AG Mechanics CDE Practice Exam 2026 – The Comprehensive All-in-One Guide for Success

The primary difference between mortar and concrete is that concrete contains gravel, whereas mortar does not. Mortar is a mixture of water, cement, and fine aggregate such as sand, used to bind building blocks together, while concrete is a composite material composed of coarse aggregate (such as gravel), fine aggregate, cement, and water for construction projects like slabs and walls. The presence of gravel in concrete provides strength and durability, making it suitable for load-bearing structures.