First and foremost, praise and thanks to ALLAH, the Most Gracious, the Most Merciful, and peace are upon His Prophet. It gives me a great pleasure to express my deep sense of gratitude and indebtedness to my supervisors Prof. Ayman A. Seleemah, Prof. Mohamed A. Sakr, and Assistant Prof. Tarek M. Khalifa for their valuable support and encouraging mentality throughout the project. I am highly obliged to them for providing me the opportunity to carry out the ideas and work during my project and helping me to gain successful completion of the project. My great appreciation to ''DELTAMIX for ready concrete" company for their assistance in casting of the RC beams. Additionally, the tests were carried out in the reinforced concrete and heavy structures laboratory, Faculty of Engineering, Tanta University, Egypt. My sincere thanks to my parents, for their advice and timely encouragement which always kept my moral level very high. Last but not least, I would like to share this moment of happiness with my wife, son (Eyad), brothers and sisters and friends.