To carefully evaluate the effective prestress losses during and after concrete casting and hardening, to monitor the camber growth, and to evaluate the effect of temperature variation during concrete hardening in wing-shaped mem- bers, an experimental program on full-scale pretensioned specimens has recently been completed. The structural be- havior of the prestressed concrete elements was investigat- ed at various stages of their early life. Attention was also placed on the use of self-consolidating concrete (SCC).
In fact, while most of the properties of hardened SCC are comparable with those of conventional concrete, the modu- lus of elasticity at release Ecj, which plays an important role in the evaluation of prestress losses, has been found to be less than that of conventional concrete mixtures with comparable compressive strength of concrete at release fcj.12
To carefully evaluate the effective prestress losses during and after concrete casting and hardening, to monitor the camber growth, and to evaluate the effect of temperature variation during concrete hardening in wing-shaped mem- bers, an experimental program on full-scale pretensioned specimens has recently been completed. The structural be- havior of the prestressed concrete elements was investigat- ed at various stages of their early life. Attention was also placed on the use of self-consolidating concrete (SCC).In fact, while most of the properties of hardened SCC are comparable with those of conventional concrete, the modu- lus of elasticity at release Ecj, which plays an important role in the evaluation of prestress losses, has been found to be less than that of conventional concrete mixtures with comparable compressive strength of concrete at release fcj.12
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