The use of particle size distribution integrated with consistency limits for experimentally simulating fine-grained sedimentary units

Based on the taking sample by geological drilling, combined with the fractal principle, analysis on the cracked backfill particle size of its fractal features and strength correlation. Even each backfill sand specimen particle size is difference, but calculation data shows that the particle size of each sand specimen has preferable fractal feature, the sand specimen particle size distribution has remarkable fractal structure by the linear fitted results of the sand specimens. The fractal relationship of strength and particle size distribution shows that with the increased of fractal dimension, the strength of backfill is decreased, that is to say there is negative correlation, the main cause is that the higher parameter D of the fractal dimension, the higher fine-grained content and more non-uniform of the particle size distribution, especially for the thinner full tailings, if properly increasing the content of slightly crude particles, the strength of backfill will be certainly improved to some extent.

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Relationships between particle size, fabric and other factors in some Australian soils

Soil Research ◽

10.1071/sr9790029 ◽

1979 ◽

Vol 17 (1) ◽

pp. 29 ◽

Cited By ~ 17

Author(s):

R Brewer

Keyword(s):

Particle Size ◽

Organic Matter ◽

Particle Size Distribution ◽

Size Distribution ◽

Thin Sections ◽

Fine Grained ◽

Related Distribution

Soil fabrics at the level of related distribution of f-matrix (usually finer material) to f-members (usually coarser units) are considered in relation to particle size distribution for a number of randomly selected Australian profiles. Three major fabric continua are recognized: the chlamydic iunctic and matrigranic sequences. The majority of samples in the first two sequences have ratios of clay to silt greater and less than one, respectively, and successive stages correlate with increasing proportions of silt plus clay; fabrics of samples that fall out of sequence in relation to percentage of silt plus clay are explained on the basis of composition and/or specific processes, especially fine-grained carbonates, organic matter, faunal activity, and illuviation. The matrigranic sequence does not correlate with particle size distribution, but seems to be related to composition and/or specific processes such as faunal activity. The usefulness of the results lies in the possibility of using the conclusions to reduce the number of thin sections required to characterize areas of soil, particularly within restricted areas.

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Investigation of Particle Size Distribution for Fine-Grained Soil Using a Grain Size Analysis Equipment Automated by X-ray Method

SOILS AND FOUNDATIONS ◽

10.3208/sandf.40.2_127 ◽

2000 ◽

Vol 40 (2) ◽

pp. 127-133

Author(s):

Yukio Furukawa ◽

Tatsushi Fujita ◽

Tadayuki Kunihiro ◽

Hisashi Tsuchiya ◽

Yukio Saito

Keyword(s):

Particle Size ◽

Grain Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Grain Size Analysis ◽

Size Analysis ◽

Ray Method ◽

X Ray ◽

Fine Grained ◽

Fine Grained Soil

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Investigation of the Particle Shape and the Particle Size Distribution of Fine Bulk Solids by the Example of the Shale Cyclone Ash

KnE Materials Science ◽

10.18502/kms.v2i2.960 ◽

2017 ◽

Vol 2 (2) ◽

pp. 141

Author(s):

V.Y. Putilov ◽

I.V. Putilova ◽

D. Kaminska

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Particle Shape ◽

Two Dimensional ◽

Pneumatic Conveying ◽

Fine Grained ◽

Bulk Solids ◽

Shale Ash ◽

Shape Of Particles

<p class="TTPAbstract">The article contains brief information on pneumatic conveying of fine-grained polydisperse bulk solids, as well as on the shape of particles. A method for measuring the particle shape developed by Kamika company is described. The determinations of the particle shape as well as the particle size distribution of the shale ash sample using a two-dimensional IPS UA Kamika particle size distribution analyzer are presented.</p>

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Use of a Laser Diffractometer to Obtain the Particle Size Distribution of Fine-Grained Soils

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198118755712 ◽

2018 ◽

Vol 2672 (52) ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Jessica A. Galacgac ◽

Phillip S. K. Ooi

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Imaginary Component ◽

Test Duration ◽

Untreated Soil ◽

Fine Grained ◽

Test Parameters ◽

Pre Treatment ◽

Mineralogical Compositions

Obtaining the particle size distribution (PSD) of fine-grained soils in hydrometer testing has several shortcomings, particularly long test duration, whereas a laser diffractometer can provide a soil’s PSD relatively expediently. PSDs of the finer fraction of several Hawaiian soils using laser diffraction were compared with those from hydrometer testing. The objective was to investigate some key test variables affecting laser diffractometer PSDs including circulation duration, soil pre-treatment with a deflocculant, and the values of test parameters. The following conclusions are drawn. PSD becomes finer with increasing circulation duration. Circulation duration can be excessively large when attempting to match the laser diffractometer and hydrometer PSDs for the untreated soil. Soil should be pre-treated with sodium hexametaphosphate to decrease the circulation or test duration. The larger the real portion of the refractive index (RI), the coarser the soil. RI values must be calibrated for different laser diffractometer models and for different mineralogical compositions as the RI is a function of not only particle size and mineral composition but also the particle shape and light wavelength and different laser diffractometer models utilize different light wavelengths. The smaller the imaginary component of the RI, the more pronounced the finer fraction. The imaginary component also affects the shape of the PSD, especially in the finer spectrum. The optimum real and imaginary values of RI are 1.4 and −0.1i for the laser diffractometer used and for the fines tested in this study, respectively.

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Effect of Grinding Time on the Particle Size Distribution Characteristics of Tuff Powder

Materials Science ◽

10.5755/j02.ms.23526 ◽

2021 ◽

pp. X

Author(s):

Shuhua LIU ◽

Hao WANG ◽

Hongling WANG

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Milling Time ◽

Milling Process ◽

Coarse Grained ◽

Distribution Model ◽

Fine Grained ◽

Fractal Characteristics ◽

Grinding Time

We study the grinding dynamic behavior and particle size distribution (PSD) characteristics of tuff powder. With the analysis of particle size and data of activity test, the results indicate that tuff powder is easy to be ground for the coarse-grained while is difficult for the fine-grained. It is feasible to quantitatively express the milling process of tuff powder by Divas-Aliavden milling dynamic equation. The milling speed and the milling time are negatively correlated, and the grinding efficiency is minimized after 60 min. Equivalent particle size (EPS) is positively linearly correlated with the logarithm of grinding time, while specific surface area (SSA) is inversely correlated, both of them have a highly linear correlation. The PSD of tuff powder, which complies well with the Rosin-Rammler-Bennet (RRB) distribution model, has typical fractal characteristics, and its fractal dimension is also positively correlated with the milling time.

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