scholarly journals Effect of Particle Size and Composition of Marble Quarry Waste on the Properties of Artificial Marble

2021 ◽  
Vol 920 (1) ◽  
pp. 012004
Author(s):  
H A Samad ◽  
R A Rashid ◽  
Z Zakaria
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Water Absorption ◽  
Compression Strength ◽  
Fine Particle ◽  
Vacuum Condition ◽  
Coarse Particle ◽  
Coarse Particles ◽  
Effect Of Particle Size ◽  
Marble Waste

Abstract The purpose of this study was to characterize and investigate the performance of local marble quarry waste to assess its use as filler in producing artificial marble. Marble waste was obtained from marble quarry located in Simpang Pulai, Ipoh and sieved into two different sizes; < 2mm as coarse particle and < 250 μm as fine particle. The artificial marble was prepared under vacuum condition and the composition of fine and coarse particles were modified between 40-70% (wt.) and 0-30% (wt.), respectively. The artificial marble was evaluated their performance by water absorption, flexural strength, compression strength, and Barcol hardness properties. It was found that artificial marble prepared with 60% (wt.) of fine particle and 10% (wt.) of coarse particle showed the best overall properties leading to a lowest water absorption and good flexural and compression strength. However, modification of marble waste content in the composition of artificial marble showed insignificant influence on Barcol hardness properties.

scholarly journals Influence of milling whole wheat grains and particle size on thermo-mechanical properties of flour using Mixolab

2019 ◽  
Vol 37 (No. 4) ◽  
pp. 276-284 ◽  
Author(s):  
Joseane Bressiani ◽  
Tatiana Oro ◽  
Paola Da Silva ◽  
Flávio Montenegro ◽  
Telma Bertolin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Water Absorption ◽  
Whole Grain ◽  
Retention Capacity ◽  
Whole Wheat ◽  
Solvent Retention ◽  
Protein Properties ◽  
Negative Effect ◽  
Effect Of Particle Size

Whole grain wheat flour (WG) of three different particles sizes (194.9, 609.4, and 830.0 µm) was prepared by milling whole grain. The effect of particle size on the thermo-mechanical properties of flour was investigated using Mixolab equipment and solvent retention capacity (SRC). The results showed that particle size influences the functionality of the gluten network. The SRC test revealed that the water absorption increased from 77.43% to 85.76%, with decrease in particle size. The C2 (protein weakening) values were correlated with the values for water absorption in the SRC and wet gluten test, respectively. The degree of gelatinization of starch (C3) showed that the presence of the fibers in the WG samples limited the availability of water to the starch, and this effect was especially true for flour with smaller particle size. In summary, the Mixolab equipment allowed a better understanding of the functionality of WG with regard to the behavior of protein properties. WG with coarse particles demonstrated a greater impact on the gluten network, indicating a negative effect on the baking quality.

Effect of Particle Size on Some Properties of Rice Husk Particleboard

2007 ◽  
Vol 18-19 ◽  
pp. 43-48 ◽  
Author(s):  
J.O. Osarenmwinda ◽  
J.C. Nwachukwu
Keyword(s):  
Particle Size ◽  
Physical Properties ◽  
Water Absorption ◽  
Rice Husk ◽  
Modulus Of Elasticity ◽  
Internal Bond ◽  
Elasticity Modulus ◽  
Modulus Of Rupture ◽  
Thickness Swelling ◽  
Effect Of Particle Size

The purpose of this study was to determine the effect of particle size on the mechanical properties (Modulus of Elasticity, Modulus of Rupture, and Internal Bond) and physical properties (thickness swelling and water absorption) of rice husk particleboard. The particle sizes used were 1.0mm, 1.18mm, 2mm, 2.36mm and 2.80mm. Each was mixed with a constant resin (urea formaldehyde) concentration of 20% of oven dry weight of rice husk particles. The results showed that as the particle size increased, the particleboard’s mechanical and physical properties decreased. For example, the modulus of elasticity, modulus of rupture, internal bond, thickness swelling and water absorption for 1.0mm particle size particleboard were 1590N/mm2, 11.11N/mm2, 0.28N/mm2,10.90% and 38.53% respectively, while for 2.8mm particle size they were 1958N/mm2,14.2N/mm2, 0.44N/mm2, 11.51% and 47.21% respectively. Overall results showed that particleboard made from rice husk exceed the EN standard for modulus of elasticity, modulus of rupture, internal bond. However, thickness swelling values were poor. Hence, the smaller the particle size the better the properties of the particleboard.

