Walao all rusty rebars here.......no proper cover or protection all.....all bars will suffer sectional lost after exposing for one year...

Bro its not the problem of continuing rusting in the concrete, its the problem of is those bars enough capacity not within the design limit. Says the design require 4nos of 20 mm diameter bars in the beams/columns, but after the rusting process left only the rusty 4 nos of 18 mm diameter bars 100%-(18^2/20^2 x 100)=19% losses!!! ....become much insufficient, hard to tell about the real integrity of structure performance later..

Most smart sub cons wont stockpile these rebar in huge quantities due to the cost,just the quantities required and will be installed within short period (prevent rust issue). Some maincon or developers who thought they are smart will buy those steel bar in huge quantities (lower price as economic of scale? Or some great commissions driven)as they are much financially strong. End up tons of rusty bar left rusty onsite for years untill they are required. Thats the fact of our local construction industry, no one to be blamed here..

This post has been edited by sianglee: Sep 6 2015, 02:57 PM