## 3 Results and Analysis
### Application Efficiency of Mineral Admixtures  
Table 7 shows the cement strength efficiency after adding the mineral admixtures to the concrete. As can be seen, in addition to reducing the cement content, mineral admixtures can provide excellent compressive strength. Figure 8 shows that the cement strength application efficiency is between \(-\)19.51% and \(+\)11.05%. The samples with application efficiencies higher than that of the controlled sample were FA30, DLS10, and GLP10. GLP10 had the highest application efficiency. The sample with the lowest efficiency was DLS30. The efficiencies of the other samples were below \(-\)10%. This indicates that, though not all samples with an addition of mineral admixtures had application efficiencies higher than that of the controlled sample; they could still present certain compressive strengths. Table 8 shows the cost estimation of lightweight aggregate concrete with mineral admixtures replacing a portion of the cement. The costs were calculated according to the cement amount replaced by mineral admixtures and unit price, as shown in Figure 15. The most economic sample was DLS, with a cost reduction of 9.8-29.5%, followed by GLP of 8.4-25.2%, fly ash of 6.4-19.2%, and BSF of 4.2-12.6%.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{3}{*}{**No.**} & \multirow{3}{*}{\
\begin{tabular}{c} **Cement** \\ **(kg/m3)** \\ \end{tabular} } & \multicolumn{2}{c}{
\begin{tabular}{c} **Mineral** \\ **Admixtures** \\ \end{tabular} } & \multicolumn{2}{c}{**CSE (MPa/kg) (1) ***} & \multicolumn{2}{c}{**Application**} \\  & & **Admixtures** & & & & **Efficiency (\%)** \\ \cline{1-1}  & & **(kg/m3)** & **7 day** & **28 day** & **91 day** & **120 day** & **(2) * \\ \hline MA0 & 540 & 0 & 0.060 & 0.069 & 0.071 & 0.071 & — \\ FA10 & 486 & 54 & 0.060 & 0.064 & 0.072 & 0.072 & \(-\)8.77 \\ FA30 & 378 & 162 & 0.069 & 0.079 & 0.102 & 0.106 & \(+\)1.05 \\ BFS10 & 486 & 54 & 0.067 & 0.074 & 0.078 & 0.079 & \(-\)0.50 \\ BFS30 & 378 & 162 & 0.082 & 0.086 & 0.094 & 0.099 & \(-\)7.44 \\ DLS10 & 486 & 54 & 0.067 & 0.079 & 0.081 & 0.082 & \(+\)3.12 \\ DLS30 & 378 & 162 & 0.062 & 0.071 & 0.081 & 0.087 & \(-\)19.51 \\ GLP10 & 486 & 54 & 0.071 & 0.081 & 0.087 & \(0.089\) & \(+\)11.05 \\ GLP30 & 378 & 162 & 0.075 & 0.083 & 0.093 & 0.097 & \(-\)7.46 \\ \hline \hline \end{tabular}  
* \({}^{1}\) CSE = Compressive Strength (MPa) on 7 day, 28 day, 91 day and 120 day/Cement (kg/m3). 2
* Application Efficiency = [(Compressive Strength of Mineral Admixtures—Compressive Strength of MA0)/(Compressive Strength of MA0)] \(\times\) 100%; 3 W/B = 0.40.  
\end{table}
Table 7: The strength application efficiency of MLAC.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{3}{*}{**No.**} & \multirow{3}{*}{\
\begin{tabular}{c} **Cement** \\ **(kg/m3)** \\ \end{tabular} } & \multicolumn{2}{c}{
\begin{tabular}{c} **Mineral** \\ **Admixtures** \\ \end{tabular} } & \multicolumn{2}{c}{**Price of Cerentitious**} & \multicolumn{2}{c}{**Economy**} & \multicolumn{2}{c}{**Economy**} \\  & & **(kg/m3)** & **Cement** & **Mineral** & **(NTD) (2)** & **Ratio (\%) (3)** \\ \cline{1-1} \cline{3-6} MA0 & 540 & 0 & 1350 & 0 & — & — \\ \cline{1-1} \cline{3-6} FA10 & 486 & 54 & 1215 & 48.6 & 86.4 & 6.4 \\ FA30 & 378 & 162 & 945 & 145.8 & 259.2 & 19.2 \\ BFS10 & 486 & 54 & 1215 & 78.3 & 56.7 & 4.2 \\ BFS30 & 378 & 162 & 945 & 234.9 & 170.1 & 12.6 \\ DLS10 & 486 & 54 & 1215 & 2.16 & 133 & 9.8 \\ DLS30 & 378 & 162 & 945 & 6.48 & 398.5 & 29.5 \\ GLP10 & 486 & 54 & 1215 & 21.6 & 113.4 & 8.4 \\ GLP30 & 378 & 162 & 945 & 64.8 & 340.2 & 25.2 \\ \hline \hline \end{tabular}  
* \({}^{1}\) The prices of cementitious materials (NTD/m3) are counted according to the unit price which provided by suppliers; NTD: New Taiwan Dollar. \({}^{2}\) Economy = 1350-(1); \({}^{3}\) Economy Ratio (%) = Economy/1350.  
\end{table}
Table 8: Economic efficiency of MLAC.