Details: surface preparation:- the surface should be so prepared to achieve a clean sound surface with a good mechanical key. all substrates should be cleaned and free of dust, plaster, oil, paint, grease, corrosion deposits, and any other deleterious substances. laitence should be removed by mechanical means. oil or greasy deposits should be removed by suitable means. all surfaces so treated should be thoroughly washed with clean water. smooth substrates must be mechanically roughened e.g. by scrabbling, needle gun or grit/ sand blasting to provide a mechanical key. chipping 75mm thk.:-chipping of unsound/weak concrete material from slabs, beams, columns etc. with manual chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all lead and lifts all complete as per direction of engineer-in-cha
Sector: Custom1