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This study aims to investigate the effect of rock types, i.e., granite, conglomerate rock, limestone, and crushing mechanism, i.e., Vertical Shaft Impact (VSI) crusher, Horizontal Shaft Impact ...
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In order to gain insights into the mesoscopic mechanism of creep for calcareous sand, the ultra-depth-of-field microscope (Type Keynes VHX-5000) was utilized to capture images of calcareous sand particles with size of 0.5–1 mm and 2–2.5 mm, as well as silica sand particles with size of 0.5–1 mm during the process of creep and shear.
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Calcareous sediments generally consist of the remains of marine organism,which tend to be crushed relatively easily under load,compared to terrigenous materials. Laboratory tests are carried out on calcareous sand taken from the South China Sea;and it is pointed out that the compression behavior of calcareous sand under one-dimensional compression is …
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Calcareous sand containing weak particles originated from the deposition of skeletal residue of marine organisms is susceptible to significant particle crushing under …
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Learn about the three stages of crushing rocks into smaller pieces for various applications in the aggregates and mining industries. Compare the types, principles, advantages, and disadvantages of …
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This study aims to investigate the effect of rock types, i.e., granite, conglomerate rock, limestone, and crushing mechanism, i.e., Vertical Shaft Impact …
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The construction of some structures with large loads can inevitably lead to the crushing of calcareous sand that can be the main material of foundation. Therefore,it is important to study the compression and the crushing mechanism of calcareous sand under high stress. In this paper,the basic geometric parameters of calcareous particles were ...
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In general, particle shape has an important influence on the breakage behavior of brittle particles (Zhou et al. 2016; Gye-chun and Jake 2006).However, the calcareous sand particles are difficult to process into standard samples with the same geometry because of their low crushing strength, which may introduce extraneous flaws …
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Compared to the 3-D Sd of quartz sand, the calcareous sand's particle morphology is much more irregular and multi-angular, which makes it easy for the calcareous sand to form large pores and ...
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The evolution of macro and meso parameters describing the crushing characteristics of calcareous sand particles, such as porosity, effective porosity, effective coordination number, and sliding contact ratio, is analyzed, and further, the particle crushing mechanism of calcareous sand is studied. 2. Discrete Element Model for …
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effects of rock types and crushing mechanisms on the morphology of manufactured sands were investigated. Three rock types, i.e., granite, conglomerate rock, and limestone, and …
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Study on the crushing mechanism and parameters of the two-flow crusher. March 2022; ... In order to prevent excessi ve sand and dust, current Chinese sand belt conveyors generally run at a low speed.
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The authors' previous work characterized crushing characteristics and morphological properties of Jordan sand with a range from 0.5 to 0.71 mm [13], which was used to calibrated discrete element ...
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This paper presents an investigation of the liquefaction characteristics and particle crushing of isotropically consolidated silica sand specimens at a wide range of confining pressures varying ...
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The manufactured sand is generally obtained by crushing rock usingmechanicalforce,whichcouldcauseproblemsofhighcontent of flaky particles, poor particle shape, and ...
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eect of the limestone sand grain crushing, propose to express the grains crushing degree by a coecient C c which is the ratio een tw be (d 10initial and d10nal). Lade et al. (1996) [11] suggest the use of another crushing indicator called B 10. Hardin (1985) [9] proposed a method to quantify the breakage as a function
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eters describing the crushing characteristics of calcareous sand particles, such as porosity, effective porosity, effective coordination number, and sliding contact ratio, is analyzed, and further, the particle crushing mechanism of calcareous sand is studied. 2. Discrete Element Model for Particle Crushing 2.1.
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Learn everything you need to know about primary crushing, secondary crushing, and tertiary crushing in this comprehensive guide. Discover the types of crushers used in each stage, their working …
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WEBEffects of outer and inner particle morphologies (i.e., particle size, sphericity, angularity and intra-particle void ratio) on the crushing characteristics of single …
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Considering grain crushing, the deformation mechanism for the sand is divided into the relative motion between grains and the breakage of grains themselves. If it is assumed that the volume before particle breakage is equal to the volume of the sand after breakage, the evolution of void ratio can still be calculated based on Eq.
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[15] Hardin B O 1985 Crushing of Soil Particles Journal of Geotechnical Engineering 111 1177-1192. Go to reference in article Google Scholar [16] Chen Q, Gao Y and Yuan Q 2021 Kinetic characterizations and micro-mechanism of dense sand subjected to shear Water Resources and Hydropower Engineering 52 212-224 in Chinese. Go to …
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This article studies the structure and crushing behavior of lightweight expanded clay aggregate (LECA) particles using X-ray tomography and discrete …
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This study introduced an innovative and effective algorithm that aims to provide a comprehensive simulation of particle crushing behavior in complex granular …
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The fine processing technology of sand and gravel aggregate is mainly completed by impact crusher [].As shown in Figure 1(a), the amount of sand and gravel processed by an ordinary impact crusher is less than the two-flow crushing shown in Figure 1(b).More and more enterprises are beginning to pay attention to two-flow …
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To improve the crushing effect and reduce the range of particle size distribution after crushing, the crushing mechanism and the particle size distribution …
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The calcareous sand is a biogenic sediment obtained from the reef reclamation site in Nansha Island, South China Sea. The total area of coral reefs in South China Sea is approximately 3.8*10 4 km 2, occupying 5% of the total amount all around the world.Majority of coral reefs are located within the region of Nansha Island.
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The particle crushing modes and creep mechanisms of calcareous sand are also examined through meso-observations. It is found that the particle crushing modes can be categorized into three distinct types: grinding, angular breakage, and whole particle breakage. The particle gradation not only impacts the primary particle crushing mode …
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The differential sawing type picking and crushing mechanism proposed in this study provides a theoretical basis for the innovative design of silage round bundling machines. ... The behavior of sand crushing will appear when the confining pressure is up to a certain value, which results in disappearing of the positive dilatancy of sand. ...
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@article{Wu2021ExperimentalIO, title={Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea}, author={Yang Wu and Neng Li and Xin-zhi Wang and Jie Cui and Yulong Chen and Yihang Wu and Haruyuki Yamamoto}, journal={Engineering Geology}, year={2021}, url={https://api ...
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Abstract It is commonly accepted that remarkable particle breakage starts at a stress level exceeding the yield point on the compression curve and continuously affects the mechanical behavior of granular materials during compression. A series of one-dimensional compression tests on calcareous sands were performed to investigate the evolution of …
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