Table 1.

Five performance indices for estimation of overall performance indicator

Index (I)	Weighting (w)	Equation
Embodied carbon index (IEC)	3	$I_{\text{EC}}=\frac{\text{GWP}\text{of}\text{reference}\text{mixture}}{\text{GWP}\text{of}\text{selected}\text{mixture}}$
Service life index (ISL)	3	$I_{\text{SL}}=\frac{\text{Service}\text{life}\left(\text{in}\text{years}\right)\text{of}\text{reference}\text{mixture}}{\text{Service}\text{life}\left(\text{in}\text{years}\right)\text{of}\text{selected}\text{mixture}}$
Cost index (IC)	3	$I_{\text{C}}=\frac{\text{Cost}\text{of}{\text{m}}^3\text{concrete}\text{using}\text{reference}\text{mixture}}{\text{Cost}\text{of}{\text{m}}^3\text{concrete}\text{using}\text{selected}\text{mixture}}$
Embodied energy index (IE)	1	$I_{\text{E}}=\frac{\text{Embodied}\text{energy}\text{of}\text{reference}\text{mixture}}{\text{Embodied}\text{energy}\text{of}\text{selected}\text{mixture}}$
Strength Index (IS)	1	$I_{\text{S}}=\frac{f_{\text{ck}}\text{of}\text{reference}\text{mixture}}{f_{\text{ck}}\text{of}\text{selected}\text{mixture}}$