Which requirement is tied to early-stage strength verification?

• A. Concrete Salt Exposure
• B. Compressive Strength Comparison
• C. Bar Support Marking
• D. Supporting Material Condition

Answer: (B)

Early-stage strength verification is about confirming the concrete has reached the required strength early enough to proceed with construction steps. The direct way to do this is by testing standard cylinders to determine their compressive strength at an early age, then comparing those results to the target strength specified for the project. This comparison shows whether the concrete is on track and can safely advance to next steps, such as form removal or opening to service. Other aspects like salt exposure, bar support marking, or the condition of supporting materials affect durability, placement, or readiness in other ways, but they don’t provide the direct check of meeting the early strength target. So the requirement is tied to comparing compressive strength to the required early strength.