INFLUENCE OF FEED PARTICLE SIZE ONpH, CARBOHYDRATE CONTENT, AND VISCOSITY OF RUMEN FLUID

1973 ◽  
Vol 53 (3) ◽  
pp. 417-422 ◽  
Author(s):  
K.-J. CHENG ◽  
R. HIRONAKA
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Rumen Fluid ◽  
Geometric Mean ◽  
Coarse Particle ◽  
Soluble Carbohydrate ◽  
Mean Particle Size ◽  
Fine Particle Size ◽  
Fluid Properties ◽  
Carbohydrate Levels

Four fistulated cows were used to compare the rumen fluid properties produced from feeding all-concentrate feeds of fine (344 μ), or coarse (519 μ) geometric mean particle size, or alfalfa hay. A severe frothy condition developed in the rumens of cows fed the fine particle size feed but not in the rumens of cows fed the coarse or hay diets. The average viscosity of rumen fluid from cows fed hay was 7.4 centipoises (cP), about 14.7 cP when fed the coarse feed, and about 30.7 cP when fed the fine feed. After the cows became accustomed to their feed, rumen fluid pH declined from 6.5 to 5.6 when fed the fine particle feed and from 6.9 to 6.0 when fed the coarse. The rumen fluid from the cows fed the fine feed exhibited two viscosity maxima, between pH 5.5 and 5.8, and between pH 7.5 and 8.5, whereas the viscosity of the rumen fluid from the cows fed the coarse feed was not influenced by pH. Soluble carbohydrate levels were 650 μg/ml in the rumen fluid of cows fed the coarse-particle diet and over 1,000 μg/ml in that from cows fed the fine-particle feed. Cows fed hay had less than 300 μg/ml of soluble carbohydrate in the rumen fluid.

Effect of Particle Size on the Biological Availability of Reduced Iron

1975 ◽  
Vol 58 (1) ◽  
pp. 99-103 ◽  
Author(s):  
Ilary Motzok ◽  
Murray D Pennell ◽  
Muriel I Davies ◽  
Henry U Ross
Keyword(s):  
Particle Size ◽  
Marked Effect ◽  
Milk Powder ◽  
Skim Milk ◽  
Skim Milk Powder ◽  
Coarse Particles ◽  
Feeding Period ◽  
Biological Availability ◽  
Effect Of Particle Size

Abstract A sample of reduced iron was separated by air elutriation into several fractions based on particle size; and the relative biological values (RBVs) of 3 fractions containing fine, medium, and coarse particles were determined with rats and chicks, using diets containing either skim milk powder or casein as the major source of protein. The RBV of reduced iron for rats was shown to be dependent on particle size by curative and prophylactic assay procedures, with the source of protein having no marked effect. In contrast to rats, chicks utilized reduced iron to a higher degree, especially the iron from coarse particles. Prophylactic assays with rats indicated that a 3–4 week feeding period from weaning at 21 days of age gave RBVs which were not significantly different from those obtained by repletion of hemoglobin of anemic animals. After 5 weeks on the test diets, however, the rats lost their ability to distinguish between coarse and medium particles of reduced iron when fed with a diet containing casein as the source of protein.

scholarly journals Effect of ZrB2 Particle Size on Pressureless Sintering of ZrB2 - ß-Sic Composites

2019 ◽  
Author(s):  
Rosa Maria da Rocha ◽  
Frank Ferrer Sene ◽  
Mariah de Oliveira Juliani ◽  
Caroline Oliveira Davi
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Average Particle Size ◽  
Theoretical Density ◽  
Average Particle ◽  
Pressureless Sintering ◽  
High Melting Temperature ◽  
Powder Samples ◽  
Effect Of Particle Size ◽  
Sic Composites

