Table 4: Stress - Strain results for Phase II.
| Sample |
Cross Section Area cm2 (in2) |
Height cm (in) |
Maximum Capacity |
Ultimate Strain |
| Stress MPa (psi) |
Corresponding Strain (%) |
(%) |
| Base RC |
B-30.25 |
182.39 (28.27) |
76.84 (30.25) |
20.4 (2955) |
1.37 |
2.31 |
| B-30.63 |
182.39 (28.27) |
77.80 (30.63) |
19.9 (2892) |
4.14 |
4.74 |
| 1-Layer HC |
1L-18.25 |
182.39 (28.27) |
46.36 (18.25) |
14.9 (2158) |
3.02 |
4.51 |
| 1L-19 |
182.39 (28.27) |
48.26 (19) |
16.3 (2368) |
8.18 |
9.12 |
| 1L-28 |
182.39 (28.27) |
71.12 (28) |
14.3 (2074) |
1.79 |
2.35 |
| 2-Layer HC |
2L-22.13 |
182.39 (28.27) |
56.2 (22.13) |
21.6 (3139) |
4.26 |
6.38 |
| 2L-30 |
182.39 (28.27) |
76.2 (30) |
16.2 (2351) |
0.66* |
4.87 |
| 3-Layer |
3L-31.25 |
182.39 (28.27) |
79.38 (31.25) |
22.2 (3220) |
1.1 |
14.5 |
| HC |
3L-31 |
182.39 (28.27) |
78.74 (31) |
21.7 (3150) |
1.2 |
10.7 |
| Plain Concrete |
PC1 |
182.39 (28.27) |
30.48 (12) |
8.5 (1232) |
0.69 |
- |
| PC2 |
182.39 (28.27) |
30.48 (12) |
7.9 (1145) |
1.01 |
- |
| Average |
- |
- |
8.2 (1189) |
0.85 |
- |
*max load occurred at the first peak, the second peak was 11.58 MPa (1680 psi) at a strain of 5.75%.