In Louisiana, what is the definition of fine aggregate for Portland cement concrete?

The definition of fine aggregate for Portland cement concrete is specifically recognized as sand. Fine aggregates typically consist of particles that pass through a 4.75 mm sieve and contribute to the workability, strength, and overall stability of the concrete mix. Sand fulfills these requirements by providing a uniform and smooth texture that facilitates the binding of the cement and water.

In this context, other materials such as gravel, crushed stone, and crushed brick serve different functions in concrete mixtures. Gravel and crushed stone are generally classified as coarse aggregates, which are larger in size and contribute to the bulk and structural integrity of the concrete. Crushed brick, while it can sometimes be used as a lightweight aggregate or in specific applications, does not fit the conventional definition of fine aggregate when it comes to standard concrete mixes. Therefore, sand is the correct answer, as it is a fundamental component of fine aggregate in Portland cement concrete.