Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil

Table 2

Pearson correlation matrix for input and output parameters.

	HARHA					AC	δmax	CBR	UCS28	RValue
HARHA	1
	−0.99724	1
	−0.98926	0.991515	1
	−0.99652	0.999411	0.986472	1
	0.201388	−0.1435	−0.17491	−0.1348	1
AC	−0.99388	0.997543	0.984584	0.998142	−0.12039	1
δmax	0.985771	−0.98176	−0.97696	−0.98026	0.23936	−0.97417	1
CBR	0.991609	−0.99425	−0.98026	−0.99514	0.097679	−0.9951	0.969326	1
UCS28	0.990886	−0.99098	−0.97628	−0.99206	0.134931	−0.99283	0.967127	0.996459	1
RValue	0.984407	−0.9721	−0.96953	−0.97003	0.363941	−0.96588	0.972762	0.96009	0.967161	1