One of the best investments you can make is a Plant Checkup, which can pinpoint
problems and potential breakdowns before they occur, saving you many thousands
of dollars. The manager of Oldcastle's Amcor Precast plant calculated that
the loss of cement silo aeration, found during a plant checkup, and the erratic batch weights
have cost his company $150,000 in the following 12 months. This was just
one single small issue and we all know that central mix plants need frequent
maintenance. Whether you are an existing customer or not, can you afford to neglect a regular, thorough inspection?
Here's what we do:
- Review of overall plant design for batching speed and
throughput, compared with production needs.
- Production of timing diagram if required, to determine holdups
and their correction.
- Mechanical check of aggregate bins, gates, clinders, hoses and
- Mechanical check of cement silos, screw feeders, dust filters,
aeration and level controls.
- Mechanical check of aggregate and cement scales, gates,
cylinders, vibrators, aeration and filter or return from mixer
(accuracy check not incuded - this to be done by local scale
- Mechanical check of inclined belt, holding hopper, skip hoist
etc. feeding mixer or mixers.
- Mechanical check of mixer including arms, paddles, liner,
discharge doors and connections to water inlet and cement scale.
- Timing of aggregate, cement, water and admixture entry for
optimum speed and best mixing.
- Overall check of admixture dosing system (accuracy check not
- Motor connections, isolation switches, starters and compliance
with OSHA and NEC.
- Transport of mixed concrete from mixer to pouring location or
- Control system - verification of correct operation, speed,
accuracy and possibility of breakdown.
- Method of calling for batches, delivery to buckets or
belts/hoppers, efficiency of delivery to waiting crews.
- Reporting of batches, parameters included and water reporting in
particular, to verify compliance with quality standards.
A written report details any unresolved issues. In addition, we suggest
any potential improvements that can help speed up production, eliminate
waiting time for crews and improve quality. We
report objectively to allow management to take action. We do not
push sales of new products, but we can make suggestions where
appropriate to improve performance.