The tensile properties of cement and concrete are critical indicators of their ability to resist cracking under stress. Unlike compressive strength, which is typically higher and more commonly measured, tensile strength is the capacity of concrete to withstand loads that tend to pull it apart. Cement and concrete inherently possess lower tensile strength, which is why they are often reinforced with materials like steel. The tensile properties of concrete are influenced by its composition (cement type, water-to-cement ratio, aggregate type, and size), curing conditions, and the presence of any admixtures or reinforcements. Under severe environmental conditions such as extreme temperatures, freeze–thaw cycles, and chemical exposure, the microstructure of concrete can alter, affecting its tensile strength. The formation of microcracks due to thermal expansion and contraction or chemical degradation processes such as alkali–silica reaction (ASR) can further weaken the tensile strength (Mindess and Young 1981).

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Tensile Properties

摘要

The tensile properties of cement and concrete are critical indicators of their ability to resist cracking under stress. Unlike compressive strength, which is typically higher and more commonly measured, tensile strength is the capacity of concrete to withstand loads that tend to pull it apart. Cement and concrete inherently possess lower tensile strength, which is why they are often reinforced with materials like steel. The tensile properties of concrete are influenced by its composition (cement type, water-to-cement ratio, aggregate type, and size), curing conditions, and the presence of any admixtures or reinforcements. Under severe environmental conditions such as extreme temperatures, freeze–thaw cycles, and chemical exposure, the microstructure of concrete can alter, affecting its tensile strength. The formation of microcracks due to thermal expansion and contraction or chemical degradation processes such as alkali–silica reaction (ASR) can further weaken the tensile strength (Mindess and Young 1981).