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IJSTR >> Volume 3- Issue 9, September 2014 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Response Of Reinforced Concrete Beams Retrofitted By Ferrocement

[Full Text]

 

AUTHOR(S)

Dr. Ragheed Fatehi Makki

 

KEYWORDS

Index Terms: Ferrocement, Rehabilitation, Strengthening, Repairing, R.C.Beams

 

ABSTRACT

Abstract: In this paper, experimental works is presented to investigate the behavior of reinforced concrete beams retrofitted by ferrocement to increase the strength of beams in both shear and flexure, ten reinforced concrete beams are casted in order to study different parameters such as shear reinforcement (stirrups), different diameters of wire mesh used in rehabilitation, two types of rehabilitation are used first (strengthening) and second (repairing) the beams are initially stressed to a different prefixed percentage of the ultimate load and finally mechanical method is used to fixed the wire mesh of ferrocement (using bolts) to eliminate the debonding of ferrocementand trying to reach the full maximum tensile strength of ferrocement. The experimental results indicated that the rehabilitation technique (strengthening and repairing) of R.C. beams by using ferrocement system is applicable and can increase the ultimate load from (69.8-175% in case of strengthening) and from (50.94-125% in case of repairing), also the test results for strengthening beams showed that the effect of diameter of ferrocement wire mesh (changing from 1.2 to 2.2mm) on the ultimate strength of R.C. beams will have an increase relation from {(95-175% without steel stirrups) and (69.8-126.4% with steel stirrups)}. Also for repairing beams the results state that the effect of diameter of ferrocement wire mesh (changing from 1.2 to 2.2mm) on the ultimate strength of R.C. beams will have an increase relation from {(67.5-125% without steel stirrups) and (50.94-84.9% with steel stirrups)}.

 

REFERENCES

[1] Tumar, A., "Retrofitting Of Shear Deficient R.C. Beams Using Ferrocement Laminates", M.Sc. Thesis, Thapar Institute Of Engineering and Technology, Patiala, 2006.

[2] ACI Committee 549, "Guide for The Design, Construction and Repair of Ferrocement", ACI Structural Journal, May June 1988.

[3] Aiexander, D., "What Is ferrocement", Journal of Ferrocement, Vol.22, No.1, January 1992.

[4] Iraqi Specification No. 5, "Portland Cement", Baghdad, 1984.

[5] Iraqi Specification No. 45, "Natural Sources for Gravel that is Used in Concrete and Construction", Baghdad, 1984.