Pre-Screening Milled Asphalt: How ALLU Improved Material Flow at a Chinese Asphalt Recycling Plant
Milled asphalt is a difficult material to process consistently. Fresh off-road rehabilitation projects, milled asphalt appear manageable. However, once stored in stockpiles, the material tends to compact and form larger clumps.
Oversized material can block feeders, overload screening equipment, and place unnecessary strain on downstream crushers. Beyond increased mechanical wear, unplanned stoppages create additional costs through labor downtime, lost production, and schedule disruptions. For one high-volume asphalt recycling plant, this gap between raw stockpile and usable feed had become a recurring operational challenge.
Pre-Screening Before the Main Process
The plant started using the ALLU DH 3-23 TS25 screening bucket, mounted on a loader already present on-site. The logic was simple: deal with the problem material before it reached the main plant, not after it had already caused disruption.
The loader works directly across the stockpile, loading milled asphalt into the bucket and screening it in a single pass. The material is processed through the 25 mm screening drum, producing clean, sub-25 mm Reclaimed Asphalt Pavement (RAP) ready for downstream processing. Oversized material is separated for further handling.
The 25 mm screening size was selected to match the feed specification of the plant. Maintaining a consistent particle size at this stage helps ensure efficient downstream processing and allows the plant to focus its capacity on production rather than handling inconsistent feed material. For applications with different requirements, the ALLU DH-model is available with multiple screening sizes, helping operators achieve their target particle size without changing the bucket.
Reliable Screening Performance in Daily Operations
Asphalt can be difficult to screen efficiently. Sticky fines and moisture often cause material build-up, reducing separation performance and disrupting production. The ALLU DH 3-23 TS25 bucket has TS blades with a self-cleaning design that helps maintain high throughput while preventing clogging and production interruptions.
The plant’s operations manager explained: “It acts as a gatekeeper. We load it straight from the stockpile, it pulls out the oversize, and what comes through is a consistent 25mm-minus product the line handles without issue. The jams stopped. It just works.”
The Impact on Overall Plant Performance
The value of pre-screening is not to replace the main plant process, but to provide it with more consistent feed material. By separating oversized material before it enters the plant, the ALLU DH-Bucket helps maintain stable material flow and reduces the impact of feed variability on downstream equipment. The result is more predictable production, stable throughput, and reduced wear and maintenance requirements. By adding a simple pre-screening stage, the ALLU DH 3-23 TS25 helped the plant operate more efficiently and consistently throughout the entire process.
Watch the video to see the ALLU screening bucket in action.
Related products
Screening Bucket – D-Series
Other case studies
Recycling of Asphalt, PFA, and More: ALLU & MRD Plant
Discover how MRD Plant in Leicestershire uses ALLU screening buckets, including the DH 4-17 and DS 3-23 models, to revolutionize waste material handling. From recycling asphalt road planings to processing…
Explore customer story
Efficient and Sustainable Lava Processing
Schaumlava Grube Herchenberg GmbH enhances its efficiency and sustainability in lava rocks processing by integrating the ALLU DH 4-17 Screening Bucket directly into quarry operations. By crushing material on-site, the…
Explore customer story
Better backfill in solar padding
To handle smaller jobs where large padding equipment didn’t fit, Ozzies brought in ALLU DN 3-12 buckets – screening material directly into trenches for solar, civil, and water projects with…
Explore customer storyInterested?
Contact our team and we’ll help you find the perfect solution for your business.