I.          International Articles (SCI):

·         

·           Özkan, Ö., “Heat effects on cements producing with GBFS and SS as additives”, Journal of Materials Science, 41 (21), 7130-7140, 2006.

·          Yüksel, İ., Özkan, Ö., Bilir, T., ., “Usage of Granulated Blast-Furnace Slag As Fine Aggregate in Concrete”,  ACI Materials Journal, 103(3), 203-208, 2006.

·           Özkan, Ö., “Properties of Composite Portland Cement Produced With Steel and Blast Furnace Slags”, Technical Journal, 17(3), 3893-3902, 2006.

·           Özkan, Ö., Yüksel, İ., Muratoğlu, Ö., “Strength Properties of Concrete Incorporating Coal Bottom Ash and Granulated Blast Furnace Slag”, Waste Management Journal, 27(2), 161-167, 2007.

·           Yüksel, İ., Bilir, T., Özkan, Ö., “Durability of Concrete Incorporating Non-Ground Blast Furnace Slag and Bottom Ash as Fine Aggregate”,  Building and Env., 42 (7), 2651-2659, 2007.

·           Kanıt, R., Özkan, Ö., Gündüz, M., “Cost Assessment Of Concrete And Steel Types For Office Buildings: An Exploratory Study”, Building and Env., 42 (9), 3404-3409, 2007.

·           Kanıt, R., Gündüz, M., Özkan, Ö., "Cost effect of earthquake region and soil type for office buildings in Turkey". Building and Env., Cilt: 42 (10), 3616-3620, 2007.

·          Özkan, Ö., Yüksel, İ., “Studies on Concrete Containing Waste Bottle Glass and Industrial By-Products” Construction and Building Material, 22(6), 1288-1298, 2008.

·          Kanıt, R., Özkan, Ö., Gündüz, M., “Effect of Project Size and Resource Constraints on Project Duration Through Priority Rule-Based Heuristics”, AI Review Journal (article in press).

·          Kanıt, R., Gündüz, M., Özkan, Ö.,  “Investigating the Effectiveness of Certain Priority Rules on Resource Scheduling of Housing Estate Projects”,  ASCE Journal of Construction Engineering and Management , (accepted for publication).

    Özkan, F., Özkan, Ö., Gündüz, M., "Causal Relatıonshıp Between Constructıon Investment Polıcy And Economıc Growth In Turkey", Journal of Policy Modeling (in review).

·          Özkan, Ö., “A Study on Composite Portland Cement with Addition of Slag from Steelworks and Blast Furnace”, Cement and Concrete Composites, (in review).

·           Yüksel, İ., Özkan, Ö., Siddique, R. “Properties of Concretes Made With Blast-Furnace Slag and Coal Bottom Ash As Fine Aggregate Replacement Subjected to Elevated Temperatures up To 800 ⁰C”, Cement and Concrete Composites, (in review).

·           Özkan, Ö., Yüksel, İ., “Strength of Composite Cement Including Blast Furnace and Steel Slags With Different Fineness”, Adv. Cement, (in review).

·           Yüksel, İ., Özkan, Ö., “Durability of  Composite Cement Including Blast Furnace and Steel Slags with Different Fineness”, Cement and Concrete Research, (in review).

II.          International Articles (EI):

·         

·           Yüksel, İ., Özkan, Ö., Bilir, T., “Production of Briquette with Bottom Ash” Journal of The Faculty of Engineering and Architecture of Gazi University, 21 (3), 527-532, 2006.

·           Özkan, Ö., “Properties of Mortars Containing Waste Bottle Glass And Blast Fırnace Slag”, Journal of The Faculty of Engineering and Architecture of Gazi University, 22(1), 87-94, 2007.

·           Özkan, Ö., “Sulfate Resistance of Cements with Granulated Blast Furnace And Steel Slag Additives”, Journal of The Faculty of Engineering and Architecture of Gazi University, 23(1), 1-8, 2008.

III.          National Articles:

·           Özkan, Ö., “The Effect Of Sea Sand On The Concrete Endurance Strength”, Technology, 1-2, 31-39, 2001(in Turkish).

·          Yüksel, İ., Özkan, Ö., “An Investigation About Concrete Quality İn Western Black Sea Region”, Hazır Beton Dergisi, Yıl 8, sayı 48, ss. 52-55, 2001(in Turkish).

·           Özkan Ö., “The Effect Of Sea Sand On The Concrete Endurance Strength”, Journal of Engineering Sciences, 9 (1), 73, 78, 2003 (in Turkish).

·           Özkan, Ö., “The Influence Of Concrete Classes On Buıldıng Costs”, Teknoloji Dergisi , 7 (1), 171-179, 2004 (in Turkish).

·           Özkan Ö., Muratoğlu, Ö., “The Effect Of Varıous Earthquake Acceleratıons On The Structure Horızontal Forces” 7 (3), 497-506, 2004 (in Turkish).

