Mathematical Models Viability for Bi-Material Forte Appraisal

This study examines the mechanical traits of bi-material concrete containing polypropylene fiber. This analysis aims to establish a relationship between bi-material concrete’s compressive strength (CS), split tensile strength (STS), and flexural strength (FS). M25 grade of bi-material concrete is designed, and polypropylene fiber is added to half of the concrete. Polypropylene fiber (PPF) was included in concrete with 0.20, 0.35, 0.50, 0.75, 1.00, and 1.50% by the weight of cement. Different test (CS, FS, STS) was performed over the bi-material concrete after 28 days of the curing period. Mathematical models were made by performing regression analysis over the experiment data and matched with the other models in the previous studies. Mechanical properties of the definite increase when the polypropylene fiber increases up to 0.5% compared to conventional concrete. It is seen that the empirical values fall within reach of expected values when the predicted values are compared to the experimental results. In this study, the existing analytical models and the relationship between mechanical traits of bi-material concrete are evaluated and matched with the models present in previous studies, and a new model is proposed.