# Predicting Compressive Strength of 3D Printed Mortar in Structural Members Using Machine Learning
## 6 Conclusions
\begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{Ref.} & \multicolumn{2}{c}{**Cement**} & \multirow{2}{*}{
\begin{tabular}{c} **Water** \\ **(kg/m\({}^{3}\))** \\ \end{tabular} } & \multirow{2}{*}{W/C} & \multicolumn{2}{c}{**Coarse Aggregate**} & \multicolumn{2}{c}{**Fine Aggregate**} & \multicolumn{2}{c}{**Superplasticizer**} & \multicolumn{2}{c}{**Compressive Strength**} \\  & & & & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [37]} & \multicolumn{2}{c}{572.34 FA} & \multirow{3}{*}{144.09} & \multirow{3}{*}{1219.74} & \multirow{3}{*}{10.05} & \multirow{3}{*}{36} \\  & & & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \cline{1-1}  & & 35.52 Slag & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \cline{1-1}  & & 101.86 SF & & & & & & & & & & (MPa/m\({}^{3}\)) \\ \cline{1-1}  & & 140.739 K-Si & & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [38]} & \multicolumn{2}{c}{300} & \multirow{3}{*}{90} & \multirow{3}{*}{0.3} & \multirow{3}{*}{150} & \multirow{3}{*}{1.3} & \multirow{3}{*}{49.7} \\  & & 300 FA & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [39]} & \multicolumn{2}{c}{83.55 FA} & \multirow{3}{*}{124.8} & \multirow{3}{*}{148.65} & \multirow{3}{*}{2.64} & \multirow{3}{*}{35} \\  & & 5.04 Slag & & & & & & & & & (MPa/m\({}^{3}\)) \\ \cline{1-1}  & & 10.86 SF & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [40]} & \multirow{3}{*}{682.75} & \multirow{3}{*}{236.25} & \multirow{3}{*}{850} & \multirow{3}{*}{1.76} & \multirow{3}{*}{87} \\  & & 675 & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \hline \multirow{3}{*}{[PERSON], et al. [41]} & \multirow{3}{*}{300} & \multirow{3}{*}{115.7143} & \multirow{3}{*}{514.2857} & \multirow{3}{*}{1.242857} & \multirow{3}{*}{43.1} \\  & & 300 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \cline{1-1}  & & 300 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \cline{1-1}  & & 300 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \cline{1-1}  & & 300 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) (28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [44]} & \multirow{3}{*}{675 FA} & \multirow{3}{*}{350} & \multirow{3}{*}{1220} & \multirow{3}{*}{54} & \multirow{3}{*}{1.04} & \multirow{3}{*}{62} \\  & & 250 SF & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \hline \multirow{3}{*}{[PERSON], et al. [45]} & \multirow{3}{*}{620.5} & \multirow{3}{*}{226.5} & \multirow{3}{*}{1241} & \multirow{3}{*}{0.93} & \multirow{3}{*}{62} \\  & & 580 & & & & & & & & (MPa/m\({}^{3}\)) \\ \cline{1-1}  & & 166 FA & & & & & & & (MPa/m\({}^{3}\)) & **(MPa) \\ \cline{1-1}  & & 83 SF & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \hline \multirow{3}{*}{[PERSON], et al. [47]} & \multirow{3}{*}{600} & \multirow{3}{*}{270} & \multirow{3}{*}{1258} & \multirow{3}{*}{864.1} & \multirow{3}{*}{17.3} & \multirow{3}{*}{44.09} \\  & & & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** \\ \hline \multirow{3}{*}{[PERSON], et al. [48]} & \multirow{3}{*}{480.2} & \multirow{3}{*}{327.4} & \multirow{3}{*}{589.4} & \multirow{3}{*}{13} & \multirow{3}{*}{17.66} \\  & & 480.2 & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \hline \multirow{3}{*}{[PERSON], et al. [49]} & \multirow{3}{*}{79 SF} & \multirow{3}{*}{240} & \multirow{3}{*}{1154} & \multirow{3}{*}{8.27} & \multirow{3}{*}{23.5} \\  & & 172 FA & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \hline Meurer and Classen [50] & \multirow{3}{*}{550} & \multirow{3}{*}{280} & \multirow{3}{*}{1172} & \multirow{3}{*}{22} & \multirow{3}{*}{65.8} \\  & & 100 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \hline \multirow{3}{*}{[PERSON], et al. [51]} & \multirow{3}{*}{100} & \multirow{3}{*}{50} & \multirow{3}{*}{0.5} & \multirow{3}{*}{250} & \multirow{3}{*}{0.5} & \multirow{3}{*}{26.3} \\  & & 100 & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \cline{1-1}  & & 100 & & & & & & & & (MPa/m\({}^{3}\)) & **(28 days)** \\ \hline \multirow{3}{*}{[PERSON], et al. [51]} & \multirow{3}{*}{100} & \multirow{3}{*}{46} & \multirow{3}{*}{0.46} & \multirow{3}{*}{250} & \multirow{3}{*}{1} & \multirow{3}{*}{26.6} \\  & & 100 & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \cline{1-1}  & & 100 & & & & & & & & (MPa/m\({}^{3}\)) & **(MPa)** (28 days) \\ \hline \hline \end{tabular}
\end{table}