Mahmut DEMIR was graduated from Istanbul Technical University, Istanbul, Turkey as Civil Engineer in 1990. He had his Master’s Degree from Thrace University, Tekirdag, Turkey with a thesis on “Defining Quality Control of Mix Design Optimisation”. He had worked at one of the biggest prefabricated elements company for 5 years as Production Chief and Quality Control Chief. He had also worked in the Akcansa, partner of HeidelbergCement Group, belongs a giant group of Turkey, Sabanci Holding  for 10 years. His positions there were Production Chief, Quality Control Chief, Research and Development Chief. Since 2005, he has been running his construction materials laboratory as a partner. He also has been consulting to some ready mix concrete companies and to some projects. He is also an auditor of Turkish Accreditation Association and he audits third party laboratories. His expertises are; precast and prefabricated concrete technology, ready mix concrete technology, new concrete products, research and development on concrete, concrete floors, concrete repair, setting up concrete plants and managing concrete plant operations. He had also some papers issued in scientific journals and submitted or presented in national and international symposiums and conferences. These papers are listed below:

•6th International Symposium on High Strength / High Performance Concrete – Leipzig, June 2002 : “Mechanical Behaviour of High Strength Concretes with High Volume Fly Ash”, Özkan Şengül, Canan Taşdemir, Mahmut Demir, Mehmet Ali Taşdemir.

•Advances in Civil Engineering Congress 2002 (ACE 2002) - İstanbul, Eylül 2002 : “Effect of Fineness and Amount of Fly Ash on Strength Development of Concrete”, Mahmut Demir, Mehmet Ali Taşdemir. 

•Turkish Ready Mix Concrete Association, Concrete 2004 Congress – İstanbul, June 2004 : “Styropor Lightweight Aggregate Concrete”, Reşat Sönmez, Mahmut Demir, Hakan Ekim.

•Turkish Ready Mix Concrete Association, Technical Bulletin, Vol 51 – June 2002, “Slip-resistant Road Pavements”, Mahmut Demir.

•Turkish Ready Mix Concrete Association, Technical Bulletin, Vol 55 – February 2003, “Effects of Fineness and Content of Fly Ash on Strength Development ofCconcrete and Cement”, Mahmut Demir.

Resat SONMEZ was graduated from Istanbul Technical University, Istanbul, Turkey as Civil Engineer in 1991. He had his post-graduate certificate from Istanbul University, Istanbul, Turkey on “International Management”. He had worked at one of construction chemicals company for 1 year as Sales Engineer. He had also worked in the Akcansa, partner of HeidelbergCement Group, belongs a giant group of Turkey, Sabanci Holding  for 11 years. His positions there were Production Chief, Quality Control Chief, Research and Development Chief. Since 2005, he has been running his construction materials laboratory as a partner. He also has been consulting to some ready mix concrete companies and to some projects. His expertises are; construction chemicals, insulation, concrete technology, new concrete products, research and development on concrete, concrete floors, concrete repair, setting up concrete plants and managing concrete plant operations. He had also some papers issued in scientific journals and submitted or presented in national and international symposiums and conferences. These papers are listed below:

•9th International Corrosion Symposium - Ankara, September 2004 : “Optimum Design of Concrete Against Rapid Chloride Permeabilitiy”, Özkan Şengül, Fikret Bayramov, Mehmet Ali Taşdemir, Reşat Sönmez, Ziya Yüceer.

•European Ready Mix Concrete Association (ERMCO 2004), 14th European Ready Mix Concrete Congress – Helsinki 2004 : “Self Compacting Concrete Reinforced With Steel Fibers for Retrofitting of Existing Structures”, Mehmet Ali Taşdemir, Bushan Karihaloo, Reşat Sönmez.

•Turkish Ready Mix Concrete Association, Concrete 2004 Congress – İstanbul, June 2004 : “Styropor Lightweight Aggregate Concrete”, Reşat Sönmez, Mahmut Demir, Hakan Ekim.

•Turkish Assocation of Engineers and Architects, Chamber of Civil Engineers, 5th National Concrete Congress – İstanbul, October 2003 : “Rapid Chloride Permeability of Normal and High-Strength Concretes Incorporate High Amount of Fly Ash”, Özkan Şengül, Canan Taşdemir, Reşat Sönmez.

•Turkish Assocation of Engineers and Architects, Chamber of Geological Engineers, 3rd National Crushed Stone Symposium, İstanbul, December 2003 : “Effect of Aggregate Type on the Freze-Thaw Durability of Concrete”, Özkan Şengül, Canan Taşdemir, Şevket Koruç, Reşat Sönmez.

•9th International Symposium on Concrete Roads – İstanbul, Nisan 2003 : “Some Physical Properties of Roller Compacted Concretes Used in Road Pavement Applications”, Reşat Sönmez, Canan Taşdemir, Ziya Yüceer, Mehmet Ali Taşdemir.

•Turkish Assocation of Engineers and Architects, Chamber of Architects, 1st National Construction Materials Congress – İstanbul, October 2002 : “Load-bearing Properties of Lightweight Concretes”, Nilüfer Özyurt, Hakan Konuk, Canan Taşdemir, Ziya Yüceer, Reşat Sönmez.

•Fib Symposium on Concrete and Environment – Berlin, October 2001 : “Effects on Curing Conditions on Strength and Permeability Properties of Concretes with Various Fly Ash Content”, Canan Taşdemir, Reşat Sönmez, Mehmet Ali Taşdemir.