Mechanical and Electrical Characteristics of Graphite Tailing Concrete

Table 4

Compressive strength.

Specimen	W/C	Sand ratio (%)	Tailings content (%)	Carbon fiber content (%)	Compressive strength (N/mm^2)	Standard deviation of compressive strength
1	0.49	30	0	0	43.7	1.315
2	0.49	33	5	0.15	41.2	0.834
3	0.49	36	10	0.30	39.6	0.942
4	0.49	39	15	0.45	31.2	0.994
5	0.54	30	5	0.30	38.5	0.529
6	0.54	33	0	0.45	42.6	1.227
7	0.54	36	15	0	24.9	1.058
8	0.54	39	10	0.15	34.3	0.962
9	0.60	30	10	0.45	32.9	1.183
10	0.60	33	15	0.30	24.3	0.752
11	0.60	36	0	0.15	35	0.617
12	0.60	39	5	0	31.6	0.897
13	0.68	30	15	0.15	20.4	0.825
14	0.68	33	10	0	22.8	0.529
15	0.68	36	5	0.45	30.9	0.776
16	0.68	39	0	0.30	31.3	1.269