Estimate the tensile strength required to prevent cracking in a concretelike material that is cast into a bar, 1.25 m long, and is fully restrained ateach end against axial movement. The concrete is initially cast and curedat a temperature of 40°C and subsequently cools to a temperature of –20°C.Assume that the modulus of elasticity is 35 GPa and the thermal coefficient is9 X 10-6m/m/°C.

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Crack Detection

Concrete materials are meant for supporting structures, building foundations and they act as several load-bearing structures. Over time, due to environmental conditions, and based on the constituent materials used, concrete materials are subjected to a great degree of distress. Corrosion of the reinforcement bars due to chemical influences, uneven base, earthquake, drying shrinkages, and alkali-aggregate reactions are some of the reasons for concrete distress.