Impact of PET and microfiber fibers on the mechanical properties of pervious concrete: a canonical correlation approach.

The objective was to analyze the effect of polypropylene microfibers and PET fibers on the mechanical properties and electrical resistivity (ER) of pervious concrete. Three mixtures were designed—control, with microfibers, and with PET—and tested in compression, tension, flexure, ER, and resonance frequency. The results were integrated through a Canonical Correlation Analysis (CCA) to identify multivariate relationships between fiber reinforcement and material performance. CCA revealed significant correlations between fiber incorporation and increases in mechanical strength, as well as their relationship with variations in ER. This study is original in applying CCA to pervious concrete: fibers improve structural behavior, and CCA provides a precise and comprehensive multivariable interpretation.