Whether to treat or replace rusted rebar in concrete cancer repairs
Concrete cancer treatment has started on our Victorian strata building. The contractor advised that they will only remove and repair areas of concrete that have visibly spalled, even though it appears that all of the reinforcing steel has some level of rust. In several places, rusted rebar ends protrude from the concrete. What level of rust on the reinforcing steel is considered acceptable before it must be exposed, cleaned, and treated, and at what point should the rebar be replaced entirely?