Choosing a Mobile Crushing & Screening Subcontractor

1. A proven track record

Experience matters, particularly on large or technically demanding projects. A subcontractor should be able to point to similar materials, production environments and site conditions. Previous work on renewable energy, road construction or mining projects shows whether they understand the logistical and operational demands involved, and gives greater confidence that they know what is required once the plant is established on site.

2. Suitable and reliable crushing and screening plant

The plant needs to suit the raw material, feed size, required production rate and final products. A mobile jaw crusher may be enough on one project, while another needs a jaw crusher and a cone crusher in combination. The question to ask is not simply “what crusher do you have?” but “can you provide and configure the right crushing and screening train for what we need to produce?”

Reliability is just as important. Unexpected downtime affects not only crushing and screening, but loading, hauling, stockpiling and the construction activities that depend on the material. Eco-Match runs a McCloskey fleet for this reason; you can read why we run McCloskey plant.

3. Competent and experienced operators

Good equipment still needs good operators. Experienced operators manage feed material, monitor the plant and identify potential issues before they become production problems. Competent staff stay focused on safe operation, pre-start inspections, correct crusher and screen settings, material flow, production requirements and site-specific safety procedures. Reliable plant and experienced people together are what make production consistent. This is closely tied to compliance and on-site competency.

4. A clear understanding of the final product

The objective is not simply to make rock smaller, but to produce the required final products in line with the applicable COLTO (Committee of Land Transport Officials) and COTO (Committee of Transport Officials) grading requirements. COTO 2020 is the current standard for road and bridge works and has replaced the earlier COLTO specification. The required product size, grading envelope, application and project specification should all be considered before the configuration is set. Producing a G5 material calls for a different approach from a 19 mm concrete stone or a larger road stone. At Eco-Match we work backwards from the required end product, configuring the plant around the aggregate products needed rather than the other way around.

5. The ability to configure the crushing train

Different projects need different configurations. Depending on the feed material and final product, a circuit could run primary jaw crusher to screen, or primary jaw crusher to cone crusher to screen. The way the plant is configured has a significant effect on production, product grading, recirculation, fuel efficiency, wear rates and overall operating cost. This is where a subcontractor’s experience shows.

6. Realistic production capacity

Production targets should be realistic and based on the specific application, not a manufacturer’s maximum theoretical figure. Actual production is influenced by feed size, material hardness, density, moisture, feed consistency, crusher settings, screen configuration, required grading, recirculation and loading efficiency. A good subcontractor can discuss expected production against the actual material and site conditions.

7. Health and safety compliance

Mobile crushing and screening involves heavy machinery, moving components, conveyors, high noise, dust and interaction with other site activities. The subcontractor should have the systems and procedures to comply with the principal contractor’s requirements, covering operator competency, PPE, pre-start inspections, maintenance, emergency procedures, site inductions, medicals and safety files. Safety belongs in the assessment of capability, not as an administrative step after appointment.

8. Maintenance and breakdown support

Even well-maintained plant can have issues when processing large volumes in demanding conditions. What matters is how quickly they are identified and managed. Look for a clear approach to routine servicing, preventative maintenance, technical support, wear-part management and breakdown response. Monitoring wear components such as jaw plates, crusher liners and conveyor parts helps prevent unexpected failures, and a proactive approach limits the knock-on effect a standing plant has on material supply, loading, hauling and the wider programme.

A quick checklist

Eco-Match has produced aggregate on renewable energy, mining and road projects across Southern Africa. See our recent projects or read why clients choose Eco-Match.