## 5 Results
M\({}_{\text{CaO}}\): 56.1 g/mol. Figure 9: Cement consumption (solid line and left-hand scale) and end use of cement in concretes (bars and right-hand scale) from 2005 to 2015. By applying Equation (6) to a CEM I with 95% clinker that contains 65% \(\text{CaO}_{\text{reactive}}\), it can be seen that the maximum amount of carbon dioxide that can be absorbed is equal to \(\text{CO}_{\text{2,max}}=(65/100)\times 0.95\times(44/56)=0.49\) kg \(\text{CO}_{\text{2}}/\text{kg}\) CEM I. This value only applies to a cement with 95% clinker (CEM I). \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \begin{tabular}{c} **Main** \\ **Types** \\ \end{tabular} & **Type Name** & \
\begin{tabular}{c} **Type** \\ **Notation** \\ \end{tabular} & **K 1** & **MAC 2** &
\begin{tabular}{c} **Factor** \\ **(K\({}_{\text{cement}}\)/K\({}_{\text{CEM I}}\))** \\ \end{tabular} & **(K\({}_{\text{cement}}\)/K\({}_{\text{CEM I}}\))** \\ \hline CEM 1 & Portland cement & CEM I & 95–100 & 0–5 & 95/95 = 1 & 1 & **0.49** \\ \hline \multirow{10}{*}{CEM II} & Portland-slag & CEM II/A-S & 80-88 & 0-5 & 80/95–94/95 & 0.84-0.99 & 0.41–0.48 \\  & cement & CEM II/B-S & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \cline{2-7}  & Portland-silica fume & CEM II/A-D & 90–94 & 0-5 & 90/95–94/95 & 0.95–0.99 & 0.46–0.48 \\ \cline{2-7}  & Portland-pozzolana & CEM II/A-P & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-P & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\  & Cement & CEM II/A-Q & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-Q & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \cline{2-7}  & Portland-fly ash & CEM II/A-V & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-V & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\  & Cement & CEM II/A-W & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-W & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \cline{2-7}  & Portland-burnt & CEM II/A-T & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\ shale cement & CEM II/B-T & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \cline{2-7}  & Portland-limestone & CEM II/A-L & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-L & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\  & Cement & CEM II/A-LL & 80–94 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\  & Cement & CEM II/B-LL & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \cline{2-7}  & Portland-composite & CEM II/A-M & 80–88 & 0-5 & 80/95–94/95 & 0.84–0.99 & 0.41–0.48 \\ cement & Cement & CEM II/B-M & 65–79 & 0-5 & 65/95–79/95 & 0.68–0.83 & 0.34–0.41 \\ \hline \multirow{3}{*}{CEM III} & Blast furnace & CEM III/A & 35–64 & 0-5 & 35/95–64/95 & 0.37–0.67 & 0.18–0.33 \\  & cement & CEM III/B & 20–34 & 0-5 & 20/95–34/95 & 0.21–0.36 & 0.10–0.18 \\  & cement & CEM III/C & 5–19 & 0-5 & 5/95–19/95 & 0.05–0.20 & 0.03–0.10 \\ \hline \multirow{3}{*}{CEM IV} & \multirow{2}{*}{Pozzolanic cement} & CEM IV/A & 65–89 & 0-5 & 65/95–89/95 & 0.68–0.94 & 0.34–0.46 \\  & CEM IV/B & 45–64 & 0-5 & 45/95–64/95 & 0.47–0.67 & 0.23–0.33 \\ \cline{1-1} \cline{2-7}  & \multirow{2}{*}{Composite cement} & CEM V/A & 40–64 & 0-5 & 40/95–64/95 & 0.42–0.67 & 0.21–0.33 \\ \cline{1-1}  & Cement & CEM V/B & 20–38 & 0-5 & 20/95–38/95 & 0.21–0.40 & 0.10–0.20 \\ \hline \hline \end{tabular}  
* 1 Clinker; 2 Minor additional constituents.  
\end{table} 
Table 3: Maximum amount of carbon dioxide, \(\text{CO}_{\text{2,max}}\) that the different EN 197-1 cements can absorb. Figure 10: Carbonation rate of Portuguese concretes made with different proportions of coal fly ash and ground granulated blast-furnace slag and (**a**) 251 kg/m\({}^{3}\) of cement, w/c = 0.65; (**b**) 342 kg/m\({}^{3}\) of cement, w/c = 0.44; and (c) 440 kg/m\({}^{3}\) of cement, w/c = 0.35 [17]. As far as other cements are concerned, this value drops in proportion to clinker content.