VIDEO: ALLU’s new concrete crushing bucket screens and separates scrap from demolition rubble
The output size on the Concrete Screening and Crushing Bucket is adjustable and customizable
Recycling and demolition contractors know the headache of processing concrete and brick rubble — tight sites, messy logistics, and material contaminated with steel.
ALLU's all-new Concrete Screening and Crushing Bucket — an excavator-mounted attachment designed to crush demolition rubble on-site — crushes and screens pulverized concrete directly at the point of demolition.
The new solution allows contractors to process recyclable and demolition materials right where they're generated, improving workflow, reducing unnecessary transportation, and supporting more efficient material recovery.
The ALLU Concrete Bucket goes where a mobile crusher can't
The ALLU Concrete Bucket is designed for excavators in the 25-45 ton class and crushes demolition rubble like concrete, bricks, and asphalt (RAP). It targets scenarios where bringing in a separate mobile crusher is inefficient or simply not possible, helping recyclers reduce hauling requirements, simplify logistics, and allow reusable aggregates to be produced more efficiently.
The bucket can also be used to increase a mobile crusher's capacity by pre-crushing and feeding with the same attachment at demolition or recycling sites.
"Contractors don't need another machine to manage on a crowded job site; they need a practical way to turn rubble into usable material with the excavator they already have," said Antti Rautamies, R&D project manager at ALLU. "This bucket is built for the real world: fines-heavy material streams, tight spaces, and reinforced concrete that doesn't arrive ‘clean'."
Handles steel and metal scrap without damaging the bucket
Steel in the feed is one of the fastest ways to ruin productivity. The ALLU Concrete Bucket is designed to handle steel and rebar when working with reinforced concrete, helping keep the job moving and reducing "stop-and-clear" time that can kill production on demolition work.
The bucket utilizes rotating drums equipped with replaceable carbide picks, working together with a counter-blade structure, to continuously crush and screen material. This design promotes a consistent material flow while reducing oversized concrete into reusable aggregate suitable for recycling, backfilling, road construction, and other civil engineering applications.
The rotating drum technology has been developed to withstand demanding demolition environments while providing reliable performance throughout extended operating periods. Replaceable wear components allow routine maintenance to be completed directly at the job site, helping contractors minimize downtime and keep equipment in service without lengthy interruptions. Compatible carriers can also utilize ALLU's Drain Line Eliminator hydraulic technology, further simplifying installation and improving operational efficiency.
Productivity across recycling applications
Different sites and different next steps need different outputs. The bucket features a changeable counter blade setup that supports output sizes of 0-50 mm and 0-100 mm. That means crews can aim for the right balance of fragment size and productivity without changing the whole flow of the job.
The bucket is designed for exceptional production capacity with high fines content, with processing capacity up to 100 t/h and max feed size 300 mm (site conditions and carrier will affect results).
Simple serviceability in a heavy-duty frame
ALLU's design focus is simple: build it for daily work and make wear part changes straightforward. The bucket includes a heavy-duty frame structure with a 40 mm cutting edge and 30 mm side cutters, designed to withstand breakout forces of excavators up to 45 tons.
The crushing drums and blades are still under the final R&D work, but many successful tests have been conducted in real-life surroundings, utilizing multiple innovative ALLU drum and blade configurations. A counter blade structure forms the crushing chamber, and the bucket uses two alternative rotating directions to support a continuously effective crushing operation while screening fines quickly through the bucket.
Hydraulic requirement: 190 - 315 l/min (50 - 83 gpm) oil flow at 300 bar (4,350 psi); typical operating power ~60-100 kW. Fuel consumption with a 40-ton excavator is noted at ~30 l/h.
