Study on the Complete Stress–Strain Curve of WGP-WGS–Added Pervious Concrete under Uniaxial Compression

Massive pileups of waste glass and extreme shortages of mineral resources have caused increasingly prominent environmental and social problems, and the development and application of pervious concrete (PC) are restricted by its low mechanical properties, and research on the axial compression performance of PC is almost nonexistent. Waste glass powder (WGP) replaced 15%, 20%, and 25% of cementitious materials by equivalent mass, and waste glass sand (WGS) replaced 10%, 15%, 20%, and 25% of aggregates by equivalent mass in the preparation of pervious concrete (WGP-WGS–added PC). This article aims to investigate the water permeability and axial compression performance of WGP-WGS–added PC and to improve the mechanical properties of PC on the premise of ensuring water permeability. The study showed that the addition of WGP lowered the permeability and deformation performance (peak and extreme displacement) of PC while improving its mechanical properties. The optimal WGP content was 20%, but the improvement in energy dissipation capacity was not significant. The mechanical properties of PC first increased with an increasing water–cement ratio (W/C) and then decreased with even higher W/C, indicating that an optimum W/C content is 0.28. Moreover, the W/C ratio had a more significant impact on the deformation performance of PC prepared with a coarse aggregate particle size of 9.5–16 mm. The addition of WGS reduced the permeability of PC while improving its deformation performance and mechanical properties. The toughness performance of PC first increased with increasing WGS content and then decreased as WGS content continued to increase, indicating a significant 20% improvement in the toughness index of WGS compared to the reference specimen. After comprehensively evaluating the performance indicators of PC, the following recommendations are made: for coarse aggregates with particle size ranging from 4.75 to 9.5 mm, 20% WGP and 15% WGS content are recommended, and for coarse aggregates with particle size ranging from 9.5 to 16 mm, 20% WGP and 15%–20% WGS content are recommended. Through a series of microscopic experiments, it was concluded that for a particle size of 15–40 μm, 20% WGP exhibited higher pozzolanic reactivity.