Masonry cement is primarily used for which of the following applications?

Masonry cement is primarily used for stucco finishes due to its specific composition and properties that make it well-suited for this application. Stucco, which is commonly used to create a decorative and protective exterior finish on buildings, requires a material that can provide good adhesion and flexibility while maintaining durability.

Masonry cement is designed to have less water permeability than regular Portland cement, which helps it to withstand external weather conditions better and adhere to various substrates used in stucco applications. The mix typically includes additives to enhance its workability and bonding capabilities, making it ideal for creating smooth and aesthetically pleasing finishes on walls.

In contrast, high-rise construction generally relies on concrete and structural systems that require much stronger materials than what masonry cement can provide. Structural beams, on the other hand, need to support significant loads, which is beyond the focus of masonry cement's intended use. Sidewalks are typically built with concrete for its compressive strength and durability, further distancing it from masonry cement applications. Therefore, the association of masonry cement with stucco finishes highlights its specialized role in construction and finishing work.