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Have questions about your materials testing equipment? We have the answers to these questions and much more right here! Check back monthly for long-form blog posts, how-to guides and infographics. We’ll address industry insights, the operation and maintenance of specific equipment, and our product line recommendations, all designed to better serve you.
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Verification, calibration, and performance tests all contribute to the accuracy of test sieves. Understanding sieve accuracy will ensure you get the information you need out of your test sieves or screen trays.
Particle sizing with test sieves is a hands-on process with many small, repetitive tasks that must be carried out properly. Selecting the right accessories for each job and using them correctly makes the work faster and easier, but it also significantly affects testing efficiency, accuracy, and repeatability. This article closely examines the tools that optimize test sieving procedures and ensure your sieves meet the requirements of standard test methods.
Test sieves are simple devices, but they are still scientific instruments and the most cost-effective and widely used particle sizing and gradation testing method. This blog article will cover the accuracy verification of sieves, agitation and sieve shakers, accessories, and wet-wash sieves.
The two major standards governing test sieves and appropriate opening sizes are ASTM E11 and ISO 565/3310-1, both of which specify parameters for aperture dimensions, mesh size and statistical variations. We take a dive into sieve sizes and give guidance on the basics, popular test application opening sizes, maintenance, and an opening size conversion table.
Most materials have a lower size limit where sieving with a sieve shaker is no longer sufficient, and the agitation necessary for particle separation starts to break down and destroy some fragile materials. Particles in some substances resist separation and clump together due to electrostatic or moisture issues. For many years, these problems limited the effectiveness of measuring particle size by sieving. This article tells the story of how one man pushed back those boundaries.
High decibel levels can potentially be a dangerous element in your materials testing lab. In part two of our special series on workplace safety, you’ll discover some of the best ways to reduce noise levels during testing.
In part one of our special series on workplace safety, we take a look at how advances in materials testing equipment are minimizing potentially harmful exposure to dust in the lab.
Sieving for particle size distribution is the primary test requested for construction aggregate samples. Whether field samples are being tested to evaluate a new aggregate source or just coming in as part of day-to-day quality control of production, particle size distribution is a primary consideration. If processing and sieving is not handled efficiently, it creates a backlog.
Reference materials for test sieves are used to evaluate and help ensure continued quality performance of sieves in compliance with ASTM or ISO standards. Sieve Verification Services provide further assurance of compliance through laboratory optical or microscopic examination.
Testing sieves are not a one-size-fits-all product in materials testing. They should be selected based on application, compliance standards, sample composition, level of precision required and more.
