Effects of a high-calcium and a low-calcium fly ash on the properties of portland cement fly ash pastes and mortars.

Tokyay, Mustafa


Effects of Turkish fly ashes on the portland cement-fly ash systems.
Ramyar, Kambiz; Erdoğan, Turhan Y.; Department of Civil Engineering (1993)
Effect of combining different cement clinkers and slag with controlled finenesses on mortar strength and heat of hydration
Çelikkol Koçak, Tümay; Erdoğan, Sinan Turhan; Department of Civil Engineering (2013)
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...
Comparison of test methods on the compressive strength of fly ash blended cements /
Tunç, Hasan; Yaman, İsmail Özgür; Tokyay, Mustafa; Department of Civil Engineering (2014)
In Turkey the compressive strength of cements are determined according to TS EN 196-1. That standard suggests the use of a constant water-cement ratio of 0.50 in preparation of mortar specimens for all types of cements. On the other hand, in USA cement producers use ASTM C 109 to determine the compressive strength of cements, which is based on a constant consistency of cement mortars for blended cements only. The main difference of these methods is the needed amount of water to produce cement mortar. When a...
The Effect of nanosilica on the properties of pumice incorporated blended cement
Dündar, Burak; Yaman, İsmail Özgür; Şahmaran, Mustafa; Department of Civil Engineering (2016)
Because of the high energy requirement and high CO2 amount as a waste of burned CaCO3 present in raw material, Portland Cement production is also responsible from the CO2 emission among other responsible industries. In order to reduce such an energy consumption, use of portland cement clinker is aimed to be reduced in construction industry. For this aim, use of materials called pozzolan has become widespread. Through the use of pozzolans, the amount of Portland Cement Clinker in structural concrete can be r...
Effect of particle size on heat of hydration of pozzolan incorporated cements /
Ardoğa, Mehmet Kemal; Tokyay, Mustafa; Erdoğan, Sinan Turhan; Department of Civil Engineering (2014)
Hydration reactions, the chemical reactions between cement and water are exothermic. The determination of the heat of hydration and rate of heat evolution of cement are extremely important to understand the hydration mechanism. In this study, clinker and gypsum rock were ground after adding natural pozzolan (trass) with various proportions until a specific fineness value and different cements were obtained. These cements were divided into particle size groups with a sonic sifter and the heat of hydration an...
Citation Formats
M. Tokyay, “Effects of a high-calcium and a low-calcium fly ash on the properties of portland cement fly ash pastes and mortars.,” Ph.D. - Doctoral Program, Middle East Technical University, 1987.