Table 7: Specimen details.

Specimen labelNet span (mm)Groove dimension width × height (mm2)Material specificationGroove spacing (mm)Reinforcement ratios

B-127000000
GB-1270012 × 205C6600.254%
GB-2270012 × 245C6600.254%
GB-3270016 × 205C6560.254%
GB-4270016 × 245C6560.254%
GB-5270016 × 245C8560.449%
GB-6270016 × 247C8350.629%
CB-1270012 × 202A61400.101%
CB-2270012 × 203A6950.151%
CB-3270012 × 204A6720.202%

Note. GB-1–6: NSM screw-thread steels; CB-1–3: NSM CFRP bars.