## 3 Results and Discussion  
### Compressive Strength  
Samples were tested for the determination of compressive strength. Three samples for each ratio (six ratios) and for each material (three materials) were developed and tested. Temperature variation was from room Temperature (27 \({}^{\circ}\)C) to 400 \({}^{\circ}\)C. Samples were also tested beyond that limit at 500 \({}^{\circ}\)C but they were unable to be tested for compressive strength because of spalling. Compressive strength can be observed at both room temperature and elevated temperature in Table 4. With the change of percentage, the behavior of marble powder (MP) was found best compared to its other two competitors (i.e., S.F and GGBFS).  
Furthermore, comparative analysis with previous studies shows that strength of concrete can be explored with all three additives depending on their availability and economics because there is very little difference in highest strength values (Figure 3).  
Figure 2: (a) Compression; (b) split tensile; and (c) flexural strength test mechanisms.  
\begin{table}
\begin{tabular}{r r r r r r r r r} \hline \hline  & \multicolumn{2}{c}{**Material Replaced**} & \multicolumn{5}{c}{**Silica Fume (S.F)**} \\ \cline{2-9}  & **Days** & **Temp (\({}^{\circ}\)C)** & **0\%** & **5\%** & **10\%** & **15\%** & **20\%** & **25\%** \\ \hline
7 & 27 (R.T.) & 13.8 & 15.8 & 16.3 & 17.1 & 18.1 & 19.2 \\
14 & 27 (R.T.) & 14.2 & 16.3 & 17.1 & 18.4 & 19.7 & 21.3 \\
28 & 27 (R.T.) & 15.7 & 16.4 & 19.4 & 20.1 & 22.4 & 24.8 \\
28 & 100 \({}^{\circ}\)C & 16.9 & 17.7 & 19.6 & 21.8 & 26.7 & 27.1 \\
28 & 200 \({}^{\circ}\)C & 17.1 & 18.1 & 20.7 & 22.6 & 28.3 & 29.1 \\
28 & 300 \({}^{\circ}\)C & 17.9 & 19.2 & 22.3 & 23.8 & 28.9 & 29.6 \\
28 & 400 \({}^{\circ}\)C & 18.2 & 21.7 & 24.8 & 26.7 & 29.1 & 30.8 \\ \hline \multicolumn{9}{c}{**Material Replaced**} & \multicolumn{5}{c}{**Ground Granulated Blast Furnace Slag (GGBFS)**} \\ \cline{2-9}  & **Days** & **Temp (\({}^{\circ}\)C)** & **0\%** & **5\%** & **10\%** & **15\%** & **20\%** & **25\%** \\ \hline
7 & 27 (R.T.) & 13.8 & 14.0 & 14.9 & 15.8 & 17.4 & 18.4 \\ Compressive & 14 & 27 (R.T.) & 14.2 & 18.3 & 17.9 & 18.1 & 19.0 & 20.3 \\ Strength (MPa) & 28 & 27 (R.T.) & 15.7 & 17.8 & 19.1 & 19.7 & 20.3 & 22.4 \\
28 & 100 \({}^{\circ}\)C & 16.9 & 18.1 & 20.0 & 20.6 & 21.7 & 24.6 \\
28 & 200 \({}^{\circ}\)C & 17.1 & 19.4 & 21.1 & 21.8 & 22.8 & 25.1 \\
28 & 300 \({}^{\circ}\)C & 17.9 & 20.1 & 22.4 & 23.7 & 24.1 & 26.7 \\
28 & 400 \({}^{\circ}\)C & 18.7 & 22.4 & 24.8 & 25.6 & 26.7 & 29.3 \\ \hline \multicolumn{9}{c}{**Material Replaced**} & \multicolumn{5}{c}{**Marble Powder (MP)**} \\ \cline{2-9}
**Days** & **Temp (\({}^{\circ}\)C)** & **0\%** & **5\%** & **10\%** & **15\%** & **20\%** & **25\%** \\ \hline
7 & 27 (R.T.) & 13.8 & 15.7 & 17.3 & 17.7 & 19.31 & 20.1 \\
14 & 27 (R.T.) & 14.2 & 16.4 & 19.3 & 20.6 & 22.87 & 26.5 \\
28 & 27 (R.T.) & 15.7 & 16.9 & 20.5 & 25.6 & 26.4 & 28.3 \\
28 & 100 \({}^{\circ}\)C & 16.9 & 17.2 & 23.4 & 26.3 & 28.1 & 29.1 \\
28 & 200 \({}^{\circ}\)C & 17.1 & 17.9 & 25.7 & 27.7 & 29.4 & 30.8 \\
28 & 300 \({}^{\circ}\)C & 17.9 & 18.6 & 26.1 & 29.1 & 30.2 & 30.8 \\
28 & 400 \({}^{\circ}\)C & 18.7 & 19.5 & 27.3 & 30.4 & 31.6 & 31.9 \\ \hline \hline \end{tabular}
\end{table}
Table 4: Test Results for hardened self-compacted concrete (compressive strength, MPa).  
Figure 3: Comparative compressive strength trend with respect to cement replacement of previous studies ([PERSON] [7], [PERSON] [9], [PERSON] [8], [PERSON] [42] and [PERSON] [5]).