scholarly journals CHANGE IN VOID STRUCTURE DUE TO PARTICLE BREAKAGE OF VOLCANIC COARSE-GRAINED SOIL AND ITS EVALUATION

2007 ◽  
Vol 63 (1) ◽  
pp. 224-236 ◽  
Author(s):  
Takafumi NAKATA ◽  
Seiichi MIURA
Keyword(s):  
Particle Breakage ◽  
Coarse Grained ◽  
Void Structure ◽  
Coarse Grained Soil

scholarly journals Particle breakage characteristics of coarse-grained soil under point-point contact

2020 ◽  
Vol 570 ◽  
pp. 032036
Author(s):  
L Li ◽  
C Zhao ◽  
Y W Zhang ◽  
G B Ouyang ◽  
S C Yu ◽  
...  
Keyword(s):  
Point Contact ◽  
Particle Breakage ◽  
Coarse Grained ◽  
Coarse Grained Soil

Study on Particle Breakage of Coarse-Grained Soil Based on Large-Scale Triaxial Test

2014 ◽  
Vol 937 ◽  
pp. 585-589
Author(s):  
Fu Yong Chu
Keyword(s):  
Power Function ◽  
Triaxial Test ◽  
Large Scale ◽  
Confining Pressure ◽  
Particle Breakage ◽  
Plastic Work ◽  
Coarse Grained ◽  
Earth Dam ◽  
Relationship Of ◽  
Coarse Grained Soil

Using large-scale shearing device, isotropiclly consolidated-drained triaxial test under different confining pressures are performed for overburden material of ShuangJiangKou earth dam which relative density is 0.8. The relationship between particle breakage of coarse-grained soil and input plastic work under loading and between particle breakage and confining pressure and between particle breakage and strength of coarse-grained soil. The results show that the particle breakage of coarse-grained soil and the input plastic work under loading is closely related. The particle breakage of coarse-grained soil increase with the input plastic work and there is a relationship of power function between Bg andWp. the increase of confining pressure will lead to the increase of particle breakage of coarse-grained soil, and there is a relationship of power function between Bg and. the increase of particle breakage of coarse-grained soil will lead to the decrease of strength of coarse-grained soil, and a relationship of linear between Bg andφ.

scholarly journals Mechanism of the Breakage of Spherical Gypsum Particles under 3-Point Contact Conditions

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1029
Author(s):  
Yiran Niu ◽  
Lin Li ◽  
Yanwei Zhang ◽  
Shicai Yu
Keyword(s):  
Great Influence ◽  
Point Contact ◽  
Particle Breakage ◽  
Coarse Grained ◽  
Spherical Particles ◽  
Superposition Method ◽  
Contact Conditions ◽  
Contact Points ◽  
Ball Contact ◽  
Coarse Grained Soil

Particle breakage has a great influence on the mechanical properties of coarse-grained soil materials. In the structure, a particle usually contacts with several surrounding particles when breakage occurs. The crushing mechanism of spherical particles under three-point contact conditions was investigated theoretically and experimentally. In the theoretical analysis, the contact force required for particle breakage is solved by using a stress superposition method based on the ball–ball contact model. To verify the theory, particle contact tests of gypsum spheres under three-point contact conditions were carried out. The experimental results are consistent with the theoretical prediction. Different from the ball–ball contact test, the rupture surface after breakage is a fixed plane passing through all three contact points under three-point contact conditions. Under multi-point contact conditions, the size of the conical core depends on the normal force on the contact point at the moment of particle breakage. Multi-point contact makes particle breakage more difficult, and the stronger the constraint of surrounding spheres, the more difficult it is for the particle to break. Both the theory and the experiment provide evidence that the arrangement of particles affects the overall strength of the coarse-grained soil structure.

Study on Particle Breakage and Strength Characteristic of Different Coarse-Grain Contents

2012 ◽  
Vol 246-247 ◽  
pp. 1037-1041
Author(s):  
Guang Jin Wang ◽  
Yue Tong Si ◽  
Xiang Yun Kong
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Large Scale ◽  
Particle Breakage ◽  
Coarse Grained ◽  
Stress Strain ◽  
Breakage Rate ◽  
Deep Soils ◽  
The Relationship ◽  
Coarse Grained Soil

The significant particle size grading and the particle breakage of deep soils are two major characteristics of super-high dumping-site. Based on the refitted large-scale direct shear experiments, this paper studied the particle breakage and shear strength of different coarse-grained soil. The experimental results indicates a conclusion: particle breakage index is very small when upright stress is less than 400kPa .The breakage rate increases obviously with the increase of upright stress. The particle breakage index is very little when coarse-grained contents are less than 46.0% .It increases significantly when coarse-grained contents are larger than 46.0%. Hyperbolic curves can express the relationship between particle breakage index and upright stress. The experiments studied on shear strength shows that the shear stress-strain curves are micro-softening model or micro-hardening model under low upright stress. The curves are slight-softening model at higher upright stress when the coarse-grained contents are equal to 24.0%. At coarse-grained contents equal 78.0%, the shear stress-strain curves are softening model under low upright stress. The shear strength envelope expressed nonlinear under higher upright stress.

scholarly journals ELUTION CONTROL OF Cr（Ⅵ）FROM VOLCANIC COARSE-GRAINED SOIL IMPROVED WITH CEMENT

2017 ◽  
Vol 71 (1) ◽  
pp. 661-666 ◽  
Author(s):  
Munehisa YOSHIDA ◽  
Toshiya KITAMURA ◽  
Hideyuki KATSUSHIMA ◽  
Keisuke KONDO
Keyword(s):  
Coarse Grained ◽  
Coarse Grained Soil
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