Assistant prof. dr. Sarmad Emad Ibrahim at University of Technology/ Materials Engineering Department participated in a master defense of the student Zahir Intisar, the dissertation entitled "Energy dissipation behaviors and mechanical characteristics of hybrid concrete subjected to dynamic loading" on Tuesday, September, 15th, at Almustansyria University/ College of Engineering. The Committee included:
1. Professor Muhammad Muslih Salman as a chair.
2. Assistant Professor Tawfiq Wasmi Muhammad- as a committee member.
3. Assistant Professor Sarmad Emad Ibrahim- as a committee member.
4. Assistant Professor Yasir Khleel Ibrahim- as an advisor and a committee member.
5. Dr. Hamza Mustafa Kamal- as an advisor and a committee member.
Congratulations to the student on his graduation.
Abstract:
In this work, a hybrid concrete composite prepared by adding two fibers types, steel, and polypropylene. Firstly, two groups ofconcrete samples made by incorporating steel and polypropylene fibers individually at different volume fractions ( 0.25, 0.5, 0.75, 1 % ). This work designates the effects of hybrid fibers and its modulus on concrete dissipation energy under various dynamic loadings (ultrasonic pulse velocity UPV, Impact strength), and measured as a hybrid and individual fiber concrete.
New concrete properties results showed that adding fibers to the concrete mixture would cause a significant reduction in the fresh state properties of Fiber-reinforced concrete (FRC). Steel fibers reinforced concrete (SFRC), always shows better results in all the strength types than polypropylene fiber reinforced concrete (PFRC), while for the Hybrid fibers reinforced concrete HFRC group shows an intermediate value between the fore mentioned groups related to conventional concrete.
