Table 4 Samples’ matrix
From: Improving Bond Performance of Near-Surface Mounted Steel Ribbed and Threated Rods in the Concrete
Specimen ID | Bar type | Filling material | La (times diameter) | db (mm) | Groove size | Description |
|---|---|---|---|---|---|---|
R7ØN | Ribbed | Substrate normal concrete | 7Ø | 9.5 | N/A | Ribbed bar embedded in normal concrete before casting (La = 7Ø) |
R10ØN | Ribbed | Substrate normal concrete | 10Ø | 9.5 | N/A | Ribbed bar embedded in normal concrete before casting (La = 10Ø) |
R15ØN | Ribbed | Substrate normal concrete | 15Ø | 9.5 | N/A | Ribbed bar embedded in normal concrete before casting (La = 15Ø) |
R7ØE | Ribbed | Epoxy | 7Ø | 9.5 | 20 × 20 mm | NSM ribbed bar (La = 7Ø) |
R10ØE | Ribbed | Epoxy | 10Ø | 9.5 | NSM ribbed bar (La = 10Ø) | |
R15ØE | Ribbed | Epoxy | 15Ø | 9.5 | NSM ribbed bar (La = 15Ø) | |
S7ØE | Screw | Epoxy | 7Ø | 10 | NSM screw bar (La = 7Ø) | |
S0 (Control) | Screw | Epoxy | 5Ø | 10 | NSM screw bar (La = 5Ø) | |
S-1n5 | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Nut 5 mm) | |
S-2n5 | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Two nuts 5 mm) | |
S-1n10 | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Nut 10 mm) | |
S-1r | Screw | Epoxy | 5Ø | 10 | NSM screw bar (One ring wire 2 mm) | |
S-2r | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Two rings wire 2 mm) | |
S-3r | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Three rings wire 2 mm) | |
S-2b | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Two longitudinal bar 2 mm along La) | |
S-3b | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Three longitudinal bar 2 mm along La) | |
S-4b | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Four longitudinal bar 2 mm along La) | |
S-1s | Screw | Epoxy | 5Ø | 10 | NSM screw bar (one spiral wire 2 mm one loop and pitch = 50 mm = La) | |
S-2s | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Two spiral wire 2 mm two loop and pitch = 25 mm = La/2) | |
S-3s | Screw | Epoxy | 5Ø | 10 | NSM screw bar (Three spiral wire 2 mm three loops and pitch = 16.7 mm = La/3) |