Sieve Analysis 35-325 Wet - SIEV
Notes
See ASTM E-11
This is a very good standard test for +325 mesh PSD in clay bodies and materials. It is much more reliable than a dry sieve analysis since particle agglomeration with the former causes alot of problems.
Procedure
1.
Purpose
This test is best done using a Data Collection Fill-In form. Collect data on a number tests, then enter this into the computer in a batch.
Related information on the theory, purpose, procedure and interpretation for this test is available in the Magic of Fire II book.
2.
Scope
2.1 This test is done to assess particle size of incoming material.
3.
Definitions
3.1 TYLER SIEVE NUMBER
A standard sieve numbering system using the W.S. Tyler Sieve Company.
3.2 MESH
The number of wires per inch on a testing sieve.
4.
Responsibilities
4.1 This procedure is carried out by the quality control technician on powder or dry samples provided by the receiver or collected in production.
5.
Procedure
5.1 If the material is supplied as a chunk of dry clay:
5.1.1 Break the chunk into small pellet no bigger than 3-4 mm and weigh out 100 grams.
5.1.2 Continue as for powder sample.
5.2 If the material is provided as a pugged wet sample:
5.2.1 Roll the pugged clay into a thin slab (about 5 mm) and dry it.
5.2.2 Continue as above for dried chunk.
5.3 Wash powder through sieves
5.3.1 Weigh 100 grams of powder or broken chunks and pour it into about a litre of water. Let stand for a few minutes for powder, for an hour for pellets.
5.3.2 Wash the water/powder mix through the 325# screen until all minus 325 material is gone. If some pellets do not break down well, wash with hot water, or dry the sieve as is and wash a second time.
5.3.3 Reverse wash the oversize material back into the water container.
5.3.4 Stack the sieves from finest to coarsest, with finest at the bottom, and wash the plus 325 material through the stack. Thoroughly spray the material on each sieve to encourage all finer material to fall through each.
5.3.5 Dissassemble the stack of sieves and set in warm area to dry.
5.3.6 Write the material iddentification on a new line on the SIEV logsheet.
5.3.7 Use a brush to remove the oversize material from each screen and weigh it. Write the weight on the logsheet.
5.3.8 Enter the data into the computer using the correct ID# for the body or material. If an ID# does not already exist, assign one.
5.4 Equipment
5.4.1 Tyler root of two series of interlocking testing sieves with soft seive brush.
5.4.2 .01 gram balance
5.4.3 Drying area
5.4.4 Spraying hose and sink
5.5. Safety
5.5.1 Brass sieves can get very hot if dried near a heat source; be careful not to get burned.
5.5.2 Mixing clay/water slurries can generate a lot of dust. Take measures to reduce it and not breathe it.
5.6. Workmanship
5.6.1 Carefully wash all material through each sieve with a repeated back and forth motion.
5.6.2 Do not use too high pressure as this could splatter some of the material out of the sieve.
5.6.3 Wash all material through the finest sieve first, then stack them all up and wash the remainder through. This is a necessity to prevent blinding that causes water overflows and material loss on the finer meshes.
5.6.4 Wash the oversize to the centre of each sieve so it can more easily be brushed out when dry.
5.6.5 If drying is done near a hot kiln, be careful that the temperature will not be high enough to melt the solder on the sieves.
5.6.6 Use the brush carefully on the finer sieves to avoid damaging them.
5.6.7 Watch carefully for rips in the sieves, especially around the edges. Repair with hot glue if necessary.
5.6.8 Watch the stacking order carefully to be sure the sieves are in order during washing.
6.
Reference Documents
Test Definition Report,
Test Procedure Report,
Data Collection Fill-In Form Report.
7.
Reason for Re-issue
Temp 1 Initial Draft
Temp 2 Spelling and Grammer check and minor revisions.
Temp 3 Adjustment in data collection process due to better data entry facilities in the software.
Variables
TOT - Total Weight (V)
The total weight of powder washed through the screens. When weighing, add the water content to the total weight. For example, if the water content is 2.5%, then weight out 102.5 grams.
35M - 35 mesh (V)
The residue left on the 35 mesh screen after drying.
48M - 48 mesh (V)
65M - 65 mesh (V)
100M - 100 mesh (V)
150M - 150 mesh (V)
200M - 200 mesh (V)
325M - 325 mesh (V)
NOTE - Note (V)
Use this to iddentify each specimen if more than one was done.
Out Bound Links
In Bound Links
- (Articles)
Simple Physical Testing to Compare Clay Materials Some of the key tests needed to really understand what a clay is and what it can be used for can be ... - (Articles)
The Physics of Clay Bodies Learn to test your clay bodies and recording the results in an organized way and understanding the p... - (Tests)
P325 - % Passing 325 Mesh Wet
- (Tests)
HEGF - Hegman Fineness
- (Tests)
UPSD - Ultimate Particle Size Distribution
- (Tests)
SADR - Sieve Analysis Dry
- (Tests)
SVWT - Sieve Analysis Wet
- (Materials)
Kaolin - Al2O3.2SiO2 or Al2Si2O5(OH)4 - Hydrated alumina silicate, Pure clay mineral
China Clay
- (Materials)
Ball Clay - Highly Plastic Fine Particle Clay
- (Tests)
AVPS - Average Particle Size (Microns)
- (Glossary)
Splitting
Refers to a phenomenon where a plastic clay develo...
Pictures
Particle size distribution and root-of-two stack of sieves from 48-325 mesh
Preparing a representative powder sample for sieve analysis
Particles from each category in a particle size distribution test of Skagit Fireclay
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