Title : Improving mechanical properties of recycled aggregate pervious concrete using Taguchi method
Abstract:
The construction and demolition waste problem is growing worldwide, as these materials are non-degradable. This research investigates the improvement of mechanical properties of pervious concrete made with recycled aggregates, aiming for sustainable solutions. The study uses polyethylene glycol (PEG 400) for internal curing and steel/synthetic fibers to enhance performance. Taguchi’s method was employed for experimental design, reducing the number of trials while optimizing mix parameters. Five factors at four levels produced sixteen mixes (L16 array). Tests included compressive, tensile, flexural, bond strength, and slab performance. Results showed that recycled aggregate content and PEG dosage had the most significant influence, with an optimal mix at 10% recycled aggregates, 0.05–0.1% steel fibers, W/C ratio of 0.36, and 2% PEG 400. Synthetic macro-fibers were less effective. ANOVA confirmed the dominant effects of recycled aggregates and PEG on compressive and tensile strength. The study concludes that the Taguchi method effectively identifies optimum parameters, reduces costs, and improves the sustainability and mechanical performance of recycled aggregate pervious concrete.
