Which of the following describes Structural Lightweight Concrete?

Structural lightweight concrete is characterized by its reduced density compared to normal concrete, making it suitable for specific applications, particularly in deck construction. This type of concrete incorporates lightweight aggregates or admixtures, which result in a material that has a lower overall weight while maintaining adequate strength for structural applications.

When used in deck construction, structural lightweight concrete is beneficial because it reduces the load on supporting structures, which can help with overall design efficiency and reduce the amount of materials needed for support. This is particularly advantageous in multi-story buildings or where weight reduction is critical to the integrity and safety of the structure.

While roofing membranes may incorporate lightweight materials, that context does not define structural lightweight concrete, making the choice less accurate. Heavy reinforcement with steel applies to conventional concrete but does not pertain to the classification of structural lightweight concrete. Thus, the focus on reduced weight and its specific use in deck construction accurately describes what structural lightweight concrete is intended for.