Application of Porous Concrete as a Ventilation Wall for PM2.5 and PM10 Retention

This study investigates the potential use of porous concrete as a passive particulate-retaining ventilation wall material for reducing the penetration of airborne PM2.5 and PM10. The research compares the retention efficiency of porous concrete with that of conventional ventilation concrete blocks through an experimental test chamber in a short-duration laboratory experiment. The study shows that porous concrete exhibits retention efficiencies of 93.5% for PM2.5 and 93.9% for PM10, substantially outperforming traditional blocks, which show only 42.1% and 49.5% for PM2.5 and PM10, respectively. These findings demonstrate the potential of porous concrete as a passive particulate-retaining building component. However, further investigation of long-term particulate loading, airflow resistance, clogging, and regeneration performance is required before practical implementation.