Article
Engineering, Geological
Joao Manso, Joao Marcelino, Laura Caldeira
Summary: This study presents a fundamental exploration of the impact of relative humidity on the crushing strength of rockfill particles. Results show that relative humidity significantly influences the strength of rockfill particles, with particle size and humidity conditions being the most important factors affecting crushing strength.
Article
Chemistry, Multidisciplinary
Pengfei Liang, Yu Yang, Jiashun Liu, Changhao Xin, Yidan Sun
Summary: The deformation characteristics of crushed gangue under different water content conditions were studied through confined compaction tests. The strain-stress relationship and crushing law of gangue particles were obtained, and the effects of axial stress, water content, and relative crushing rate on compaction deformation were analyzed. The results showed that the compaction deformation process can be divided into three stages, and the strain-stress relationship can be described by logarithmic and Chapman-Richards functions. The compression modulus varied with water content, and there was a correlation between particle crushing and compaction deformation. The relative crushing rate increased with axial strain and the rate of increase also gradually increased.
APPLIED SCIENCES-BASEL
(2023)
Article
Multidisciplinary Sciences
Alladjo Rimbarngaye, John N. Mwero, Erick K. Ronoh
Summary: This study aims to evaluate the effects of gum Arabic on the maximum dry density and optimum moisture content of laterite soil, and to recommend it as a stabilizer for laterite soil blocks.
Article
Engineering, Environmental
Xue Li, Jiankun Liu
Summary: This research investigates the particle breakage of porous and angular calcareous sand under high-stress levels, with findings that fine-grained soil (FS) can relieve particle breakage and the combination of pressure and relative compaction has a complex effect on the relative crushability ratio.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)
Article
Engineering, Geological
Alexia Cindy Wagner, Joao Vitor de Azambuja Carvalho, Joao Paulo Sousa Silva, Hugo Carlos Scheuermann Filho, Nilo Cesar Consoli
Summary: The disposal of iron ore tailings in dry stacks is becoming more common in Brazil. This study investigates the breakage behavior of the tailings under different laboratory tests simulating compaction and vibration loading. The results show that the tailings only experience particle breakage under extremely high pressures, while the frequency of load and number of cycles are not significant factors in particle breakage under normal field pressures.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Dazhao Gou, Yaoyu Li, Xizhong An, Runyu Yang
Summary: This study conducted a numerical investigation using the discrete element method (DEM) to examine the impact of particle fragmentation on compaction dynamics and the properties of formed compacts. An improved fragmentation model was implemented to simulate particle breakage, which was validated by comparing with literature data. The analysis revealed that the energy consumed by particle fragmentation was a small proportion of the total input energy, with the majority of energy being used to overcome particle friction.
Review
Construction & Building Technology
Nithin Jacob John, Imdadullah Khan, Srikanth Kandalai, Anjan Patel
Summary: This paper conducted an extensive review of literature on particle breeakage and crushing by filtering out 183 articles from various domains. Based on data analysis and synthesis, grain morphology and soil matrix structure were found to be the dominant factors influencing particle breakage. The breakage index can vary with degree of saturation, relative density, confining pressure, and mode of loading. The study also revealed the importance of considering shifting of gradation curve and the need for further research on non-traditional granular material. It is recommended to develop models and supplement laboratory test results with numerical studies that consider multiple influencing parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Chemical
Yang Yang, Yinghui Tian, Chunhui Zhang, Le Wang, Mi Zhou, Junbiao He
Summary: This paper proposes an approach to predict particle breakage and gradation evolution for carbonate sands using compression tests. Two key concepts, 'Breakage ratio' and 'Evolution Distribution Matrix', are developed to answer important questions about particle breakage and the proportion of new particles. Experimental results validate the feasibility and effectiveness of the proposed approach.
Article
Engineering, Chemical
Xiaoxing Liu, Yongchang Wang, Zengxu Zhang, Yin Yu
Summary: The study aimed to determine the applicability of four particle breakage criteria through DEM simulations on spherical aggregates. The results showed that the parameters evaluated cannot accurately predict particle crushing under arbitrary loading configurations, and the maximal contact force at crushing is related to the number and spatial arrangement of loading contacts. The influence of microstructural heterogeneity on breakage strength and the applicability of MCF criterion were also discussed.
