ACI Concrete Strength Testing Technician Practice Test

Does the practice of ASTM C1231 provide procedures for testing cylinder specimens until complete failure?

1. Yes

2. No

3. Only initial failure

4. Only visual inspections

The correct answer is: No

The practice outlined in ASTM C1231 is designed specifically for the evaluation and testing of concrete cylinder specimens in a way that reflects their intended use in construction. This standard focuses on methods for transporting, handling, and testing concrete cylinders while protecting their integrity until they are measured for strength. While the standard provides guidance on how to perform the preparation and management of the specimens, it does not include procedures for testing them until complete failure. Instead, it typically encourages testing up to the point of initial failure, at which the maximum load is documented, and real-time analysis of strength is conducted. Understanding this limitation is crucial for technicians, as it ensures that the testing procedures align with the intended final use of the specimens, providing a practical assessment of the concrete's compressive strength without needing to push to complete failure. This approach helps maintain the integrity of the specimens for future evaluations if necessary and ensures compliance with typical industry practices.