Technical Session 3:

Title:          Effect of steel fibre on shear - resistance of Defective Reinforce Concrete Beam Using with Polymer Cement Mortar
Authors:     Rahimullah Habibzai, Mitsuhiro Shigeishi
Abstract:   Steel fibre is effective material for strengthening deteriorated structures. This paper presents a comprehensive review and experimental work on the flexural behaviour of strengthened RC beams using SFRPCM. The review covers comparison of three types repairing/stiffening techniques. Filling crack area in tensile zone of RC beam with SFRPCM (steel fibre reinforced polymer cement mortar), filling and covering with extra layer of SFRPCM and after the crack was being filled with solidifying injection material; beam was covered with extra layer of SFRPCM (2.5cm thickness). Compressive and split tensile strength of concrete and SFRPCM were carried out. Flexural test was carried out to find the average ultimate peak load, maximum deflection, stiffness, toughness and crack pattern of reference and stiffened beams. It is concluded that the ultimate peak load and moment carrying capacity were improved in preloaded stiffened beams. The mechanical properties were improved in preloaded re-strengthened beams and deflection was reduced.

Keywords: Strengthening RC beams, Repairing, Reinforced concrete beams, Steel fibre reinforced concrete
Pages:       076-078

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