Table 4

Correlation coefficients

Normalisation methodLimeFly ashCementGypsumOrder of impact on UCS
Initialisation0.8910.8350.9100.790Cement > lime > fly ash > gypsum
Average0.8420.7870.8150.746Lime > cement > fly ash > gypsum
Range0.6090.5950.7570.707Cement > gypsum > lime > fly ash
Minimisation0.7000.6210.7230.569Cement > lime > fly ash > gypsum

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