An image analysis procedure for quantifying the air bubble system in mortar and concrete
Speaker: Priscilla Fonseca, Postdoctoral Research Associate
Series: MMS Brown Bag Seminars
Location: Engineering Quad E219
Date/Time: Tuesday, April 30, 2013, 12:30 p.m. - 1:30 p.m.
The resistance of concrete to frost damage is largely controlled by its air bubble system. This system is characterized by the volume, size, shape, specific surface, frequency, and spacing of the bubbles. These quantities can be estimated by applying the principles of stereology on a statistically representative two-dimensional plane through a sample. This brown bag talk describes an inexpensive and effective procedure to quantify the air bubble system using automatic image analysis. Various materials used for sample preparation are compared and a procedure is recommended to create more accurate images. A stereological analysis method is implemented in the form of a user-friendly and customizable Matlab script. As a result, the user can quantify the air void system in a variety of samples by computing the air content, spacing, and size distribution.