ALKALİ İLE AKTİVE EDİLMİŞ ÖĞÜTÜLMÜŞ DİATOMİTLİ HARÇLARIN DAYANIM ÖZELLİKLERİ

Abstract

In this study, the flexural and compressive strength values of ground diatomite mortars activated with sodium carbonate (Na 2 CO 3 ) were investigated. The crushed limestone with maximum size of 0-5 mm provided from Nigde-Basmakci region was used. The amounts of Na 2 CO 3 used to activate the binder and crushed limestone were kept constant used in the mixtures. In addition to the control mortar control produced by only cement, the mortar specimens using the replacement ratios of 0, 25, 50, 75 and 100% ground diatomite by weight of cement together with Na 2 CO 3 at a constant rate were produced. Moreover, the mortar mixtures using the replacement of 4% titanium dioxide (TiO 2 ) by weight of cement were produced in the same mixture proportions. The dry or wet curing was applied on the produced specimens until the testing day to determine the flexural and compressive strength values. The flexural and compressive strength results of mortars made with ground diatomite and TiO 2 applied the dry and wet curing were compared with the results of control mortars. The experimental results show that the flexural and compressive strength values of ground diatomite mortars activated with Na 2 CO 3 decreases as the amount of ground diatomite used instead of cement increases. Keywords: Diatomite, alkali activator, mortar, flexural strength, compressive strength