For different coating lengths of the same xA mm
For different coating lengths of the same (20 mm) thickness (Fig. 6a, c, and d), similar damage modes are observed except that NHS-SS-Biotin more transverse cracks occur in longer coatings.
3.2. Axial compressive loading test
Fig. 7 shows the tests while the steel members are under axial compression. To avoid local and overall bucking in the steel members due to initial eccentricity, a mini-column is fabricated from 8 mm thick steel plates as illustrated in Fig. 7a.
Fig. 7. Axial compressive loading test on cementitious material coated steel members: (a) specimen dimension; (b) test setup; (c) coating-steel interfacial cracks; (d) coating peeling off.Figure optionsDownload full-size imageDownload as PowerPoint slide
When the silica average strain in the steel plates reaches approximately 0.2%, coating-steel interfacial cracks appear at top and bottom ends (Fig. 7c), and then propagate towards the centre with further increase of the load. When the steel strain reaches approximately 0.3%, cracks spreads all over the coating-steel interface but without any internal damage in the coatings. Soon after that, the coatings peel off as shown in Fig. 7d.