The filler joist method of floor slab construction, prevalent in council housing constructed during the 1920’sand 1930’s, entailed encasing steel ‘I‘ section beams within (generally poor quality) concrete containing clinker and brick aggregate. Corrosion of the steel beams, due mainly to the porosity of the concrete, causes cracking.
Vacuum injection, with it’s ability to control resin flow, can successfully be used to encapsulate the steel beams, thus minimising the risk of future corrosion.
New materials are being formulated all the time and there are currently very fine micro grouts available that contain corrosion inhibitors and gelling agents, allowing the beams to be fully encapsulated within the porous clinker concrete.
Coupled to the above Resitech are now able to offer a bespoke Hybrid Cathodic Protection option for increased durability. We would be pleased to visit site to discuss your requirements in detail.