Akademik Veri Yönetim Sistemi
13th International Congress on Advances In Civil Engineering, İzmir, Türkiye, 12 - 14 Eylül 2018, ss.87-88, (Tam Metin Bildiri)
Application and scheduling of various critical processes like formwork removal, post – tensioning, ending protection against cold temperatures, opening a road to traffic, transportation of prefabricated elements during concrete construction usually require a reasonable strength prediction of concrete. Maturity method a means of estimating the combined effect of time and temperature during the curing process on the development of concrete properties can be used for this purpose. Several methods were developed to predict concrete strength in relation to its age and curing temperature. Among these, the maturity and equivalent age functions have become the standard practice since 1974 in ASTM C 1074 (Estimating Concrete Strength by Maturity Method). The former function requires the determination of a datum temperature whereas the latter requires the determination of the activation energy. ASTM C 1074 offers three alternative methods for determining the datum temperature or activation energy. The prime interest of this study is to be critically compared of the methods by an experimental investigation on standard mortars prepared by using CEM I 42.5. Strength specimens were prepared according to EN 196 – 1 and continuously moist – cured at 5⁰C, 20⁰C, and 40⁰C for 2, 7, 14, 28, and 90 days of age.