Inspection, testing and repairs of concrete to coal silos and work tower.
Works carried out:
All surfaces were initially cleaned down with HP Washing.
Cover meter survey to gauge the depth of the current reinforcing bar at spalling locations. Specific ranges were provided and each were to be marked with an alternate color paint.
Phenolphthalein tests conducted on all spalled concrete to determine PH. When the solution is applied it will turn pink if the surface is alkaline. In the the case of a positive reading, the concrete must be broken down until the reading measures negative (clear).
Concrete is then broken out down to rebar, exposing entire rebar surface. Rebar is then cleaned and coated with an anti rust coating and mortar reapplied over.
Sealing coat is applied over entire structure to preserve concrete.