Effects of Freezing Thaw in Concretes Produced with Different Cements

Paper by TOLA from ISCR 9th 2004 Instanbul Turkey

Serviceability of the concretes that undergo such effects of repetition of freezing-thaw is greatly affected by water-cement ratio, permeability, composition of the cement and mineral additves. Water-cement ratio being between 0.40-0.50, the concrete having a structure without any voids, using a cement with mineral additives, increase the resistance of the concrete against freezing-thaw. Ýn this study, effects of freezing-thaw has been examinated in concretes produced by such cements as Portland cement, puzzolan cement, compozit cement, cement with blustfurnace slag and silica fume cement. Ýn the current study, focus was given on the propertries of chemical compounds in different concretes. Concretes produced with different cements where divided into different groups and control samples to determine the effects of freezing-thaw. Same of the samples where exposed to the effect of freezing-thaw with ntervals of 24 hours with 24 repetition. Of the results of experiment, change in compressive strenght, visual durability index (mesuring of the deterioration in the samples), factor of weight change in modulus of dynamic elasticity were determined. Results were compared with control samples and strength of the cements with different compositions in repetad freezing-thaw experiments. According to the results obtained, it was observed that modern cements show good performance against freezing-thaw

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