Design in accordance with FP and specified ACI standards found in the contract.
Admixtures: Admixtures must be compatible and of the same type as those used in the mixtures from which strength data were obtained.
Accelerators: Do not use chloride accelerators. Do not use set accelerating admixtures with Class P (Prestressed Concrete).
Test age: The test results must be less than 12 months old from date of submittal.
Test: A test result consists of a minimum of three 4x8 cylinders tested or a minimum of two 6x12 cylinders tested from a load of concrete sampled according to ASTM C172.
Test group: A group of test results must be from a single project without a break in production of more than 3 months and groups shall not consist of fewer than 10 tests.
| Question | Answer |
|---|---|
| Form Name | Form FHWA 1608 |
| Form Length | 6 pages |
| Fillable? | Yes |
| Fillable fields | 584 |
| Avg. time to fill out | 60+ min |
| Edition | Rev 02-2025 |
| Issuing agency | Federal Highway Administration, Federal Lands Highway Office |
| Other names | FHWA 1608, Form FHWA 1608, 1608, 552 concrete mix design submittal, concrete submittal, structural concrete mix design submittal |
| Official source | Form FHWA 1608 (Rev 02-2025), Federal Highway Administration, Federal Lands Highway Office |
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