Optimization of Arabian-Shield-Based Natural Pozzolan and Silica Fume for High-Performance Concrete Using Statistical Design of Experiments

Table 4

Summary of the experimental results of concrete mixtures.

Mix no.	Compressive strength (MPa)					Permeability (charge passed, coulombs)					Class of permeability (ASTM C1202)
	Test run no.			Mean	Std. Dev.	Test run no.			Mean	Std. Dev.
	1	2	3			1	2	3
1	82.3	82.8	—	82.6	0.35	1877	2045	1928	1950	86.13	Low
2	94.1	106.9	99.7	100.2	6.42	220	211	219	217	4.93	Very low
3	98.9	90.1	92.8	93.9	4.51	215	197	—	207	12.73	Very low
4	91.4	92.4	89.4	91.1	1.53	2445	1852	1990	2096	310.30	Moderate
5	90.9	94.0	88.7	91.2	2.66	2478	2773	2953	2735	239.81	Moderate
6	90.1	85.5	81.4	85.7	4.35	3098	2959	2477	2845	325.91	Moderate
7	92.7	98.3	89.2	93.4	4.59	195	187	195	192	4.62	Very low
8	88.3	92.6	84.8	88.6	3.91	75	74	—	75	0.71	Negligible
9	94.6	89.9	93.8	92.8	2.51	205	182	174	187	16.09	Very low
10	101.7	100.2	—	101.0	1.06	24	26	—	25	1.41	Negligible
11	89.6	87.8	91.6	89.7	1.90	51	39	—	45	8.49	Negligible
12	85.2	95.6	90.6	90.5	5.20	71	63	—	67	5.66	Negligible
13	69.5	71.8	74.2	71.8	2.35	4182	4341	3988	4170	176.79	High
14	73.0	61.1	68.5	67.5	6.01	799	957	873	876	79.05	Very low
15	78.8	83.7	86.4	83.0	3.85	894	780	833	835	57.05	Very low
16	62.1	59.8	60.6	60.8	1.17	6259	5346	6003	5869	470.95	High
17	53.6	58.6	57.9	56.7	2.71	7087	6654	5532	6424	802.54	High
18	50.4	50.1	—	50.3	0.21	6319	7298	6482	6700	524.54	High
19	62.8	65.2	67.6	65.2	2.40	807	909	795	837	62.64	Very low
20	62.0	62.5	—	62.3	0.35	269	261	252	261	8.50	Very low
21	56.2	56.1	—	56.2	0.07	939	781	983	901	106.23	Very low
22	63.7	69.2	68.4	67.1	2.97	101	131	—	116	21.21	Very low
23	63.7	65.1	69.7	66.2	3.14	186	141	—	164	31.82	Very low
24	60.2	65.2	58.6	61.3	3.44	319	277	—	298	29.70	Very low

Standard Deviation.