Concrete Problems
Definitions:
- Alkaline: Having a PH of 7 or greater
- Segregation: When aggregates separate in concrete
Introduction
Like any material, concrete can run into a number of problems. These are typically from improper mix makeup, or materials within the concrete. Certain environments such as salt and humidity can exacerbate these problems.
Concrete Problems
Most of the problems we are familiar with and experience are aesthetic ones, since they are most obvious and exposed. There are other much more important problems which can affect the internal composition and strength of the concrete, as well as issues which may not affect the concrete but can affect coatings and other materials that touch the concrete.
Aesthetic
Honeycombing
The formation of air pockets next to forms. Smaller honeycombing will not affect the strength significantly, however, larger pockets can cause rebar to be exposed and not provide enough strength in the mass. Common when aggregates are too large and the concrete is not properly vibrated into forms.