Advancing sustainable rubber aggregate concrete: an integrated framework for performance modeling, life cycle assessment and optimized mix design

Le résumé fourni par la source

Converting waste tires into rubber particles for concrete aggregates enables efficient waste utilization while providing lightweight, energy-absorbing and sound-insulating properties. Adoption is constrained by variable performance and trial-and-error mix design. This study proposes an intelligent framework integrating mechanical performance prediction, life cycle assessment (LCA) and multi-objective optimization. Using 1006 experimental records, a Bayesian probabilistic model predicts compressive strength from the water/cement ratio, aggregate/cement ratio, sand ratio and rubber replacement. A complementary LCA evaluates carbon emissions and costs, including reuse benefits. Particle swarm optimization explores trade-offs among strength, environmental impact and cost. Results show that compressive strength increases with sand content but decreases with higher water/cement and aggregate/cement ratios and rubber content, with coarse rubber weakening concrete more than fine; the Bayesian model captures these nonlinear trends better. The framework identifies optimal mixes, achieving significant reductions in carbon emissions and material costs, thereby providing rapid guidance for sustainable concrete formulation.

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