Abstract
This paper deals with the experiment investigations on the Basalt Fibre Reinforced Polymer composites wrapped concrete specimens for determining the mathematical prediction for retrofitting of concrete specimens. For the past three decades, fibres are being effectively utilized in engineering fields. Some countries do not have specified codes for structural designing of Fibre Reinforced Polymer composites. Especially for this situation, the mathematical predictions were determined by experimentally for Basalt Fibre Reinforced Polymer composites retrofitted concrete. For this experiment, cubes, cylinders and prisms were cast using M30 grade concrete to analyze the characteristic strengths. The tests were carried out with and without Basalt Fibre Reinforced Polymer wrapping and retrofitted after 0%, 30%, 60% and 90% fatigue loaded or preloaded specimens. The retrofitted specimens with Basalt Fibre Reinforced Polymer wrapping, even after 90% fatigue loaded possess higher strength than conventional one. The observed readings were analyzed and mathematical prediction was developed by using readings and graphical representations. From the study, similar results were observed through experiments and mathematical predictions.
Highlights
Retrofitting means strengthening the deteriorated or damaged structures with suitable technology for keep the originality for long service
The double Basalt Fibre Reinforced Polymer composite (BFRP) wrapped specimens showed more strength than conventional and BFRP single wrapped cube specimens. This increment in strength is due to the enhancement of stiffness and slight increase in moment of inertia caused by the BFRP layers
The experimental results prove that BFRP wrapping aids in increasing the strengths both in normal concrete and retrofitted specimens
Summary
Retrofitting means strengthening the deteriorated or damaged structures with suitable technology for keep the originality for long service. A structure is designed for a particular service period. In this period the structures may be affected due to fatigues, creep loss, wear, gradual loss of strength, multiple environments effects, natural hazards, etc. In these conditions, the structures should be retrofitted for extending the service life. The wrapping method is very simple and handy method to retrofit structures. In this paper fatigued concrete specimens retrofitted with Basalt Fibre Reinforced Polymer composite (BFRP) wrapping for determining the strength by mathematical predictonly. According to that lot of research papers were reviewed and Fibre Reinforced Polymer (FRP) composite wrapping technique was studied
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