Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test

Sheng, Yanping; Jia, Haichuan; Chen, Huaxin; Zhao, Xinze; Wang, Runzhi

doi:10.1155/2020/6621275

Cited by 8 publications

(3 citation statements)

References 35 publications

(35 reference statements)

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“…To establish a mesoscopic mechanical model, it is necessary to construct a suitable RVE, i.e., a microstructural model. Mesoscopic mechanics is a two-scale mechanical structure including both the macroscopic scale and the mesoscopic scale [6]. At the macroscopic scale, the continuum consists of many material points, and the mesoscopic space associated with the macroscopic point is called the representative volume element (RVE), which is a fundamental concept in mesoscopic mechanics, and needs to satisfy the duality of scales.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation into the Mechanical Behavior of Composite Solid Propellants Subject to Uniaxial Tension

Wu,

Jiang,

et al. 2023

Materials

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To further explore the quasi-static mechanical characteristics of composite solid propellants at low strain rates, an investigation was conducted on the mechanical behavior and damage mechanisms of a four-component hydroxy-terminated polybutadiene (HTPB) propellant by means of experiments and numerical simulation. A uniaxial tensile test and scanning electron microscope (SEM) characterization experiment were carried out. A microstructural model, which accurately represents the mesoscopic structure, was developed via the integration of micro-CT scanning and image-processing techniques. The constructed microstructural model was utilized to conduct a numerical simulation of the mechanical behavior. The experimental results demonstrated that the maximum tensile strength increases with increasing strain rate, and the primary cause of propellant failure at low strain rates is the dewetting phenomenon occurring at the interface between the larger particles and the matrix. The maximum tensile strength is 0.48 MPa when the strain rate is 0.00119 s−1, and the maximum tensile strength is 0.37 MPa when the strain rate is 0.000119 s−1. The simulation results indicated a consistent trend in variation when comparing the simulation and experimental curves. This suggested that the established model exhibits a high level of reliability, and provides a promising approach for carrying out microstructural simulations of heterogeneous propellants in future. The mechanical behavior of the propellant can be effectively described by utilizing a mesoscopic finite element model that incorporates the superelastic constitutive model of the matrix and the bilinear cohesive model. This framework facilitates the representation of mesoscopic damage evolution, which consequently provides insights into the damage mechanism. Additionally, the utilization of such models assists in compensating for the limitations of damage evolution characterization experiments.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation into the Mechanical Behavior of Composite Solid Propellants Subject to Uniaxial Tension

Wu,

Jiang,

et al. 2023

Materials

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“…For instance, asphalt pavement recycling technology uses a specific process to recycle old asphalt pavement materials to obtain a high performance asphalt mixture [ 6 , 7 , 8 , 9 ]. Thereby, the technology can realize the reuse of old pavement materials to achieve waste utilization, as well as reduce production costs [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Research Hotspots and Development Trends on Recycled Construction Materials in Pavement Engineering: A Bibliometric Evaluation

et al. 2021

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Road recycling technology is gradually becoming a research focus in road construction due to natural resource shortages. It is therefore necessary to carry out deep and extensive analysis of the huge amount of publications in the research area of recycling technology in road construction. Based on three databases (Web of Science, Compendex and Scopus) and VOSviewer visualization software, this study conducts a bibliometric analysis of the literature in the field of recycled construction materials in pavement engineering. The global research publications were reviewed to quantitatively identify the literature characteristics. A number of publications, document types, research areas and keywords were used to achieve the general statistics of this reviewed literature. H-index, publication number and citations per publication were used to evaluate the academic contributions by country, institution and journal. The results show that the most productive country and institution for publications are the USA and Chang’an University from China, respectively, followed by China and Wuhan University of Technology. In recent years, researchers have generally paid attention to two main approaches: the application of rubber modified asphalt and the performance enhancement of recycled pavement.

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“…However, as the influence of load, light, precipitation, and climate changes, its durability decreases, and its service life dropped to less than ten years. Moreover, the current service level of the ultrathin wear course during the service period is low, such as poor flatness, fast antiskid attenuation, and loud driving noise, which not only reduces driving comfort but also increases noise pollution and traffic safety [7][8][9][10][11]. erefore, it should not only meet the structural performance requirements but also have sufficient flatness, antiskid performance, wear resistance, low noise, and other functional properties.…”

Section: Introductionmentioning

confidence: 99%

Study on the Performance and Adhesion Behavior of Ultrathin Wearing Course Using Calcined Bauxite as Aggregate

Sheng

Wang

Jia

et al. 2021

Mathematical Problems in Engineering

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An ultrathin wearing course is an effective maintenance treatment for prolonging the service life of asphalt pavements, which have been widely used in the field of pavement construction and road maintenance. However, the repeated vehicle load and wear results in a decreased durability of ultrathin wear course cover pavement. Hence, the gradation of ultrathin wear course was designed using calcined bauxite in this study, and the water stability, low-temperature properties, resistance to permanent deformation, and salt erosion were investigated through a laboratory test. Results indicated that the addition of a nonammonia antistripping agent significantly improves the water stability of the asphalt mixture with calcined bauxite and its ability to resist salt erosion as well as improve its low-temperature deformation ability. At the same time, polyphosphoric acid improves the adhesion between asphalt and calcined bauxite aggregate and the high-temperature performance of asphalt mixture but has limited improvement in water stability and resistance to salt erosion. This research is conducive to the widespread use of calcined bauxite aggregates in road pavements and is of great significance for improving the durability of ultrathin wear course asphalt pavements.

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Study on Mesoscopic Mechanics of Recycled Asphalt Mixture in the Indirect Tensile Test

Cited by 8 publications

References 35 publications

Experimental and Numerical Investigation into the Mechanical Behavior of Composite Solid Propellants Subject to Uniaxial Tension

Experimental and Numerical Investigation into the Mechanical Behavior of Composite Solid Propellants Subject to Uniaxial Tension

Research Hotspots and Development Trends on Recycled Construction Materials in Pavement Engineering: A Bibliometric Evaluation

Study on the Performance and Adhesion Behavior of Ultrathin Wearing Course Using Calcined Bauxite as Aggregate

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