Zirconium diboride is an ultra high temperature ceramic material that leads this emerging class of materials because of its distinct combination of properties, including high melting temperature (> 3000 °C) and the lowest theoretical density (6.09 g·cm-3) among the borides. This combination of properties makes ZrB2 candidate for airframe leading edges on sharp-bodied reentry vehicles. In this work, the effect of particle size of ZrB2 on the pressureless sintering of ZrB2-SiC composites was studied, using ZrB2 powder with average particle size of 2.6 and 14.2µm. Four different vol% concentration of ß-SiC (0, 10, 20 and 30 vol%) were added to as-received and planetary milled ZrB2 powder. Samples were pressureless sintered at 2050 °C/1h in argon atmosphere. The reduction of initial ZrB2 particle size led to composites with better results of densification, mechanical properties and oxidation resistance regardless ß-SiC addition, showing relative densities around 92.5 %Theoretical Density (Td) and flexural strength and microhardness around 260 MPa and 17.5 GPa, respectively. Composites processed with as-received ZrB2 powder showed increasing in densification and flexural strength with the SiC content increasing. Relative density varied from 74.7 to 90.8 %TD and flexural strength from 102 to 241 MPa, for 0 and 30 vol% of SiC, respectively.

Effect of particle size on the flexural strength and phase transformation of an airborne-particle abraded yttria-stabilized tetragonal zirconia polycrystal ceramic

2013 ◽  
Vol 110 (6) ◽  
pp. 510-514 ◽  
Author(s):  
Renata Garcia Fonseca ◽  
Filipe de Oliveira Abi-Rached ◽  
José Maurício dos Santos Nunes Reis ◽  
Elisa Rambaldi ◽  
Paolo Baldissara
Keyword(s):  
Particle Size ◽  
Phase Transformation ◽  
Flexural Strength ◽  
Tetragonal Zirconia ◽  
Airborne Particle ◽  
Effect Of Particle Size ◽  
Tetragonal Zirconia Polycrystal

Fine particle concentrators for inhalation exposures—effect of particle size and composition

1997 ◽  
Vol 28 (6) ◽  
pp. 1057-1071 ◽  
Author(s):  
Constantinos Sioutas ◽  
Petros Koutrakis ◽  
John J. Godleski ◽  
Stephen T. Ferguson ◽  
Chong S. Kim ◽  
...  
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Effect Of Particle Size

Influence of Particle Size and Soak Conditions of the Species Simarouba amara on Cement-Wood Composites

2016 ◽  
Vol 881 ◽  
pp. 265-270 ◽  
Author(s):  
H.J.C.L. Bezerra ◽  
S.J. Pereira ◽  
Edson Jansen Pedrosa Miranda Jr. ◽  
A.E.M. Paiva ◽  
F.S. Politi
Keyword(s):  
Particle Size ◽  
Flexural Strength ◽  
Mechanical Strength ◽  
Heat Of Hydration ◽  
Mix Design ◽  
Cement Composites ◽  
Wood Composite ◽  
Wood Composites ◽  
Effect Of Particle Size ◽  
Wood Cement Composites

The purpose of this work was to produce a mix design rarely reported in the literature on wood-cement composites, i.e., 1:1:0.5 (cement:wood:water). This design was achieved by using CP IV-32 RS cement and adding 4% of ferric chloride additive plus fibers of the species Simarouba amara (paparaúba) retained on ASTM 7 and ASTM 10 sieves. Before mixing the fibers into the cement paste, they were presoaked for 15 minutes to between 84% to 136% of their mass. In these conditions, all the heat of hydration tests presented low inhibition. Panels measuring 300 x 450 x 25 mm were prepared, and the values of compressive and flexural strength of the composite after 28 days showed no significant differences with respect to soak, but the effect of particle size was significant. These results indicate that more fiber can be added in the mix design of this cement-wood composite without changing its mechanical strength, controlling only the presoak conditions.

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