A Water-Addition Record Is Not Permission to Change a Concrete Mix
When ready-mixed concrete is part of a project, a delivery record can help explain what was supplied and what changes were authorized. It should not become a field recipe or a reason to add water by feel. Product and specification requirements govern the actual decision.
Identify which material is involved
Distinguish ready-mixed concrete from bagged repair products or a multi-component system. Instructions for one do not transfer automatically to another. NRMCA’s jobsite-water guidance addresses ready-mixed concrete and describes limits linked to the specified mixture. A crew should not borrow that discussion to alter a proprietary repair material.
Keep authorization with the event
Where an addition is permitted and directed under the applicable requirements, retain the delivery reference, relevant quantity record and responsible authorization through the established project process. Do not replace those records with a vague note that the mix was adjusted. A supplier or responsible technical party should resolve uncertainty before an improvised adjustment changes the material.
Preserve the downstream context
Keep the material record with placement and curing information so later reviewers can understand which work it concerns. An entry proves only what the record actually establishes; it is not a general certificate of compliance or future performance. The practical goal is a traceable decision, without encouraging unreviewed changes, copying another crew’s recipe or promising that extra water has no consequence.
Copyable worksheet
Use one row for each field. Mark unknown information clearly and retain the original records.
| Field | Your note |
|---|---|
| Material type and specification | ____________________ |
| Delivery or batch reference | ____________________ |
| Applicable instruction | ____________________ |
| Authorized change and record | ____________________ |
| Placement area linked to record | ____________________ |
Worked example
Illustrative example: a fictional crew receives a request to make concrete easier to place. The lead refers the question to the responsible supplier and project requirements, retaining any authorized adjustment record. The same approach is not assumed valid for a separate bagged repair product.