Supplemental Materials for Enhancing Alkali Resistance of rGFRP fiber and Mechanical Properties of Cementitious Composites via Sol-Gel Synthesized Nano-ZrO2 Coatings

This Supplementary Materials file provides supporting figures and data for the main manuscript. It includes comparative SEM images and photographs of the rGFRP and alkali-resistant glass fibers (Fig. S1), a detailed table of their physical and mechanical properties (Table S1), and schematic diagrams alongside photographs of the key experimental setups used for the single-fiber pull-out test (Fig. S2), four-point bending test, and impact test (Fig. S3). These materials offer expanded characterization, property data, and methodological details that complement the findings discussed in the main article.