When it comes to producing high-quality aggregate, crushing and screening aren’t the only steps that matter. Washing plays a crucial role in ensuring the final product meets required specs—especially for concrete, asphalt, and specialty applications.
At Mellott, we work with producers across the country to integrate washing equipment where it adds the most value to their operations. But where exactly does washing fit into the crushing process?
The Role of Washing in Aggregate Production
After raw material is crushed and screened, it often contains impurities like clay, silt, dust, and lightweight organic material. Left unchecked, these can compromise product quality and performance. That’s where washing and classifying comes in.
Washing helps:
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Improve product spec by removing fine impurities
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Enhance strength and bonding in concrete and asphalt mixes
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Increase resale value of materials like sand and gravel
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Comply with state and DOT regulations
Where It Typically Fits in the Process
Washing generally comes after crushing and screening. Once materials have been sized, washing separates usable aggregate from unwanted fines and
debris.
Depending on your material and application, you might integrate:
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Screw washers for cleaning coarse materials like crushed stone
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Log washers for more aggressive scrubbing of heavy clay or tough deposits
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Sand screws or hydrocyclones for classifying and dewatering sand
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Scalping screens for removing fine material before final stockpiling
Do All Operations Need Washing?
Not always—but if you’re producing for high-spec applications like:
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Ready-mix concrete
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Asphalt mixes
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DOT or municipal projects
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High-end landscaping products
…then washing is often essential. Even for general aggregate, a wash system can elevate product quality and open up new markets.
Washing Solutions from Mellott
Mellott partners with industry leaders like McLanahan and Dieffenbach to deliver complete washing systems—from portable screw washers to custom-designed wash plants.
Our engineering team can help determine:
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Whether washing is right for your site
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The best equipment for your material and tonnage
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How to integrate wash systems with existing crushing spreads
Ready to Clean Up Your Operation?
Whether you’re starting from scratch or looking to retrofit an existing plant, Mellott can help you evaluate where washing fits—and how it can boost both quality and profitability.
Contact us today to talk through your material specs and site goals.
