Understanding the Sustainable Use and Mechanical Characteristics of Recycled Permeable Concrete: Sustainable Low-Carbon Concrete Technology

Enhancing the performance of reclaimed permeable concrete plays a crucial role in reducing energy consumption during building material production while fostering sustainable development. To optimize the composition of reclaimed permeable concrete and improve its mechanical properties, this study investigates the impact of aggregate particle size distribution. Through experimental analysis, the effects of particle size distribution on the mechanical behavior of recycled aggregate permeable concrete were examined. The results indicated that when the water-cement ratios were set at 0.28, 0.30, and 0.32 with a porosity of 10%, the permeability coefficient increased by 28.1%, 50.9%, and 29.0%, respectively. The lowest recorded permeability coefficient of 1.23 mm/s was observed when the recycled permeable concrete had a water-cement ratio of 0.30 and an aggregate grading of 8:2 at a target porosity of 10%. The designed recycled permeable concrete met the permeability coefficient requirements outlined in the CJJ/T135-2009 standard, which mandates a minimum of 1 mm/s. Existing research on the influence of aggregate grading and other factors affecting the performance of recycled permeable concrete suggests that optimizing the mixture proportions can enhance its efficiency. Additionally, customizing the concrete composition based on specific construction requirements can significantly lower the manufacturing costs of building materials.