Prediction of Chemical Anchor Bolt Pullout Performance on Bamboo Fiber Reinforced Concrete

In order to address concrete's low tensile and cracking properties, fibers are introduced into concrete mixtures. Bambusa Blumeana, a bamboo commonly found in the Philippines, is used as the fiber source in this study. Bamboo fibers with a length of 40mm are introduced (0%, 0.5%, 0.75%, 1%) into 20.7MPa concrete mixture as partial fine aggregate replacement. Three compression, three split tensile and six anchor bolt pull-out Bamboo Fiber Reinforced Concrete (BFRC) specimens for each bamboo fiber percentage were prepared, tested and analyzed. Results show that the maximum compressive strength (20.327 MPa) occurs at the control specimen while the split tensile strength (2.157 MPa) and anchor pull-out tests (21.70 kN) peak at BFRC0.5; thus, the optimal bamboo fiber percentage is at 0.5%. Analysis of Variance (ANOVA) Method was conducted and showed that the split tensile strength of BFRC mixes is comparable to that of the control specimen. The results of the pullout test were verified using an ANSYS FEM and found to be in good agreement. Lastly, a Regression analysis equation is proposed to predict the concrete breakout strength of BFRC using compressive, split tensile strength and bamboo fiber percentage as predictors with bamboo fiber percentage having the highest individual effect with an R2 Value of 0.907.