Supporting data for: Aplicaciones de la ceniza del carbón vegetal y fibras naturales en las propiedades geotécnicas y microestructurales del suelo expansivo - una revisión sistemática

This dataset contains the supporting data for the systematic review on the application of coal ash and natural fibers for expansive soil stabilization. The review followed PRISMA 2020 guidelines and focused on compaction, strength, and durability properties. Files included:1. MATRIZ DE CRIBA.xlsx - Complete screening matrix documenting the PRISMA workflow: 414 initial records → 413 after removing duplicates → 287 after title/abstract screening → 124 accessible full-text articles → 61 articles finally included in the qualitative synthesis. The matrix includes columns for author, year, title, DOI, pertinence, accessibility, and final selection decision. 2. EVALUACIÓN FINAL.zip - Compressed folder containing the full-text PDFs of the 61 articles finally included in the systematic review. All data are provided to ensure transparency and reproducibility of the review process.