Akademik Veri Yönetim Sistemi
Clean Technologies and Environmental Policy, 2024 (SCI-Expanded)
This study investigated permeable concrete’s physico-mechanical durability and microstructural properties using recycled polypropylene aggregate (RpA) and basalt fiber (BF). RpA was used as a replacement for coarse aggregates with weight ratios of 5%, 10%, 15% and 20%, and BF was added to the mixtures with volume ratios of 0.25%, 0.5%, 0.75% and 1%. The study evaluated the physical, mechanical, permeability and durability properties of permeable concrete mixtures. The addition of RpA and BF reduced the density and slump of the concrete. For example, when RpA content was 20% and BF content was 1%, the dry density of concrete decreased from 1780 to 1828 kg/m3. The slump value decreased from 38 to 14 mm. The permeability coefficient increased with increasing RpA and BF amounts. For example, when the RpA ratio was 20% and the BF ratio was 1%, the permeability coefficient increased from 0.42 to 0.98 cm/s. The compressive strength decreased as the substitution rates of RpA increased. For example, the 28-day compressive strength of the mixture containing 20% RpA and 1% BF decreased from 23.52 to 12.85 MPa (compared to the reference mixture). Flexural strength was only reduced with the addition of RpA, but it increased by 0.75% BF. For example, the 28-day flexural strength of the mixture containing 20% RpA decreased from 2.96 to 2.42 MPa, while this value increased to 4.05 MPa with the addition of 0.75% BF. Using RpA alone increased the mass loss, but adding BF decreased the mass loss. For example, while the mass loss of the mixture containing 20% RpA was 17.7% at the end of 400 cycles, this value decreased to 13.8% with the addition of 0.75% BF. These results show that permeable concrete produced using RpA and BF can be used as a sustainable and durable materials in urban infrastructure projects. Graphical abstract: (Figure presented.)