·           Kanıt R., Özkan, Ö., Erdal, M., “Examination of the Performances of Priority Rules in Construction Investments”, Journal of Polytechnic, 8 (1), 101-109, 2005 (in Turkish).

·           Dorum, A., Özkan, Ö., Erdal, M., “Project Programming by A Heuristic Algorithm Under Limited Resource in The Construction Investments”, Selçuk Technical Online, 4 (2), 73-95, 2006.

·          Dorum, A., Özkan, Ö., Erdal, M., “Effects Of Dıfferent Earth Quake Areas And Dıfferent Soıl Classes On Basıc Structure Costs”, Selçuk Technical Online, Cilt 5, sayı 1, sayfa 1-9, 2006 (in Turkish).

·           Özkan, Ö., Erdal, M., Baykan, U.N., “Performances Of The Prıorıty Rules In Constructıon Project Plannıng”, Selçuk Technical Online, 5 (1), 10-18, 2006 (in Turkish).

IV.          International Conference Proceedings:

·           Kanıt R., Özkan, Ö.,Erdal, M., “Resource constrained Project Scheduling in Road Project”, II. International Traffic and Road Safety Congress and Exhibition, Ankara, 5-7 May 2004.

·           Yüksel, İ., Özcan, A., Özkan, Ö., “Hıgh Temperature Resıstance of Concrete Incorporatıng Fibers and Industrıal Wastes”, 7 th International Fracture Conference Proceedings, Kasım, 2005, Kocaeli.

·          Özkan, Ö., “The Influence of Concrete And Steel Classes on Building Costs”, I. International Vocational and Rechnical Education Technologies Congress”, İstanbul,  Eylül 2005.

·          Özkan, Ö., Yüksel, İ., “An Experimental Study About the Sulfate Resistance of Composite Portland Cements Containing Steel Slag and Granulated Blast-Furnace Slag”, Concrete Technology, Concrete: Constructıon’s Sustaınable Optıon Vol. 1, 191-200, 21-23 May, İstanbul, Turkiye.

·          Özkan, Ö., Yüksel, İ.,  “Evaluation of Optimum Ratio in Production of Composite Portland Cement Incorporating Blast Furnace Slag and Steel Slag” 3rd International Symposium
Sustainability in Cement and Concrete, 8-10 July 2008, Dundee, Scotland.

·           Yüksel, I., Siddique, R.,  Özkan, Ö., Khatib, J., “Effect Of GBFS And GSS On The Properties Of Mortar”, International Conference-Excellence in Concrete Construction- Through Innovation 9 - 10 September 2008, Kingston University- London.

V.          National Conference Proceedings (in Turkish):

·           Özkan, Ö., “Bayındırlık İşleri Genel Şartnamesinin Uygulanmasında Yaşanan İhtilaflı Maddelerin FIDIC Tip Sözleşme İle Karşılaştırılması”, XVI. Türkiye İnşaat Müh. Teknik Kongresi, Teknik Notlar Kitabı, Ankara, 2001.

·           Yüksel, İ., Özkan, Ö., “Ereğli Demir Çelik Fabrikaları Yüksek Fırın Cürufunun Beton Agregası Olarak Kullanımı”, ODTÜ Proje Pazarı, ss. 121-123, 2002, Ankara.

·           Yüksel, İ., Özkan, Ö., Bilir, T., “Granüle Yüksek Fırın Cürufunun  Betonda İnce Agrega Olarak Kullanımı”, V. Beton Kongresi, İstanbul, 1-3 Ekim, 471-482, 2003.

·           Özkan, Ö., “The Influence Of Concrete Classes On Building Costs”, Congress of National Ready Concrete 2004, İstanbul, 10-12 June, 160-171, 2004.

·           Özkan, Ö., Kanıt, R., İlter, C., “Proje Programlama Problemlerinde Öncelik Kuralı Performansları”, Bilgi Teknolojileri Kongresi, Denzili, Pamukkale Üniversitesi, 7-9 Ekim.

·           Özkan Ö., Muratoğlu, Ö. “Deprem Bölgelerinin Bina Maliyetine Etkisi”, II. Kocaeli Deprem Sempozyumu, Kocaeli, Mart 2005.

·           Özkan Ö., Muratoğlu, Ö. “Zemin Sınıfları ve Deprem Bölgelerinin Bina Yatay Yüklerine Etkisi”, II. Kocaeli Deprem Sempozyumu, Kocaeli, Mart 2005.

·           Özkan Ö., Kanıt R., “Öncelik Kuralı, Kısıt Sayısı ve Proje Boyutlarının Proje Süresine Etkisi”, 3. Yapı İşletmesi Kongresi, İzmir, Ekim 2005.

·           Özkan Ö., Kanıt R., “Günlük Kaynak Kısıt Miktarının Proje Süresine ve Maliyetine Etkisi”, 3. Yapı İşletmesi Kongresi, İzmir, Ekim 2005.