Limestone Crushing

Limestone crushing with a screening bucket on a Hitachi excavator: efficiently reduce 0-300 mm boulders to 0-90 mm for road construction.
Case study

Limestone Crushing with a screening bucket

Oman

Material Limestone

Industry Crushing, Quarrying, Roadworks

Application Limestone Crushing

Function Break down large limestone boulders

Model M 3-25 X75

Crushing large volumes of limestone effectively calls for equipment that guarantees speed and accuracy. In the demanding environment of Oman, a customer chose the ALLU M 3-25 screening bucket, mounted on a Hitachi 90-tonne excavator, to handle limestone boulders with precision and speed. This solution not only eliminated the need for a conventional crusher but also transformed operations into a one-step process that saved time, reduced costs, and minimized environmental impact.

The Challenge: Crushing Limestone Boulders for Road Construction

The customer’s challenge was to break down large limestone boulders ranging from 0 to 300 mm into smaller, manageable pieces, specifically between 0 and 90 mm. The material needed to be prepared as sub-base for the internal road construction at the Royal Oman Police Headquarters. Conventionally, this would require multiple machines and permits to set up a traditional crusher on-site, causing additional costs and logistical complexities.

The ALLU Solution: One-Step Operation with M 3-25 Screening Bucket

Choosing the ALLU M 3-25 X75 over a traditional crusher setup, the customer valued its capacity to condense several stages of the process into one seamless operation. Mounted on a Hitachi 90-tonne excavator, the ALLU screening bucket ensured a smooth, efficient workflow throughout the operation. The excavator simply picked up the boulders, crushed them to the desired size, and loaded them directly onto trucks for transport.

This one-step operation not only saved the customer significant time and reduced the need for additional equipment but also minimized environmental impact by reducing fuel consumption and the overall number of machines on-site. The crushed material was perfectly sized for the sub-base application, helping ensure that the project was completed efficiently and on time.

Key Benefits of the ALLU Screening Bucket:

  1. Cost-Efficient Versatility: By choosing this screening bucket, the customer bypassed the permits and costs of a conventional crusher, while handling a large-scale operation with one versatile attachment.
  2. One-Step Process: The ALLU screening bucket streamlined the operation into a single process, from picking up material to crushing and loading it onto trucks.
  3. Sustainable Precision: Fewer machines on-site meant reduced emissions and fuel consumption, while the bucket’s precision ensured perfectly sized material for sub-base road construction.

Why ALLU Stands Out for Material Processing

ALLU’s innovative screening and crushing buckets, like the M 3-25, are engineered for large-scale operations in industries such as construction and mining. Designed for efficiency, they reduce the need for multiple machines while boosting productivity and streamlining job site processes. Whether you’re crushing limestone, screening soil, or preparing materials for road construction, ALLU delivers reliable, durable equipment that can handle even the toughest materials, transforming how you approach material handling.

Learn more about the ALLU M 3-25 bucket and how it can help streamline your next project. Visit our website or contact us today to explore the full range of ALLU solutions.

Screening Bucket – M-Series

Carriers 50 – 120 t
Large M-Series Screening Crushing Bucket is designed for large-scale material processing and screening applications. It’s compatible with large excavators and wheel loaders.

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ALLU Transformer Screener Crusher Aerating Compost

Sweden

Material Wet sludge

Industry Aerating, Composting, Crushing, Mixing, Screening

Application Aerating

Function Aerating, Composting, Crushing, Screening, Mixing

Model ALLLU Transformer DS 4-23 screener crusher with XHD60 blades

Problem

Wet, lumpy contaminated sludge material was causing delays to the composting process of a Swedish company.

Solution

The material was screened, shredded and aerated using an ALLU Transformer screening bucket which enabled composting to be accomplished more quickly, effectively and efficiently.

Benefit

The entire composting operation is no longer hindered by wet clumps of sludge. The process is now more efficient as all screening, shredding and aerating is done in a one-step operation, making composting and material reuse faster and more effective.   TRANSFORMING YOUR EFFICIENCY.

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ALLU Transformer Screener Crusher Screening and Recycling Demolition Waste

Finland

Material Demolition waste

Industry Crushing, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling

Model ALLU Transformer DN 3-17 screener crusher with TS 25 crushing Axe blade setup

Problem

On a site set aside for construction, demolition waste, including concrete, wood, metal and fines cannot be processed further, with the area needing to be cleaned and the material dealt with before any new buildings could be built. 

Solution

The waste was processed with an ALLU Transformer screener crusher. About 30% of the material could be reused as a construction material, with about 10%, including the wood and metal, being separated and recycled properly. The rest of the material comprised of concrete which was crushed and reused as sub base and for foundations.

Benefit

By processing the waste with the ALLU Transformer screener crusher, there were considerable savings made in landfill fees and transportation costs as only about 10% was transported to landfill. The rest of the material was reutilized on the new construction site.   TRANSFORMING YOUR GREEN CREDENTIALS.

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ALLU Transformer Screener Crusher Crushing Bricks

Finland

Material Defective bricks

Industry Crushing, Industrial Applications, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling, Industrial applications

Model ALLU Transformer DH 4-17 screener crusher with X75 blades

Problem

A certain amount of waste and rejects is endemic in the production of bricks, requiring an effective solution for the recycling of any found to be defective.