Article
Energy & Fuels
Minggao Yu, Mingqiu Wu, Xinlei Yang, Rongyang Lou, Fengchuan Wang, Haitao Li, Liang Wang
Summary: Investigating the breakage properties of coal-rock mass in goaf is important for controlling stratum movement, backfilling solid waste, and preventing thermal-dynamic disasters. In this study, a self-developed experimental system was used to examine the compaction behaviors and breakage characteristics of loose coal samples under different temperatures and stresses. The results showed that the particle gradation became more reasonable over time. The particle breakage rate initially increased slowly with increasing temperature and later accelerated, while it showed the opposite trend with increasing stress load at a given temperature. Stress was found to play a dominant role in coal particle breakage, and the increase in coal temperature enhanced the stress-dominated breakage to some extent. It was also observed that the breakage degree of coal particles was greater under stress-thermal synergy conditions compared to pure stress conditions. The Weibull distribution was suitable for describing the breakage features of crushed particles in the initial stage, while the fractal distribution was applicable for the later stage. Using scanning electron microscopy (SEM), the mechanism of coal particle breakage induced by thermal stress was analyzed, revealing that the size of cracks on coal particle surface increased with temperature while the number of cracks decreased. The superimposition effect of confinement stress and thermal stress primarily influenced the stress distribution of crushed coal particles.
Article
Construction & Building Technology
Saif Alzabeebee, Safaa A. Mohamad, Rwayda Kh S. Al-Hamd
Summary: This study evaluates the applicability of using a data-driven method to predict important properties of coarse-grained soils, showing that the new models provide enhanced accuracy and more optimized and robust design calculations. Additionally, the new models outperform empirical models proposed by different researchers in terms of mean absolute error, root mean square error, a20-index, and coefficient of correlation.
ROAD MATERIALS AND PAVEMENT DESIGN
(2022)
Article
Chemistry, Physical
Shijia Jiang, Hao Yu, Liantong Mo
Summary: The crushing characteristics of coarse aggregates for asphalt concrete were investigated under static and dynamic tests. The type of aggregate strongly influenced the crushing resistance, regardless of the type of load. Proper compaction using Marshall hammer, gyratory compactor, and steel roller can effectively evaluate the crushing susceptibility of coarse aggregates. The aggregate crushing mechanism is controlled by fracture mode, with attrition and abrasion modes contributing relatively less.
Article
Mathematics, Interdisciplinary Applications
Zhaocheng Li, Baowen Liu, Dongdong Han, Yichang Xie, Yongli Zhao
Summary: The relationship between microcracks of a single particle and crushing strength was investigated through virtual experiments. CT-scanning technology was used to obtain the three-dimensional profile of a single particle. The particle bonding model was employed to construct virtual particles based on the three-dimensional contour, and virtual crushing experiments were conducted using the discrete element method. The influence of microcracks on the Weibull distribution of crushing strength was considered in terms of quantity, location, and direction.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Engineering, Ocean
Xin-Zhi Wang, Xing Wang, Jian-Hua Shen, Hao-Zhen Ding, Dong-Sheng Wen, Chang-Qi Zhu, Shi-Zhan Lv
Summary: This study introduces the suitability of atoll reef flats in the South China Sea for land reclamation and engineering construction. It explores the selection of reclamation sites and the characteristics of calcareous soil, including compaction and particle breakage. Based on test results, an effective method of impact rolling + water spray for coarse-grained calcareous soil is proposed, improving foundation compaction efficiency significantly.
APPLIED OCEAN RESEARCH
(2022)
Article
Engineering, Geological
Yang Yang, Chunhui Zhang, Rong Wang, Mingjing Jiang, Yinghui Tian
Summary: This study examines the engineering properties of transitional soils mixed with terrestrial silicate and marine carbonate deposits. The research found that soil deformation is caused by inter-particle rearrangement and particle breakage. The test results show that particle breakage tends to play a dominant role on the deformation with increasing content of carbonate sand and load level.
ENGINEERING GEOLOGY
(2021)
