Why should concrete be tested before placing on site?

Testing concrete before placing it on site is essential to ensure that it meets the specified performance requirements. This includes evaluating its strength, durability, workability, and other properties that are critical for the intended use of the concrete. By confirming that the concrete meets these standards, you can prevent potential issues that could affect the safety and longevity of the structure.

Performance requirements are typically outlined in project specifications and include factors like compressive strength, slump, air content, and resistance to freeze-thaw cycles, among others. Testing allows for adjustments to the mix design if necessary, ensuring the concrete will perform adequately under the expected conditions.

While factors such as color consistency, drying time, and aggregate size are important considerations in specific situations, they do not directly address the critical performance-related aspects that testing aims to fulfill. Thus, the primary goal of concrete testing is to verify compliance with the designated performance criteria essential for structural integrity and serviceability.