Digitalfire Test Procedure Database

Ultimate Particle Size Distribution - UPSD

Notes

This refers to ultimate particle size, it cannot be measured by using sieves, the units are microns. Testing equipment or a water sedimentation method must be used.

Typically it is expressed as cumulative undersize, that is, a series of percentage numbers matching a series of successively smaller micron measurements. Each of the numbers is the percentage of particles smaller than the specified micron particle size.

Comparative sedimentation tests in water can be also be done using a minimum of equipment. Where a range of particle sizes are present you can see them as layers after the sedimentation. Of course, a standard method needs to be developed so that each test uses a specific amount of water and clay or mineral powder. Clay powder should be prepared by pulverizing completely dry material so it slakes as much as possible in the water. The suspension should have plenty of water so that particles are free to fall.

Variables

VAL - Value (V)

Out Bound Links

• (Tests) SIEV - Sieve Analysis 35-325 Wet
• (Glossary) Ultimate Particles

  Physical particles of materials are those we can m...

• (Typecodes) 5: PTT - Particle Tests
• (Glossary) Slake, Slaking

  'Slaking' refers to the breakdown that normally oc...

In Bound Links

• (Tests) AVPS - Average Particle Size (Microns)
• (Tests) SADR - Sieve Analysis Dry