Comparative study on Steel fibre reinforced Cum control concrete under flexural and deflection
Fibre reinforced concrete, a composition of concrete and fibres is being prominently used for various important applications. The hook tain steel fibres assist in controlling the propagation of micro-cracks present in the matrix, first by improving the overall cracking resistance the matrix and later by bridging across even smaller cracks formed after the application of load on to the member thereby preventing there widening into major cracks. In the present paper, the effect of steel fibre reinforcement with different percentage of fibre 0, 1%, 2% and 3% by volume for M-40 grade of concrete with aspect ratio 50, 60 and 67 are studied. The beam is tested for flexural strength. The percentage increase through utilization of steel fibers is reported. A relationship between aspect ratio vs. flexural strength represented graphically.
SEISMIC ANALYSIS OF REINFORCED CONCRETE MODIFIED WITH GLASS AND BAMBOO HYBRID FIBERS
The aim of this study is first to develop hybrid fibre reinforced concrete (HFRC) and then to characterize and quantify the benefits obtained by the concept of hybridization. Hybrid composites were cast using two fibres namely Glass and Bamboo of different fibre proportions i.e., 1%, 1.5% and 2% in M35 grade of mix. Compressive test and split tensile strength were performed and results were extensively analyzed to associate with above fiber combinations. The dynamic properties are further analyzed for the optimum percentage of hybrid fibres using ETABS. The reinforced beams of a G+4 residential building is replaced with the optimum dosage of hybrid fibres and analyzed under seismic loads. It is concluded that the overall displacement of the structure is less when compared with conventional reinforced structure.
Ultimate load behaviour of bamboo-reinforced lightweight concrete beams
Abstract The classification of seven bamboos studied in accordance to their physical and mechanical properties, the type and method of application of water repellent treatment of bamboo splints and the bond strength between bamboo and lightweight concrete are described in this paper. The results of the experimental analysis of two simplysupported bamboo-reinforced lightweight concrete beams with an overall length of 340 cm and a cross-section of 12 cm by 30 cm width and height, respectively, subjected to two point loads up to collapse are presented. One beam of the same dimensions and concrete mix reinforced with steel was also tested for comparison of the results. Finally a recommendation based on the analysis of the results for the design of such beams is proposed.