Abstract:

The purpose of this study; To determine the physical and mechanical changes that occur as a result of carbonation in concrete produced by substituting different amounts of MT waste. Crushed stone aggregate, CEM I 42.5 R cement, water, superplasticizer, marble powder and silica fume were used during the study process. 5%, 10%, 15% marble dust (MT) substituted, 10% silica fume (SD) substituted, 5% MT + 10% SD, 10% MT + 10% SD, 15% MT + 10% SD substituted and reference Eight types of C30 class concrete (without additives) with the same slump value were produced. For each additive ratio, three prismatic samples of 100x100x400 mm and six cube samples of 100x100x100 mm were prepared. Water cure was applied to prismatic concretes for 28 days. 28. Examples of curved concrete removed from the day pool were kept in the carbonatization tank for 56 days.  The inclination resistance was performed on the samples extracted from the tank and the carbonatization depth was measured. Beton samples are brought to the sizes of 100x100x100 mm, and on them are carved water absorption and ultrasound transition speed measurements. Pressure resistance tests were performed on 3 samples, and the other 3 samples were performed with pressure resistance tests. Carbonization on unapplicated concrete has been carried out water absorption, ultrasound transition speed, pressure resistance and stretching resistance experiments. Other examples are compared with the examples exposed to carbonatization. As a result, as the carbonatization depth increases in concrete samples containing MT, SD and MT + SD in different proportions, the ultrasound speed values are increased, the capillary rates are reduced, the amount of coating is reduced, and the pressure resistance is increased.