COMPARATIVE STUDY OF DIFFERENT TYPES OF REPAIR MATERIALS IN FLEXURE

Laxmi, Shlok Singh

Abstract: Repair and retrofitting of existing structures have become a major part of the construction activity. Some of the structures are damaged by load induced stresses, environmental effects etc. To avoid high cost of structural replacement and to maintain structural integrity different repair and rehabilitation techniques are required. The most common form of repair for a deteriorated concrete is through patching, thus increasing the design life of the structure. The objective of this experiment is to investigate the performance of different types of repair materials (mortar based and commercial repair products).Seven RCC beams of size 1500mm×150mm×200mm were casted which include one concrete beam as control specimen (no repair)and six beams were casted by providing a wide mouthed trapezoidal notch at the bottom surface of the beam and all beams were cured for 28 days. Beams with notches were then patched with six selected types of repair materials in which one is repaired with normal concrete, three with mortar based repair materials and two with commercially available repair products and membrane cured for 28 days. All these beams were tested for flexural strength using two point loading in loading frame. Results were compared with control beam (no repair) and beam repaired with normal concrete. .

Keywords: Mix Design, Repair, Curing, Flexure, Failure.

DOI: https://doi.org/10.15623/ijret.2016.0516002