Concrete has relatively high compressive strength, but much lower tensile strength. Therefore, it is usually reinforced with materials that are strong in tension (often steel). The elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops.
Concrete exhibits a high compressive strength, but its tensile strength is significantly lower. To compensate for this weakness, it is commonly reinforced with materials that are strong in tension, such as steel. The elasticity of concrete remains relatively constant under low stress levels, but this property diminishes at higher stress levels as matrix cracking occurs.