Experimental Results-Pull Out Tests
Bond Strength Between Steel and concrete
Comparison between Coated Steel
Steel to concrete Bond Strength comparison chart - coated vs uncoated Steel tubes Replacing Rebar ??
Hadi, Alhussainy & Sheikh (2017) proposed using circular small diameter steel tube sections instead of deformed steel bars in reinforcing concrete columns.
Welded steel tubesCircular small diameter steel tube sections used in reinforcing concrete columnsCircular small diameter steel tube sections used in reinforcing concrete columnsBond enhancement and Casing Pipe - impact on drilling performance
Steel casing pipe
A large diameter pipe used to line the borehole and held in place with cement.
The steel pipe casing is subject to axial tension:
- by its dead weight
- by external pressure of the surrounding rock,
- by internal pressure of the fluid purging.
When it is well cemented in place, the drilling process is aided in the following ways:
- Casing sticks the drill string and prevents unstable upper formation from caving in.
- It prevents water well zones contamination.
- It allows smooth internal bore for installing production equipment
- It prevents contamination of production zones and fluid loss.
- It seals off high-pressure zone from the surface
