Inspection process
Batch plant inspection
Also called: plant inspection, concrete plant inspection, ready-mix plant check
Batch plant inspection moves the quality check upstream to where the concrete is made: confirming the plant is producing the approved mix design, that materials and proportions match what was submitted, and that scales, water and admixture dosing are in order. It is a source inspection — catching a problem at the plant before a truck ever leaves means the whole day's placement is not built on a mix that was wrong from the start. It complements the field check of slump, temperature and cylinders when the truck arrives.
Why it matters
Concrete is one of the few materials on a job that is manufactured to order the same day it is installed, so its quality is set before it reaches the site. A drifting mix, the wrong proportions or a dosing error at the plant shows up as low strength weeks later in the cylinder breaks — long after the member is placed and loaded. Verifying the source is how that risk is managed at the front end.
For most jobs this is done by a qualified testing agency rather than field staff, and the field role is to see that the plant is approved, that batch tickets match the design, and that the reports land in the record — not to certify the plant.
How it shows up on site
A testing agency verifying the plant's mix design and calibration, batch tickets checked against the approved design as trucks arrive, and field tests of slump, air, temperature and strength cylinders tying each delivery back to what the plant reported.
Standards it's verified against
Checklists that put batch plant inspection to work
Free, field-ready checklists, each with the photo every item needs before it can be submitted.
Related terms
- Batch ticket (delivery ticket)The ticket that comes with each concrete truck, recording the mix, quantity, water and time so the delivered load can be verified and traced.
- Test reportThe documented result of a test run on installed work or material, recording what was tested, how, and whether it met the criteria.
- Special inspectorA qualified inspector who verifies specific high-risk work — welds, bolting, concrete, anchors — beyond the routine building inspection.
- Receiving inspectionThe check of materials and equipment when they arrive on site, confirming what showed up matches what was approved before it gets installed.
- Hold pointA stop in the inspection and test plan where work cannot continue until a required party inspects and signs off the release.
- Witness pointA step where a party is invited to observe the work, but the crew may proceed if that party doesn't attend within the agreed notice.
Knowing the term is step one. Proving it is the job.
RTI holds the submit button until every mandatory item is answered and the photos are attached, then chains the record so it can be proven untouched later.