Once set, concrete forms a structurally sound object that resists breakage. The hardened combination of cement, rock (or sand), and water results in a strong, solid structure that won’t wilt or sag under the weight of books, lamps, or even heavier items. Larger interior concrete pieces, such as countertops or furniture, incorporate steel mesh or bars to add the tensile strength necessary to reduce the risk of cracking while supporting the weight of kitchen appliances, decorative accessories, or even people. The larger the project, typically, the more steel reinforcement is necessary to maximize the material's strength. For exceptional strength, choose a concrete mix product that incorporates fibers, which fortify this already robust material.