PSI - Issue 70

Abhijeet Singh et al. / Procedia Structural Integrity 70 (2025) 611–618

616

3.1. Regression Analysis for Result Outcomes

Table 3. Summary output of Regression Analysis For Cement

For Fresh Stage Regression Statistics

For Hardened Stage Regression Statistics

Regression Statistics

Multiple R R Square

0.996729 0.993469

1 1 1

0.95567 0.913304 0.783261 0.034839

Adjusted R Square 0.983672

Standard Error Observations

0.009562

1.45E-17

6

6

6

Slump value (mm) Residual Plot

0 2E-17 4E-17 6E-17 8E-17 1E-16

Residuals

50

60

70

80

90

100

Slump value (mm)

Fig. 6. Residual Plot of Slump of Concrete

Compressive strength (N/mm 2 ) 7 Days Residual Plot

-0.04 -0.03 -0.02 -0.01 0 0.01 0.02 0.03 0.04

Residuals

20 21 22 23 24 25 26 27 28 29 30

Compressive strength (N/mm 2 ) 7 Days

Fig. 7. Residual Plot of Compressive Strength at 7 days

The figure 6 is showing the residual plot of slump of concrete. In figure 6, the x-axis is representing the present slump value and the y-axis is representing the corresponding residuals. Similarly, in figure 7 and 8, the residual plots for compressive strength at 7 days and 28 days have been shown respectively. Figure 9 is representing the residual plot for split tensile strength at 28 days.