Studying Flexural Behavior of Reinforced Fibrous Self- Compacted Concrete T- Beams Strengthened with CFRP SHEETS
Arjan Fakhraldin Abdullah1, Mazin Burhan Adeen2, Alya’a Abbas Al-Attar3

1Mr. Arjan Fakhraldin Abdullah, Department of Civil Engineering, College of Engineering University, Tikrit.
2Dr. Mazin Burhan Adeen, Department of Civil Engineering, College of Engineering University, Tikrit.
3Dr. Alya’a Abbas Al-Attar Technical College of Kirkuk.
Manuscript received on 11 January 2014 | Revised Manuscript received on 20 January 2014 | Manuscript Published on 30 January 2014 | PP: 28-38 | Volume-3 Issue-8, January 2014 | Retrieval Number: H1432013814/14©BEIESP
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Abstract: This research Studies the possibility of producing self-compacting concrete (SCC) containing Pozzolanic materials and reinforced with different types of fibers , 11% (by weight of cement) of silica fume were used and two types of fiber (Steel, Nylon) with different volume fraction , also it studies the structural behavior of the self-compacted reinforced T-section beams. The current study includes a practical program considers the effect of adding steel and nylon fibers to structural behavior of T section self-compacting concrete such as compressive and tensile strength and flexural behavior represent by load-deflection curves, variables that which studied after obtaining the self compacting was the volumetric ratios of fibers which used (0.2, 0.3 and 0.4) % ratios for steel and nylon and hybrid fiber. Also Rehabilitate the T- beams after failure in bending by strengthened it with carbon fiber strips (CFRP), and find out the effect of external strengthening by CFRP on the flexural resistance of concrete & reinforced concrete beams. The practical results of the current study indicated that when adding steel fiber to the self-compacted concrete it has shown a good effect of the increase in compressive, tensile and flexural strength, also it has effect of reducing deflection, this effect increasing by increase of the volumetric ratio of steel fiber. while adding of nylon fibers lead to a slight increase in compressive strength and this effect decrease by fiber content increasing and the addition of these fibers lead to a small increase in the tensile and bending strength , also adding hybrid fiber in all ratios lead to an improvement in hardened properties of self-compacted concrete .The results of repair by strengthening the beams with carbon sheets indicated that the carbon fibers had a noticeable effect in increasing the ultimate load in all beams and testing results showed that the flexural strength increased between (6.42% – 29.62%) for concrete beams, and between (9%-33%) for rehabilitated damaged concrete beams.
Keywords: Fibers Self-Compact Concrete, Flexural Strength, CFRP, and Epoxy.

Scope of the Article: Concrete Structures