http://www.iaeme.com/IJCIET/index.asp 592 editor@iaeme.com International Journal of Civil Engineering and Technology (IJCIET) Volume 9, Issue 12, December 2018, pp. 592-602, Article ID: IJCIET_09_12_065 Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=9&IType=12 ISSN Print: 0976-6308 and ISSN Online: 0976-6316 © IAEME Publication Scopus Indexed EFFECT BUBBLES ON THE BEHAVIOR OF REINFORCED REACTIVE POWDER CONCRETE DEEP BEAMS Mohammed Jaafar Hasan, Department of Civil Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq Dr. Mushriq Fuad Kadhim Al-Shamaa Dr., Civil Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq ABSTRACT Implementation of bubbles in reinforced reactive powder concrete deep beams due to reduce their weight are one of the practical solutions. These bubbles could reduce the beams ultimate strength and increase the mid-span deflection. An experimental work was carried out to test the effect of bubbles on the behavior of reactive powder concrete deep beams. Six simply supported deep beam had the same rectangular cross- section, flexural and shear reinforcement. They were cast with overall height (h) of 340 mm, width (b) of 120 mm and they were classified into two major groups (A and B) because of their total length (L) 0f (1000 mm and 1400 mm) respectively. The main parameter in this study were existing bubbles, flexural behavior and shear span to depth ratio. The results showed that increasing layer of bubbles caused a decreasing in first load cracking and ultimate loads and increasing in mid span deflection for all beams. Also, the result showed the existence of bubbles was caused reducing the weight of deep beam and ultimate load. For deep beam with shear span to depth ratio (1.11) and with one and two layers the reduction in weight was (9.35% and 18.7%) respectively, while in other hand, there were reduction in ultimate load with (7.31% and 11.7%) respectively. Moreover, the reduction in weight of deep beam with shear span to depth ratio (1.67) and with one and two layers were (13.09% and 26.18%) respectively resulting reduction in ultimate load (12.5% and 21.8%) respectively. Therefore, the effect of bubbles for deep beam with shear span to depth ratio (1.11) more useful than deep beam with shear span to depth ratio (1.67). Keyword head: Bubbles, Deep beam, Reactive powder concrete, shear span, weight reduction