ACI Written Test 2024 Study Guide
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ACI Written Test 2024 Study Guide The longest acceptable time for obtaining the first and final portions of a composite sample is 15 minutes. Once all concrete samples arrive at the testing location, they should be combined and remixed using a shovel to achieve uniformity. Testing for temperature, slump, and air content must begin within 5 minutes after obtaining the final portion of the composite sample. Molding strength specimens should start within 15 minutes after creating the ...