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March 15 - March 19, 2021

What are the pros and cons of specifying sieve sizes for abrasives?


Selected Answers

From Michael Halliwell of Thurber Engineering Ltd. on March 24, 2021:
There are a variety of pros and cons and it will depend on the abrasive selected. Pros would (hopefully) include uniform grit size (hopefully meaning consistent pattern and performance) and a way to gauge breakdown if it is being recycled. Cons: sieve size does not mean anything when it comes to the angularity of the grit, hardness or other factors.

From Tom Schwerdt of TxDOT on March 24, 2021:
An owner/specifier for a blasting job would likely be better served with a performance specification - specify the level of cleanliness, profile and peak density desired.

From Rob Francis of R A Francis Consulting on March 24, 2021:
You normally specify the required profile and leave it to the contractor to select the correct abrasive size. Make sure you specify 'angular' abrasive as shot-shaped abrasive will not give adhesion. You may include environmental requirements such as 'no sand', or specify only allowable abrasives such as 'steel grit or garnet only shall be used'.

From Rick Miller of 415641382 on March 23, 2021:
Every abrasive is different based on physical properties, so specifying a certain sieve size for a job, would likely be built around specific abrasive, and not necessarily a certain profile spec from a range of abrasives. This would limit choices that contractors can make based on the task at hand.

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Tagged categories: Abrasive size; Abrasives; Asia Pacific; EMEA (Europe, Middle East and Africa); Latin America; North America; Surface Preparation


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