Abstract
Pervious geopolymer concrete (PGC), known for its high hydraulic permeability and pollutant adsorption, has emerged as a sustainable solution to mitigate stormwater runoff, pollutant transport, and reduce the global warming potential (GWP) of pavements. Its sustainability can be further enhanced by incorporating recycled concrete aggregate (RCA). This combined use of geopolymer binders and RCA to produce pervious geopolymer recycled aggregates concrete (PGRAC) remains underexplored. This study evaluates the performance of PGRAC in improving stormwater quality, assessing both contaminant leaching and removal. Experimental parameters included binder blends, design porosity, and RCA content. Mechanical and hydraulic tests confirmed that all mixes achieved adequate performance for pavement use. All mixes exhibited low leaching potential for most heavy metals, below regulatory limits, except for Boron. Mixes with 10 % porosity and 100 % RCA demonstrated superior contaminant removal due to enhanced pore structure, but were more susceptible to clogging. Overall, PGRAC demonstrated strong sustainability potential.
| Original language | English |
|---|---|
| Article number | 100798 |
| Journal | Developments in the Built Environment |
| Volume | 24 |
| DOIs | |
| Publication status | Published - Dec 2025 |
Keywords
- Contaminant removal
- Geopolymer concrete
- Leaching
- Pervious pavements
- Stormwater quality
- Sustainable urban drainage systems
ASJC Scopus subject areas
- Civil and Structural Engineering
- Architecture
- Materials Science (miscellaneous)
- Building and Construction
- Computer Science Applications
- Computer Graphics and Computer-Aided Design