Prediction of the Strength of Rubberized Concrete by an Evolved Random Forest Model

Table 1

The input influencing variables in the BRF model.

No.		Influencing variables	Min	Max	Average	Standard deviation
1		Cement (kg/m^3)	131	550	368.1	73.9
2		Water (kg/m^3)	150	225	187.6	24.3
3		^aSCMs (kg/m^3)	0	357.5	71.0	125.3
4		Superplasticizer (%)	0	7.8	1.76	2.9
5		^bCA (kg/m^3)	0	1202.8	999.8	238.3
6		^cCRA (kg/m^3)	0	1160	63.1	186.7
7		^dFA (kg/m^3)	0	942	619.4	165.1
8		^eFRA (kg/m^3)	0	630	49.9	98.3
9		Ages (d)	1	91	26.6	25.7

^aSupplementary cementitious materials; ^bcoarse aggregate; ^cfine aggregate; ^dcoarse rubber aggregate; ^efine rubber aggregate.