This thesis presents the results of an experimental and analytical investigation on the mechanical properties and their application as the internal reinforcement of the new type of FRP composite material called Basalt Fiber Reinforced Plastic (BFRP) material.
The primary objective of the research was the determination of the important mechanical properties of the BFRP bars and their applicability as internal reinforcement in reinforced concrete beams.For the mechanical properties of the BFRP bars, BFRP bars of three different sizes were considered. The provided bars were of nominal size of 3mm, 5mm and 7mm with the volume fraction of 44%, 52% and 41% respectively. For the study of bond-strength of the BFRP bars, four pull-out cylinder tests were conducted for each size.
For the study of the flexural-application, fifteen different beams were studied, two of them being the steel-reinforced beams.The study on the mechanical properties revealed the tensile
-strength, rupture-strain and the longitudinal modulus of elasticity of the BFRP bars. From the pull-out cylinder test, a bond-slip model for BFRP bars was proposed. From the beam tests, it was observed that the ACI 440 can predict the moment-strength of BFRP reinforced beams with reasonable accuracy. It was also observed that the original Branson’s equation provides the lower bound and the ACI 440 provides the upper-bound for the load-deflection curve for BFRP reinforced beam. A relation for the effective moment of inertia for BFRP beams was proposed for load-deflection analysis.
A thesis presented to the Graduate Faculty of the University of Akron In partial fulfillment of the requirements for the Degree Master of Science Sudeep Adhikari.