[1099] PROPOSAL OF MISTING TECHNIQUE TO PROMOTE THE CARBONATION OF HARDENED CEMENT PASTE
Keywords:CO2 absorption、waste concrete、carbonation、technique、hardened cement paste
This study utilized the principle that wet-dry cycles promote carbonation and proposed a method to enhance the carbonation of hardened cement paste powder (0.6-1.18 mm) with a w/c ratio of 0.6 at ambient temperature and humidity by applying the misting technique. The results indicated that longer misting durations and shorter misting intervals led to higher carbonation, with the highest carbonation of 55% observed in mist30s after 28 days, which was 20% higher than in RH60. Additionally, Ca(OH)₂ was fully carbonated by misting, while 87% was consumed under RH60 after 28 days.