zzolana, and now high performance concrete. It is difficult to imagine any concrete being manufactured and used, which is not intended to perform to the extent; high performance concrete is not a new material of construction. It is difficult to imagine any concrete being manufacture and used, which is not intended to perform. The only difference is the level of performance, which is higher than ordinary. High Performance Lightweight Concrete (HPLC) has been extensively investigated for, among other applications, use in oil drilling platforms in severe environments. The relationships and allowable stresses and the stress block given in structural codes for normal strength concrete (e.g. IS 456 or IRC 21) will require modification. Acceptance testing on site has to be more than cube testing at28 days. Where durability of concrete is the driving force for adoption of high performance concrete, in-situ permeability tests are performed as a matter of routine.