| Title |
A Basic Study for CO2 Gas Curing Application to Cementitious Product |
| Keywords |
CO2 curing ; CO2 uptake ; Carbonation ; Cement mortar |
| Abstract |
As global warming is higher by CO2, most of countries have an effort to develop CO2 reducing technology like a CO2 sequestration and a CO2 curing method using cement based materials. In this study, CO2 uptake rate, compressive strength and length were investigated when CO2 curing method was applied in cement mortar. The CO2 uptake rates were ranged from 10.1 % to 11.6 %, average 10.5 % by mass measurement method. On the early compressive strength, 1 hour CO2 curing specimens were higher than 1 hour atmospheric curing specimens but lower than 5 hours steam curing specimens. As time was elapsed until 28 days, the compressive strengths of specimens by atmospheric curing and steam curing were similarly increased both. But the compressive strengths of 1 hour CO2 curing specimens were lower than other two curing methods. The dry shrinkage rates of 1 hour CO2 curing specimens were lower than those of other two curing methods by pore-filling effect of carbonation. |