Effect of combining different cement clinkers and slag with controlled finenesses on mortar strength and heat of hydration

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, İnşaat Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2013

Öğrenci: TÜMAY ÇELİKKOL KOÇAK

Danışman: SİNAN TURHAN ERDOĞAN

Özet:

Portland cement production is an energy consuming activity. Increasing efficiency in concrete production is one of the ways of reducing energy consumption. To improve the efficiency of the properties of both materials and concrete system, reduction of undesired effects (loss of strength, decrease in lifetime, etc.) is important. The main purpose of this study is to combine different Portland cement clinkers and blast furnace slag with different fineness to obtain a cement with a controlled grading, in order to investigate their effects on properties of concrete. For this purpose three different Portland cements, and a blast furnace slag, each ground to three finenesses, are used. Strength and hydration heat development of these combinations are measured. Isothermal calorimetry is used to measure heat of hydration. Results obtained are used to determine relationships between controlled gradation, strength, fineness and composition of the cements. According to this study, the individual strength of clinkers is the main factor affecting strength development mixtures containing fine blast furnace slag and mixtures containing clinkers only. Meanwhile, activation of blast furnace slag is the main factor affecting strength development for mixtures containing medium blast furnace slag.