After a 7-day cylinder strength test shows below the minimum specification, what is the recommended CM action?

After a 7-day cylinder strength test shows below the minimum specification, what is the recommended CM action?

• A. Reference the test results in daily reports and wait to receive the 14, 28 and 56 day break results, if necessary; closely monitor design mixes and delivery tickets for compliance with the specified strength for the next placements
• B. Stop Work Immediately and Notify the Owner
• C. Dismiss the GC Team Until Strength Is Met
• D. Increase the Mix Water Content to Reach Strength

Answer: (A)

When early strength results are below specification, the prudent course is to document what happened, keep close records, and continue to monitor the project while awaiting the full set of later strength tests. A 7-day cylinder reading can be an early indicator, but it doesn’t determine final strength. By recording the result in daily reports and watching the 14-, 28-, and 56-day break results, you gather the data needed to assess overall performance and determine whether adjustments are needed for future placements. In the meantime, review current and upcoming mixes, delivery tickets, and curing procedures to ensure future batches have a higher likelihood of meeting the required strength. Stopping work or notifying the owner is unnecessary unless there’s an immediate safety risk or structural concern. Dismissing the GC team isn’t a constructive or standard corrective action. Increasing the water content would actually reduce strength, not improve it, so it’s not a valid corrective measure.

When early strength results are below specification, the prudent course is to document what happened, keep close records, and continue to monitor the project while awaiting the full set of later strength tests. A 7-day cylinder reading can be an early indicator, but it doesn’t determine final strength. By recording the result in daily reports and watching the 14-, 28-, and 56-day break results, you gather the data needed to assess overall performance and determine whether adjustments are needed for future placements. In the meantime, review current and upcoming mixes, delivery tickets, and curing procedures to ensure future batches have a higher likelihood of meeting the required strength.

Stopping work or notifying the owner is unnecessary unless there’s an immediate safety risk or structural concern. Dismissing the GC team isn’t a constructive or standard corrective action. Increasing the water content would actually reduce strength, not improve it, so it’s not a valid corrective measure.