Sunday, February 6, 2011

#2 Crumbling Infrastructure

Description: A perfect example of the crumbling infrastructure we all hear about in the media.  The problem with this bridge pier is obvious to any civil engineer, but may be not understood from a simple look.  The problem is the fact that the reinforcing steel (rebar) is exposed to the elements and is rusting.  The rebar takes all tension loads, prevents shrinkage of the concrete, and provides shear resistance.  When the rebar rusts strength is lost and the ability of the bridge pier to perform its job in supporting to above roadway is compromised.