Mustafa Tokyay

E-mail

mtokyay@metu.edu.tr

Department

Department of Civil Engineering

Scopus Author ID

55606976000

Long-term mechanical performance of fly ash-incorporated reactive magnesia cements Ardoga, Mehmet Kemal; Yaman, İsmail Özgür; Tokyay, Mustafa (2024-09-20) In this research, after producing reactive magnesia directly from calcination of magnesite, reactive magnesia specimens with fly ash were prepared and cured in two different environments to investigate their long-term mech...
Determining datum temperature and apparent activation energy: an approach for mineral admixtures incorporated cementitious systems Atasever, Muhammet; Tokyay, Mustafa (2024-01-01) The maturity method is used to predict the strength of concrete by monitoring its temperature history. Accuracy of maturity method relies on the dependable determination of the datum temperature and the apparent activation...
Effect of particle size on early heat evolution of interground natural pozzolan blended cements Ardoğa, Mehmet Kemal; Erdoğan, Sinan Turhan; Tokyay, Mustafa (2019-05-10) Natural pozzolans are increasingly being used in blended cements due to their compositional uniformity and local abundance in some countries. They influence hydration, both at early and late ages. A control portland cement...
Extension of the chemical index model for estimating Alkali-Silica reaction mitigation efficiency to slags and natural pozzolans Mahyar, Mandi; Erdoğan, Sinan Turhan; Tokyay, Mustafa (2018-08-10) Supplementary cementitious materials (SCMs) can mitigate alkali silica reaction (ASR) but the level of cement replacement required is difficult to estimate for a particular SCM. The Chemical Index Model was recently propos...
Mechanical Properties of Cement Mortar Containing Heat-Treated Boron Derivative Waste at Elevated Temperatures KAMAN, DERYA ÖVER; Koroglu, Levent; AYAS, ERHAN; Tokyay, Mustafa; GÜNEY, Yücel (2018-06-01) The largest boron reserves in the world are located in Turkey. The production of boron compounds and use of generated boron derivative waste during this production are extremely important for both economically and environm...
Hydration of alinite cement produced from soda waste sludge Ucal, Gultekin Ozan; Mahyar, Mandi; Tokyay, Mustafa (2018-03-10) Alinite cement is an alternative inorganic, low-energy binding material. This experimental study investigated hydration characteristics of alinite cement which was produced by using soda waste sludge as a raw material. Pas...
Low-energy alinite cement from soda sludge waste Uçal, Gultekin O.; Mahyar, Mahdi; Tokyay, Mustafa; Yaman, İsmail Özgür (2017-01-01) Alinite cement which was developed in 1970s is an alternative inorganic, low-energy binding material in which chlorine containing wastes can be utilized. Although potentially a suitable candidate, there is little research ...
Effect of particle size and slag content on the early hydration of interground blended cements Cetin, Can; Erdoğan, Sinan Turhan; Tokyay, Mustafa (2016-03-01) Three blended cements prepared by intergrinding 6-35% slag with clinker and gypsum, and a control portland cement, were sieved to yield 0-10 mu m, 10-30 mu m, 30-50 mu m, and >50 mu m subgroups. Clinker/slag/gypsum content...
Cement production by cement-bonded wood particleboard wastes Yilmaz, Mustafa; Tokyay, Mustafa; Yaman, İsmail Özgür (2016-01-01) To improve the sustainability of cement and concrete production, there is an increasing trend towards using industrial wastes throughout their production processes. The aim is to find new resources that can be used in any ...
Effect of Pozzolan Content and Fineness on Early Hydration of Interground Blended Cements Erdoğan, Sinan Turhan; Tokyay, Mustafa (2014-03-01) The chemical composition and heat evolution of <45 mu m (fine), and > 45 mu m ( coarse) portions of interground, natural pozzolan-blended cements were investigated. Cements with four different pozzolan contents were ground...

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