Solution

The defective bricks were crushed with an ALLU Transformer screener crusher with the crushed material being reused in brick production.

Benefit

By processing the material with an ALLU Transformer screener crusher, any defective bricks can be reused in the production process. The ALLU Transformer screening bucket is a mobile solution, which in this instance replaced a large and ineffective stationary crusher on site.   TRANSFORMING YOUR MACHINES.

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ALLU Transformer Screener Crusher Separating Topsoil from Tree Stumps

Finland

Material Tree stumps, sawdust and topsoil

Industry Crushing, Industrial Applications, Recycling, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Recycling, Waste material handling, Industrial applications

Model ALLU Transformer DSB 2-12 screener crusher

Problem

Topsoil and sawdust needed to be separated from tree stumps so that both can be effectively recycled.

Solution

The tree stumps were screened with an ALLU Transformer screening bucket. This process separates the topsoil from the stumps making both materials reusable. In addition, the stumps are shredded with an ALLU Transformer screener crusher with the material turned into compost.

Benefit

The use of the ALLU Transformer screener crusher meant that all the materials can be reused, with the topsoil and saw dust being sold as valuable products, whilst the tree stumps were shredded for use as compost, thereby reducing both transport and landfill costs.   TRANSFORMING YOUR GREEN CREDENTIALS.

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ALLU Transformer Screener Crusher Screening and Mixing Construction Waste

Italy

Material Construction waste

Industry Crushing, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling

Model ALLU Transformer DSB 2-17 screener crusher with TS25 blade setup

Problem

Construction waste comprising of concrete, metal and other construction materials requires processing before reuse. If left unprocessed, the material cannot be further utilized meaning that the contractor is subject to expensive transportation costs and landfill fees.

Solution

The material was processed with an ALLU Transformer screener crusher. The concrete was crushed and then recycled; the metal pieces were separated from the material and further recycled with the fines being used as fill and sub base.

Benefit

By processing the waste with an ALLU Transformer screener crusher, there wasn’t a need for expensive transportation costs and no landfill fees. The fines material was reused and all the materials were recycled correctly.   TRANSFORMING YOUR GREEN CREDENTIALS.

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Finland

Material Field bark from logs at a sawmill

Industry Crushing, Industrial Applications, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling, Industrial applications

Model ALLU Transformer DS 4-23 screener crusher with crushing XHD blade setup

Problem

Field bark that has gathered at a sawmill’s field from processed logs has become a problem. If it is treated as waste the sawmill will be liable to both transport and landfill costs.

Solution

The material is fine screened with an ALLU Transformer screener crusher and then used at a local power plant. The quality is important, as if it is to be used as a power source, the material cannot include stones, metal or any other contaminants.

Benefit

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Japan

Material Field bark at a sawmill

Industry Crushing, Industrial Applications, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling, Industrial applications

Model ALLU Transformer DN 2-12 with TS35 Axe blades

Problem

Field bark had accumulated at a sawmill’s field from processed logs. If this were to be treated as waste, the sawmill would be faced with high transport and landfill costs.

Solution

Field bark can be further utilized and resold. In order to generate an income from it, the field bark must be shredded into fine and homogenous pieces. This can be achieved with an ALLU Transformer screener crusher bucket.

Benefit

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ALLU Transformer Screener Crusher Assuring Quality in Concrete Production

Finland

Material Sand and gravel, crushed gravel

Industry Crushing, Industrial Applications, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Industrial applications

Model ALLU Transformer screener crusher DN 3-17 with TS 16 blades

Problem

Quality assurance and control in concrete production are important. This involves dealing with lumped, hardened, and frozen sand and gravel that comprised of lumps too big to be fed into the feeder silo at the concrete plant.

Solution

The frozen and hardened sand, gravel and rocks can be crushed with an ALLU Transformer screener crusher before being fed into the silo. This step ensures that the feeder doesn’t get blocked due to the presence of large lumps meaning that the quality of the concrete remains consistent.

Benefit

Quality assurance through the use of the ALLU Transformer screening bucket ensures that the production process is made more efficient, with no stoppages. Also, all materials can be used on the production due to the transforming nature of the ALLU equipment.   TRANSFORMING YOUR EFFICIENCY.

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ALLU Transformer Screener Crusher Processing Construction Waste

Greece

Material Construction waste

Industry Crushing, Industrial Applications, Screening, Waste material handling

Application Crushing

Function Crushing, Screening, Waste material handling

Model ALLU Transformer DSH 3-17 screener crusher with X75 drums

Problem

Construction waste emanating from a development project needed to be processed for disposal, with material for re-use being separated from material to be landfilled. Due to the large particles in the construction waste, its reuse had proved to be impossible because of the lack of an efficient screening system. This could have led to the disposal of all the material in the landfill. As a result, the contractor would have incurred additional haulage and landfill costs.

Solution

The construction waste was screened and crushed using the ALLU Transformer screening bucket. Processed material could now be used as the foundation material for buildings. Only a small portion of the material had to be disposed of in a landfill.

Benefit

Less material to landfill and efficient utilization of waste material supports sustainability. It also reduces extra costs incurred due to reduced landfill payments and at the same time generates income from recycling and utilizing the processed material. Furthermore, haulage costs and negative environmental impact are reduced as there is no need to remove the existing material nor buy in new.  

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