ÇÝMENTONUN HÝDRATASYON ISISININ ÖLÇÜMÜNDE KULLLANILAN YÖNTEMLERÝN KARÞILAÞTIRILMASI

TS 687’de verilen Beckman Termometresi ve Isotermal olan ToniCAL kalorimetresi yöntemleri kullanýlarak ayný tip çimentonun hidratasyon ýsýlarý bulunmuþtur. Çimentonun Hidratasyon ýsýsýnýn belirlenmesinde, ýsýnýn kesintisiz saptanmasý ve hesaplamalar otomatik olarak yapýldýðýndan kullanýmý kolaydýr. Bu yöntemi sabit ýsýdaki hidratasyonun incelenmesinin söz konusu olduðu hallerde çimentonun hidratasyon ýsýsýnýn bulunmasýnda çok yararlý bir yöntemdir. ToniCAL Kalorimetresinde, çimento ile su arasýndaki reaksiyon izlenmektedir. Kalorimetre yönteminde hidratasyon ýsýsýnýn deðiþimi de gözlemlenebilmektedir. Bu çalýþmada her iki yöntemle de bulunan hidratasyon ýsýlarýnda büyük farklýlýklarýn görülmediði ortaya konulmuþtur.

COMPARISION OF MEASUREMENT METHODS FOR DETERMINING THE HEAT OF HYDRATION OF CEMENT

In this study, hydration heat values of same type cements are determined using two different methods. These methods are Beckman Thermometer method, which is stated at TS 687 standard, and ToniCAL Calorimeter method. Usage of ToniCAL calorimeter is easier. It can be calculated automatickly. While determining hydration heat of cement, using ToniCAL calorimeter is more advantageous because of uninterrupted determination of heat. It is a very useful method for determination of hydration heat of cement, when it is to study hydration at fixed heat. ToniCAL calorimeter method is more realistic than Beckman Thermometer method. In ToniCAL calorimeter method, the reaction between cement and water is observed. Period of experiment is very short and process is very easy. Also, time saving is another is superiority of ToniCAL instrument. Change of hydration heat can be observed in calorimeter method. At the end of the study, it is not observed that so many differences of the hydration heats, which are determined using both methods.