Modelling of temperature and shrinkage induced cracking risks in young concrete [Elektronisk resurs]

• Control of thermal and shrinkage cracking in hardening concrete is of great importance to ensure desired service life and function of concrete constructions. Making reliable stress estimations, and thereby conclusions about cracking risks caused by temperature movements and shrinkage involves advanced modelling of material properties and structural restraint. Cracking of concrete during the hardening phase must be avoided in order to minimize the risk of durability problems in the future, such as corrosion risk of the reinforcement, water tightness and damages according to frost. Estimation of the risk of early age cracking requires knowledge of the combined effects from temperature development and mechanical behaviour during the hydration. Applications of the present model using the computer program ConTeSt Pro demonstrates that it can be used to decide what measures to be taken to minimize the risk of cracking during the hardening phase for concrete structures. One example of estimated temperatures and cracking risks is shown in Figure 1.Figure 1 Estimated temperatures and cracking risks for the walls of the concrete arch of the Svinesund bridge between Sweden and Norway. The arch was built by the technique of climbing form work 

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Engineering and Technology  (hsv)

Civil Engineering  (hsv)

Infrastructure Engineering  (hsv)

Teknik och teknologier  (hsv)

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Infrastrukturteknik  (hsv)

Structural Engineering  (ltu)

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