Which specification is required for the flexural testing of concrete?

The flexural testing of concrete specifically involves evaluating the material's ability to withstand bending forces, which is effectively conducted through the use of concrete beams. The Concrete Beam Specification outlines the necessary procedures, dimensions, and testing methodologies required to accurately assess the flexural strength of concrete. This testing involves loading the beam until it fails, allowing for the calculation of the material's flexural capacity based on the load applied and the geometry of the beam.

Other specifications such as those for concrete blocks, cylinders, or cores serve different purposes. The Concrete Block Specification typically addresses the standards for block production and characteristics, while the Concrete Cylinder Specification relates to compressive strength testing, which does not involve flexural testing. Additionally, the Concrete Core Specification deals with testing the in-situ quality and strength of concrete structures by extracting cylindrical samples. Each of these options focuses on different aspects of concrete testing and does not encompass the requirements for flexural testing. Thus, the Concrete Beam Specification is the most relevant and essential for assessing the flexural properties of concrete.