The concrete submittal form is a required document for federally funded highway and land construction projects. It is mandated by the U.S. Department of Transportation Federal Highway Administration Federal Lands Highway Office. The form is officially called FHWA Form 1608 and is also known as the 552 Structural Concrete Mix Design Submittal.
The form captures basic project information first. This includes the project name, location, and submission date. It also lists the prime contractor, subcontractor, and the reviewing engineer. The concrete class and exposure class are designated here as well. These determine the required mix proportions and compressive strength criteria.
The mix proportions section lists every material in the batch. Cementitious materials such as Portland cement and fly ash are each recorded with their specific gravity and volume per cubic yard. Water content and the water-to-cementitious materials ratio are calculated in this section. A lower ratio generally produces stronger and more durable concrete.
Chemical admixtures are listed by type and dosage. Air-entraining agents, water reducers, set retarders, and accelerators are all common in federal highway mixes. Each admixture requires a separate certification document attached to the submittal.
The fresh concrete section records expected slump, air content, and theoretical unit weight. These values confirm the mix will be workable under field conditions. The hardened concrete section lists target compressive strengths at 7, 28, and 56 days. Test cylinders are cast and broken at each interval to verify compliance.
Aggregate properties occupy the final section of the form. Fine and coarse aggregates are each listed with sieve analysis data following AASHTO T 27 procedures. Gradation must fall within the specification limits. Clay lumps, friable particles, and abrasion resistance values are also required for each aggregate source.
For additional construction documentation, see the Concrete Checklist Form and the Construction Site Inspection Form.
| Question | Answer |
|---|---|
| Form Name | Concrete Submittal Form |
| Form Length | 5 pages |
| Fillable? | No |
| Fillable fields | 0 |
| Avg. time to fill out | 1 min 15 sec |
| Other names | aashto iia 240 get, fhwa form 1608, 1608 aashto online, structural concrete mix |