Mr. Erion Luga was awarded the PhD degree

February 27th, 2015

On February 11th, 2015, Mr. Erion Luga, lecturer in the department of Civil Engineering, successfully defended his PhD thesis in front of the jury of 5 professors and several other lecturers, master and phd students of the Erciyes University Civil Engineering department. His study ”Properties of fly ash and blast furnace slag geopolymer mortars” was the first research in civil engineering to introduce the Combined Design Method to the area. After the defense, he was awarded the degree of doctorate in Civil Engineering, by the Graduate School of Natural and Applied Sciences of the Erciyes University.

We wish Dr. Luga success in his future aspirations.



Below you may find some details related to his research:


Author: Erion LUGA

From: Erciyes University, Graduate School of Natural and Applied Sciences

Thesis Supervisor:  Prof. Dr. Cengiz Duran ATİŞ 



The aim of this study is to optimize the mortars made of blast furnace slag and fly ash blend activated with sodium hydroxide, and the measurement of the properties of the resulting optimum mortars. For this purpose, by making advantage of "Combined Design Method" and with the help of Design Expert 8 package program it was possible to identify the best mix proportions and production conditions related to the flow workability of fresh mixes, flexural and compressive strength of the mortars cured in diffrent temperature levels between 50-100°C. The model analysis results demonstrated the applicability of the regresion model in the set of values of the variables included. After reaching the optimum values several tests were made on the selected samples and two different control mixes produced from OPC 42.5 and OPC 52.5. The unit weight, water absorption, porosity, flexural and compressive strength, capillary water absorption, abrasion resistance, resistance to high temperature, shrinkage, freeze-thaw resistance, resistance to wetting-drying cycles, HCl acid effect, H2SO4 acid effect, alkaline environment effect and SEM analysis of the samples were examined. The result were compared with the control mixes. As a result, compressive strength, abrasion resistance, resistance to high temperature, shrinkage, resistance to wetting-drying cycles and resistance to H2SO4 acid effect of the geopolymer mortars was found to be better than those of the control specimens. Whereas the freezing-thawing resistance, resistance to HCl acid and alkaline environment effects were observed to be weaker compared to the control samples.