Prediction of Concrete Compressive Strength by Evolutionary Artificial Neural Networks

Table 1

Characteristics of cylindrical samples.

Number	Parameters	Unit	Maximum	Minimum	Standard deviation	Mean
1	Compressive strength of concrete	kg/cm^2	394.00	173.00	54.98	279.27
2	Water-cement ratio	—	0.50	0.24	0.19	0.43
3	Maximum size of sand	mm	50.00	5.12	14.25	23.89
4	Gravel	kg	1050.00	559.00	95.71	779.13
5	Cement	kg	549.00	243.00	72.70	385.55
6	Sand 3/8	kg	523.00	303.00	64.45	427.05
7	Sand 3/4	kg	693.00	365.00	90.06	563.31
8	Coefficient of soft sand	—	9.20	2.40	1.30	3.27