Uptake of Carbon Dioxide in the Demolished and Crushed Concrete

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  • 解体コンクリートによる二酸化炭素の固定
  • カイタイ コンクリート ニ ヨル ニサンカ タンソ ノ コテイ

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This study examined the uptake of CO2 in the demolished and crushed concrete by conducting an exposure experiment using crushed mortar and crushed concrete. The results of the experiment show that CO2 uptake increases significantly when the particle size is small and when repeatedly wetted and dried. The uptake of CO2 in concrete rubble obtained from intermediate processing factories was also examined. The amount of CO2 uptake in one ton of concrete rubble was estimated to be 11 kg. Using this value, the life cycle CO2 (LCCO2) of reinforced concrete was calculated and shown to be about 5.5% less than the uptake of CO2 compared with a case that did not consider it.

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