Mechanical Behavior of Reactive Powder Concrete Subjected to Biaxial Loading

Table 3

Strength of RPC specimens under compression-compression.

Nominal strain ratio, k = ε2/ε3	Specimen	Stress ratio, α = σ2c/σ3c	σ2c (MPa)	σ3c (MPa)			σ3c (predicted) (MPa)
Uniaxial compression	1	0.00	0.00	−86.7	0.00	1.07	−81.0
	2	0.00	0.00	−74.7	0.00	0.92	−81.0
	3	0.00	0.00	−82.5	0.00	1.02	−81.0
	Average	0.00	0.00	−81.3	0.00	1.00	−81.0
	Standard deviation	—	—	6.1	—	—	—
	Coefficient of variation	—	—	−0.07	—	—	—
0.4	1	0.40	−50.9	−125.9	0.63	1.55	−120.4
	2	0.42	−54.1	−128.3	0.67	1.58	−120.8
	3	0.45	−44.1	−98.6	0.54	1.22	−119.0
	Average	0.42	−49.7	−117.6	0.61	1.45	−120.2
	Standard deviation	—	5.1	16.5	—	—	—
	Coefficient of variation	—	−0.10	−0.14	—	—	—
0.6	1	0.39	−46.9	−121.7	0.58	1.50	−119.6
	2	0.50	−54.8	−110.1	0.68	1.36	−120.9
	3	0.46	−55.3	−119.2	0.68	1.47	−121.0
	Average	0.45	−52.3	−117.0	0.65	1.44	−120.6
	Standard deviation	—	4.7	6.10	—	—	—
	Coefficient of variation	—	−0.09	−0.05	—	—	—
0.8	1	0.55	−82.3	−149.7	1.02	1.85	−121.4
	2	0.79	−107.1	−135.4	1.32	1.67	−118.3
	3	0.81	−80.8	−100.0	1.00	1.23	−121.5
	Average	0.72	−90.0	−128.4	1.11	1.58	−120.7
	Standard deviation	—	14.8	25.5	—	—	—
	Coefficient of variation	—	−0.16	−0.20	—	—	—
1.0	1	0.69	−82.9	−120.9	1.02	1.49	−121.4
	2	0.87	−97.5	−111.7	1.20	1.38	−119.8
	3	0.74	−92.2	−124.6	1.14	1.54	−120.5
	Average	0.76	−90.9	−119.1	1.12	1.47	−120.6
	Standard deviation	—	7.4	6.7	—	—	—
	Coefficient of variation	—	−0.08	−0.06	—	—	—