A study of curing characteristics of CO2-absorption calcium silicate cement with respect to CO2 concentration
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CSC is an eco-friendly, low-energy cement-based material, the use of which can reduce CO2 emissions by up to 70% over theentire course of the manufacturing and curing processes when compared to typical cement mixes. In the present study, theability of CSC to realize its desired properties, i.e., being cured by the carbonation reaction, was examined. More specifically,CSC samples were cured at varying CO2 concentrations (0, 5, 10, 20%), and their ability to implement their desired propertieswas studied at each curing time (5, 10, 24, 48, 96 h). In doing so, the potential for utilizing CSC in practice was assessed. Theexperimental results showed that with higher CO2 concentration, the carbonation reaction of CSC became accordingly faster. The compressive strength was measured to be over 56 MPa at curing 7 days, indicating that these CSC samples providedexcellent early-stage strength. Also, all samples subjected to carbonation curing exhibited a much higher curing 7 dayscompressive strength regardless of the CO2 concentration in the curing atmosphere when compared to Type 1 cement inaccordance with the Korean Industrial Standards. This indicates that these materials have a high potential for extendedapplications.
Abstract
CSC is an eco-friendly, low-energy cement-based material, the use of which can reduce CO2 emissions by up to 70% over theentire course of the manufacturing and curing processes when compared to typical cement mixes. In the present study, theability of CSC to realize its desired properties, i.e., being cured by the carbonation reaction, was examined. More specifically,CSC samples were cured at varying CO2 concentrations (0, 5, 10, 20%), and their ability to implement their desired propertieswas studied at each curing time (5, 10, 24, 48, 96 h). In doing so, the potential for utilizing CSC in practice was assessed. Theexperimental results showed that with higher CO2 concentration, the carbonation reaction of CSC became accordingly faster. The compressive strength was measured to be over 56 MPa at curing 7 days, indicating that these CSC samples providedexcellent early-stage strength. Also, all samples subjected to carbonation curing exhibited a much higher curing 7 dayscompressive strength regardless of the CO2 concentration in the curing atmosphere when compared to Type 1 cement inaccordance with the Korean Industrial Standards. This indicates that these materials have a high potential for extendedapplications.
참고문헌 (11)
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