Research Article
Nondestructive Wireless Monitoring of Early-Age Concrete Strength Gain Using an Innovative Electromechanical Impedance Sensing System
Table 2
Calculation procedure of
_
index according to Eurocode (EC2) formula (
4).
| |
(Hours) | |
| (MPa)
formula (4) | |
| _ |
| | 1 | 3.00 | 0.00 | 0.00 | 0.30 | 0.00 | 0.00 | 0.000 | | 2 | 6.00 | 3.00 | 3.00 | 1.20 | 0.90 | 0.90 | 0.300 | | 3 | 9.00 | 3.00 | 6.00 | 2.22 | 1.02 | 1.92 | 0.320 | | 4 | 12.00 | 3.00 | 9.00 | 3.20 | 0.98 | 2.90 | 0.323 | | 5 | 15.00 | 3.00 | 12.00 | 4.11 | 0.91 | 3.81 | 0.318 | | 6 | 18.00 | 3.00 | 15.00 | 4.95 | 0.84 | 4.65 | 0.310 | | 7 | 21.00 | 3.00 | 18.00 | 5.71 | 0.76 | 5.41 | 0.301 | | 8 | 24.00 | 3.00 | 21.00 | 6.41 | 0.70 | 6.12 | 0.291 |
|
|
