SkillsUSA Carpentry Practice Test 2026 - Free Carpentry Practice Questions and Study Guide

Concrete is the material formed when Portland cement, fine and coarse aggregates, water, and admixtures are mixed. The cement acts as the binder that hardens and glues the aggregates together as it hydrates. Water starts the chemical reactions and provides the paste that coats the particles, giving the mix its workability when fresh and its strength when cured. The aggregates supply bulk and strength while reducing shrinkage, and admixtures tailor properties like flow, setting time, durability, and resistance to environmental conditions. Admixtures alone are just additives, ready-mixed refers to the production/delivery method, and footing is a foundation element, not the material itself. Therefore, the described mixture is concrete.