Laboratory Analysis of Self-Healing Concrete’s Load-Bearing Properties

Abstract

This empirical study investigates the mechanical strength properties of self-healing concrete through comprehensive experimental analysis. The research examines three primary self-healing mechanisms: microcapsule-based healing agents, bacterial concrete systems, and shape memory alloy integration. A total of 180 concrete specimens were tested over 28, 56, and 90-day curing periods to evaluate compressive strength, tensile strength, flexural strength, and healing efficiency. The experimental methodology incorporated standardized testing protocols with controlled crack initiation and subsequent healing evaluation. Results demonstrate that bacterial concrete systems achieved the highest compressive strength recovery of 89.2% after 90 days, while microcapsule-based systems showed superior initial healing rates of 72.3% within 28 days. Shape memory alloy integration exhibited consistent performance across all strength parameters with 76.8% average recovery. Statistical analysis using ANOVA revealed significant differences (p<0.05) between healing mechanisms and their effectiveness over time. The study establishes empirical relationships between healing agent concentration, crack width, and strength recovery, providing quantitative data for practical applications. Comparative analysis with conventional concrete showed 15-20% enhanced durability in self-healing specimens. These findings contribute to the development of sustainable construction materials with extended service life, reduced maintenance costs, and improved structural reliability. The research provides critical empirical data for engineers and researchers developing next-generation concrete technologies for infrastructure applications