How is a Sieve Analysis made? 6-Step Guide
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Mobile Crushing, Screening & Conveying Equipment
An Aggregate Sieve Analysis Test is Used to Assess the Aggregate Gradation
A gradation analysis (or sieve analysis) is a procedure used to assess the particle size distribution (gradation) of a granular material by allowing the material to pass through a series of sieves of progressively smaller mesh size and weighing the amount of material that is stopped by each sieve as a fraction of the whole mass.
The size distribution is often of critical importance to the way the material performs in use.
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And This is How a Sieve Analys is is Made:
1. Collect the Sample
Samples should be taken directly from the discharge conveyor. If you take a sample from a pile, the material was subject to segregation in the stockpiling process and falsifies the results. This can be achieved by dragging a bucket underneath the conveyor across with a rope. While this is a dangerous process it gives you the most accurate sample.
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2. Weigh the Sample to Ensure You Have Enough Material
The collected sample is weighted to ensure you have enough material. For Certain DOT specifications, you need to collect a certain minimum weight of material to get to a specific DOT-approved sieve analysis because the test procedure often includes the split of the material sample into several sub-samples.
3. Dry the Sample in an Oven
The drying process is a very important step because the weight will be the key indicator for creating the aggregate sieve analysis.
Moisture in the material adds weight, falsifying the results.
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4. Reweigh the Sample
This is your reference weight to check if your screening results add up.
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5. Split the Sample evenly
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The dried material is put into a sample splitter that distributes the sample evenly into 2 buckets. Each bucket will be used to create a grading curve.
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6. Screen Sub-Samples to Determine Aggregate Segregation
A screen tower is used to sieve the material and split up the different particles. While the coarse material stays on top, the fines will fall further down in the screen tower.
7. Weigh Each Particle Cartridge and Document Results
Compute and draw a sieve curve.
Sieve Shaker Explained
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