly, the gyratory compaction curves of asphalt mixtures were taken based on this calculation method of compaction degree. The dynamic change law of each compaction index (compaction, percentage of air voids, compaction energy index, etc.) during the compaction process was analysed. Finally, the effects of different initial compaction temperatures and different asphalt content on the friction–lubrication effect and compaction characteristics of asphalt mixtures were studied. Research shows that it is reasonable to define the compaction degree by the ratio of the apparent density of the asphalt mixture to the maximum theoretical density of the asphalt mixture during gyratory compaction. The dynamic prediction equations of the compaction degree K and the compaction energy index CEI with the amount of compaction were established, and could effectively predict the compaction degree, percentage of air voids and compaction energy index CEI. The compaction process of the asphalt mixture needed to go through three phases, including periods of rapid growth, slow growth, and stabilisation, and the compaction degree increased by about 10%, 5%, and 1%, in that order, finally tending towards a stable value. The effect of the initial compaction temperature on the forming compaction degree of the asphalt mixture is significant; therefore, it should be controlled strictly in the compaction construction of asphalt mixtures. When the initial compaction temperature of SMA-13 is about 170 °C, the compaction effect is optimal, and the effect of the increase in the amount of compaction at a later stage on the increase in the compaction degree of the asphalt mixture is very low. With the optimal asphalt content, the friction–lubrication effect between the asphalt and aggregate particles is optimal, because it can effectively form an asphalt film, reducing the frictional resistance of the particles moving each other during the compaction process, and the voids will be embedded and filled with each other, finally producing the best compaction result.

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“…With aging of the asphalt-binder, the chemical composition and physical properties of the asphalt-binder will change, ultimately affecting the adhesion of the asphalt-binder-aggregate interface and mechanical properties of the asphalt mixture [ 6 ]. That is, the adhesive strength of the interfacial bonding between the asphalt-binder and aggregate largely determines the overall stability of the asphalt mixture.…”

Section: Introductionmentioning

confidence: 99%

“…Su et al [ 6 ] adopted two self-developed testers, namely the aggregate contact-shear and interface shear-slip testers, to measure the parameters of the particle contact and interface shear-slip for mesoscopic level analysis. The results showed that the interfacial interaction is mainly caused by the coupling effect of the particle contact and the asphalt-binder bonding lubrication.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of the Interfacial Bond between Asphalt-Binder and Aggregates under Different Aging Conditions

et al. 2021

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Aging has a detrimental impact on the interfacial interaction and bonding between asphalt-binder and aggregates, which influence ultimately on the performance of asphalt mixtures and pavements. Evaluation of the mechanical properties of the interface between the asphalt-binder and aggregates has thus become a hot research topic, particularly as a function of aging. In this study, the interfacial tensile strength, compressive strength, elastic modulus, and interfacial recovery energy were measured and quantified using molecular dynamic simulation. Whilst the free volume of the asphalt mixtures exhibited sensitivity to aging, the interfacial tensile strength decreased with an increase in the degree of aging. In general, the mechanical properties of the asphalt-binder-aggregate interface were found to be significantly dependent on the aggregate type. Furthermore, the study results indicated that interfacial recovery energy is a key characteristic property for characterizing the interfacial adhesive force within asphalt mixtures. Overall, the study of mechanical properties of the asphalt-binder and aggregate interface, as presented in this paper, contributes to quantifying the adhesive properties and improving the performance of asphalt mixtures.

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Analysis of interface interaction of aggregate-asphalt system and its effect on shear-slip behavior of asphalt mixture

Cited by 21 publications

References 15 publications

Study on the Compaction Performance and Its Key Influencing Factors of Asphalt Mixture Based on Intelligent Sensing Techniques

Study on the Compaction Performance and Its Key Influencing Factors of Asphalt Mixture Based on Intelligent Sensing Techniques

The Friction–Lubrication Effect and Compaction Characteristics of an SMA Asphalt Mixture under Variable Temperature Conditions

Mechanical Properties of the Interfacial Bond between Asphalt-Binder and Aggregates under Different Aging Conditions

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