Investigation on segregation characteristics of thermosetting epoxy asphalt mixture during the compaction

Liu, Yang; Qian, Zhendong; Yang, Yuming; Gong, Minghui; Huang, Qibo; Zhang, Xiangfei

doi:10.1016/j.conbuildmat.2021.126256

Cited by 15 publications

(3 citation statements)

References 30 publications

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“…The tangential stiffness multiplier is defined as the proportion between tangential and normal stiffness, whose calculation is detailed in the research by Dan et al [ 33 ]. The values in Table 4 are based on previous studies [ 21 , 31 ] and obtained through inverse calculations between experiments and simulations.…”

Section: Discrete Element Simulationmentioning

confidence: 99%

“…Khateeb et al [ 20 ] used the DEM to model the compaction of porous asphalt mixtures, aiding in understanding the mesostructural changes in the mixture during compaction. Liu et al [ 21 ] established a discrete element compaction model for steel bridge decks to investigate the segregation characteristics of the mixture during compaction. Man et al [ 22 ] proposed a dual-scale discrete element model for simulating the compaction process of a hot asphalt mixture and successfully captured the influence of particle size distribution on the compaction behavior.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Particle Rotation Characteristics and Compaction Quality Control of Asphalt Pavement Using the Discrete Element Method

Zhang,

Dan,

Shan

et al. 2024

Materials

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The compaction of asphalt pavement is a crucial step to ensure its service life. Although intelligent compaction technology can monitor compaction quality in real time, its application to individual asphalt surface courses still faces limitations. Therefore, it is necessary to study the compaction mechanism of asphalt pavements from the particle level to optimize intelligent compaction technology. This study constructed an asphalt pavement compaction model using the Discrete Element Method (DEM). First, the changes in pavement smoothness during the compaction process were analyzed. Second, the changes in the angular velocity of the mixture and the triaxial angular velocity (TAV) of the mortar, aggregates, and mixture during vibratory compaction were examined. Finally, the correlations between the TAV amplitude and the coordination number (CN) amplitude with the compaction degree of the mixture were investigated. This study found that vibratory compaction can significantly reduce asymmetric wave deformation, improving pavement smoothness. The mixture primarily rotates in the vertical plane during the first six passes of vibratory compaction and within the horizontal plane during the seventh pass. Additionally, TAV reveals the three-dimensional dynamic rotation characteristics of the particles, and the linear relationship between its amplitude and the pavement compaction degree aids in controlling the compaction quality of asphalt pavements. Finally, the linear relationship between CN amplitude and pavement compaction degree can predict the stability of the aggregate structure. This study significantly enhances quality control in pavement compaction and advances intelligent compaction technology development.

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Section: Discrete Element Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of Particle Rotation Characteristics and Compaction Quality Control of Asphalt Pavement Using the Discrete Element Method

Zhang,

Dan,

Shan

et al. 2024

Materials

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“…Under natural conditions, freeze‐thaw cycles, and wetting‐drying cycles can promote the recovery of compacted soils (Liu et al, 2021; Rajaram & Erbach, 1999). Freeze‐thaw cycles can change the soil structure, leading to frost heave and thawing of the soil (Liu, Huang et al, 2023; Ma et al, 2021). The wetting and drying cycles create more soil porosity, which in turn improves the soil structure (Ding et al, 2024).…”

Section: Mitigation and Prevention Strategies For Soil Compactionmentioning

confidence: 99%

Soil compaction due to agricultural machinery impact: A systematic review

Zhang,

Jia,

Fan

et al. 2024

Land Degrad Dev

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Soil compaction is generally viewed as one of the most serious soil degradation problems and a determining factor in crop productivity worldwide. It is imperative to understand the processes involved in soil compaction to meet the future global challenges of food security. In this work, we used co‐occurring keyword analysis to summarize 3491 papers on soil compaction over the past 40 years, elaborating on the main research focuses such as the causes, influencing factors, and effects of soil compaction on crops, and the mitigation and prevention of soil compaction. This review provides a comprehensive discussion of the effects of soil compaction, including altering soil structure, increasing bulk density (BD) and penetration resistance (PR), and reducing porosity and soil hydraulic properties. Notably, based on the 387 data points of 11 papers about BD, our results demonstrated soil compaction on average, increased BD by 7.6%, 6.9%, and 3.2% in the medium‐, coarse‐, and fine‐textured soils, respectively. Based on the 264 data points of 18 papers, in the 0–30 cm soil layer, compaction increased penetration resistance (by 91% in the coarse‐textured, 84.2% in the medium‐textured, and 8.8% in the fine‐textured soils). Compacted soil limits the access of crop roots to water and nutrients, leading to poor root development and reduced crop productivity. There was a difference in soil compaction sensitivity between the different crops, but crop growth and yield showed an overall worsening trend with increasing degrees of compaction. This review collected data points on 142 crop yields and found that wheat, barley, corn, and soybean yields decreased by an average of 4.1%, 15.1%, 37.7%, and 22.7%, respectively, in the BD range of 1.1–1.8 Mg/cm3 after compaction. Additionally, the effectiveness of different compaction mitigation measures, including natural, tillage, and biological, is systematically discussed. Compared with soil compaction mitigation measures, prevention should be the top priority although there is still a lack of practical prevention methods. Soil conditions and agricultural machinery type are the main factors affecting the risk of soil compaction in the process of soil compaction. Therefore, it is particularly important to optimize the soil working conditions in the field and the type of farm machinery used to reduce the risk of soil compaction. This initiative is pivotal for ensuring sustainable systems for food production and recovering crop productivity from compacted soil.

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