As the civil engineering works, have to use things to reinforce concrete nowadays mostly use steel to reinforce. When we use thing to reinforce the construction it will get bending and bended in angle. In this lab we test the steel by give it bending in angle and study its changing and failure it occur.
From this lab, we give load at the middle of steel RB 9, DB 12 to bend it into 180° and DB16 into 90° . If the steel that we test have quality that can pass the standard, it will not have any crack after bend it.
From the result, all the steel that we test have passed the standard that can use in civil engineering because it is no crack in any angle and radius.