## 5 Sample Preparation, Size, and Test of Sample  
For mechanical performance, three main aspects were defined for example flexural strength, compressive strength, and split tensile strength. Compressive strength for all concrete samples was determined at 7, 28, and 90 days of curing. Concrete cylinders that had a height of 300 mm and a diameter of 150 mm were prepared and then tested as per ASTM C 39 [45]. To evaluate split tensile strength, cylinders that had a height of 300 mm and diameter of 150 mm were prepared and then tested at 28 and 90 days of curing as per ASTM C 496 [46]. The flexural strength of concrete samples was measured using samples that had the size of 100 mm \(\times\) 100 mm \(\times\) 500 mm at 28 and 90 days of curing as per ASTM C 78 [47].To bring uniformity to the research, three samples for each test were prepared and tested and their average value was taken as the final value for that test. To determine the durability performance, acid resistance of concrete, water absorption, and chloride penetration tests were performed. To evaluate the impact of sulfuric acid (H\({}_{2}\)SO\({}_{4}\)) attack on each concrete sample. Cubical samples with a size of 100 mm were utilized. These samples were placed in a tap water tank for 28 days. Samples were oven-dried at 45 \({}^{\circ}\)C for one day after curing, then the samples were placed in a 5% (H\({}_{2}\)SO\({}_{4}\)) chemical for the acid test. Variation in the mass of samples is calculated at 28, 56, 90, and 120 days of specimens placed in acid. Variation in sample mass was measured by calculating sample mass before and after its placement in 5% (H\({}_{2}\)SO\({}_{4}\)). Water absorption of concrete samples was measured following ASTM C1585 [48]. Concrete samples which had a diameter of 100 mm and thickness of 50 mm were prepared and tested for water absorption test at 28 and 90 days of curing. For the chloride penetration test, samples in cylinder shape which had 100 mm height and 100 mm diameter were prepared. These samples were placed in a tap water tank for 28 days for curing. Samples were oven-dried at 45 \({}^{\circ}\)C for one day after curing, then the samples were placed in 5% sodium chloride chemical for 56 days. After placement of samples, samples were cut open, and spray was used on the failure surface with silver nitrate (AgNO\({}_{3}\)) solution with a normality of 0.1 N in water. Silver nitrate reacted with penetrated chloride and left silver color which shows the formation of silver chloride (AgCl) on the surface of failure which shows the sign of \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Mix ID**} & \multirow{2}{*}{**Binder (kg/m\({}^{3}\))**} & \multicolumn{2}{c}{**Fine**} & \multirow{2}{*}{**Coarse Aggregate**} & \multirow{2}{*}{**Water** (kg/m\({}^{3}\))**} & \multirow{2}{*}{**NF (kg)**} & \multirow{2}{*}{**SP (kg)**} \\  & & & & & & & \\ \hline \multicolumn{1}{c}{**Cement**} & \multicolumn{1}{c}{**Silica Fume**} & \multicolumn{1}{c}{**NCA**} & \multicolumn{1}{c}{**RCA**} & \\ \hline RCA0-SF0-PC & 380 & 0 & 780 & 1080 & 0 & 190 & 0 & 0 \\ RCA50-SF0-PC & 380 & 0 & 780 & 540 & 476 & 190 & 0 & 0 \\ RCA100-SF0-PC & 380 & 0 & 780 & 0 & 951 & 190 & 0 & 0 \\ RCA0-SF20-PC & 304 & 76 & 780 & 1080 & 0 & 190 & 0 & 0 \\ RCA50-SF20-PC & 304 & 76 & 780 & 540 & 476 & 190 & 0 & 0 \\ RCA100-SF20-PC & 304 & 76 & 780 & 0 & 951 & 190 & 0 & 0 \\ RCA0-SF0-NFRC & 380 & 0 & 780 & 1074 & 0 & 190 & 13 & 2 \\ RCA50-SF0-NFRC & 380 & 0 & 780 & 537 & 471 & 190 & 13 & 2 \\ RCA100-SF0-NFRC & 380 & 0 & 780 & 0 & 945 & 190 & 13 & 2 \\ RCA0-SF20-NFRC & 304 & 76 & 780 & 1074 & 0 & 190 & 13 & 2 \\ RCA50-SF20-NFRC & 304 & 76 & 780 & 537 & 471 & 190 & 13 & 2 \\ RCA100-SF20-NFRC & 304 & 76 & 780 & 0 & 945 & 190 & 13 & 2 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Concrete Mixture Nomenclature and Ingredients Quantity in Cubic Meter. the depth of chloride penetration into samples. These penetrations were calculated at five various spots along the failed sample periphery.