Table 7.

Results predicted by the artificial neural networks (ANN) during the validation procedure.

Testing Dataset	Network 2-11-15-1 for Density			Network 2-11-15-1 for Porosity			Network 2-11-15-1 for Strength
	Lab. Test	ANN	Relative Error [%]	Lab. Test	ANN	Relative Error [%]	Lab. Test	ANN	Relative Error [%]
1 dataset (Lab. test LWC 14,15)	1060	1005.31	−5.16	19.03	18.773	−2.73	6.37	5.476	−14.04
	1002	976.03	−2.59	15.2	17.397	−14.45	6.86	5.933	−13.52
2 dataset (Lab. test LWC 3,7)	1177	1132.83	−3.75	16.0	18.126	13.28	13.43	15.091	12.37
	1058	977.27	−7.63	27.4	30.276	10.49	4.29	4.799	11.86
3 dataset (Lab. test LWC 9,11)	929	948.78	2.13	65.9	59.937	−9.05	4.21	4.778	13.49
	1041	1020.21	−1.99	20.1	21.086	4.91	6.99	7.689	10.01
4 dataset (Lab. test LWC 1,5)	1560	1339.91	−14.11	20.8	19.959	−4.04	18.65	21.601	15.82
	1078	987.66	−8.38	67.0	57.772	−13.77	12.49	13.627	9.11
5 dataset (Lab. test LWC 6,12)	1028	1062.04	3.31	45.0	50.97	13.27	4.59	4.126	−10.11
	1059	1073.93	1.41	36.6	33.278	−9.08	5.38	4.743	−11.84
6 dataset (Lab. test LWC 5,11)	1078	1044.83	−3.08	67.0	75.317	12.41	12.49	11.322	−9.36
	1041	923.08	−11.33	20.1	22.982	14.34	6.99	6.169	−11.75
7 dataset (Lab. test LWC 2,13)	1378	1477.18	7.19	17.7	18.512	4.59	21.35	18.351	−14.05
	1304	1429.97	9.66	25.6	29.21	14.1	8.92	10.125	13.51
8 dataset (Lab. test LWC 6,10)	1028	1008.79	−1.87	45.0	52.077	15.73	4.59	4.099	−10.71
	903	990.43	9.68	26.4	22.641	−14.24	5.44	4.654	−14.46
9 dataset (Lab. test LWC 1,2)	1560	1307.31	−16.19	20.8	17.937	−13.76	18.65	18.026	−3.35
	1378	1305.18	−5.13	17.7	17.829	0.73	21.35	22.068	3.36
10 dataset (Lab. test LWC 5,9)	1078	1003.46	−6.91	67.0	64.153	−4.25	12.49	10.658	−14.67
	929	983.25	5.84	65.9	65.008	−1.35	4.21	4.633	10.05