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Abstract The use of carbon dioxide curing can effectively reduce the carbon emissions of traditional autoclaved aerated concrete and permanently store carbon dioxide. This study used cement, steel slag, tailings and other raw materials, and studied the effect of carbonization system on the performance and carbon fixation of aerated concrete through carbon dioxide curing. The study focused on exploring the effects of carbonation time, carbonation pressure, and carbon dioxide concentration on the strength, drying shrinkage, thermal conductivity, and carbon fixation of aerated concrete. The results showed that carbonation within 2 hours had a significant impact on improving the strength and carbon fixation of aerated concrete and reducing its drying shrinkage. When the carbonation pressure was lower than 0.5 MPa, increasing the carbonation pressure was beneficial to improve the performance of aerated concrete, and a stepwise carbonization system has a promoting effect on improving the performance of aerated concrete. When the CO2 concentration was higher than 75%, the CO2 concentration had little effect on the performance and carbon fixation of aerated concrete.
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Published: 28 November 2024
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2024, Vol. 0 
