Aggregates — such as gravel, sand, or crushed stone — are among the world’s most important building materials. Roughly 60-75% of concrete is comprised of aggregates, and aggregates make up around 90% of paving asphalt. To create strong, stable construction materials, the aggregate used must...
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Sand is an important construction aggregate used in the production of concrete mixes. However, before it can be used for concrete and cement production, sand must meet specific grain size and cleanliness requirements. As concrete mix specifications change, so too must the aggregate used in...
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Processing sand and gravel products for a variety of specific market applications requires the use of different combinations of equipment. Fine material screw washers are a commonly deployed piece of sand classifier equipment. Below, we’ll outline several maintenance tips to help prevent costly repairs and downtime...
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In Part 1 of our discussion on manufactured sand (mansand) we talked about the Ortner® Sand Washer and its ability to remove unwanted fines from screenings while using very little water. But what if washing is not an option, due to: No water available Cost...
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Sand is a key component of many stone mixes, especially paving mixes like asphalt and concrete. Paving mixes require a specific range of stone sizes, which is usually accomplished by screening to produce specific size fractions that are then blended together to meet the mix specifications. Stone...
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There are many ways to remove the fines from sand and crushed stone. Sand screw classifiers, classifying tanks, hydrocyclones, wet screens, log washers and jigs all have their place in sand washing operations, but none of them compare to the the Ortner® Washing System. The Ortner® can handle...
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