Printed at the plant and handed over on site, the ticket lists the mix design number, cubic yards, time batched, admixtures and how much water can still be added without breaking the w/cm limit. Inspectors and foremen read it before the chute swings, since ASTM C94 calls for discharge within 90 minutes or 300 drum revolutions, whichever comes first, unless the buyer waives it. The signed ticket becomes the permanent record of each load in the structure.
Batch ticket says 7:05 and it's 8:50, that's past the 90 minutes, write it up and send it back.
Water held back at the plant, often printed as trim water or allowable water, is the only water a driver can add without the engineer's say-so.
Also heard as
- ticket
- delivery ticket
- load ticket
Related terms
Mix design
The recipe for a concrete mix: the weights of cement, SCMs, water, aggregates and admixtures per cubic yard.
Hot load
A truckload of concrete that is setting faster than it should, from heat, delay or leftover concrete in the drum.
Drum
The rotating mixing barrel on a ready-mix truck, turning one way to mix and the other to discharge.
w/cm
Water-to-cementitious-materials ratio: the weight of mix water divided by the weight of cement plus SCMs.
Yard
One cubic yard of concrete, 27 cubic feet, the unit used for every US ready-mix order and invoice.