X-RAY IMAGE ANALYSIS OF POROSITY OF PERVIOUS CONCRETES
Keywords:
Porosity, Pervious Concrete, Permeable Pavement, Green Infrastructure, Low Impact DevelopmentAbstract
The use of permeable pavement is one of the most promising tools to control runoff and water
quality, therefore enabling low impact development (LID), along with several other benefits. The porosity of the
permeable pavement is the most important property of the pavement in current state of the practice. In this article,
the porosity of a pervious concrete sample made in laboratory was evaluated by two approaches: measuring
weights and X-ray image analysis. Two different X-ray imaging apparatus, 2D and 3D, were used to construct
cross-sectional planar images of a cylindrical pervious concrete sample. It was found that the porosity estimate
from 2D X-ray was close to the results with measuring weights, but that of 3D X-ray was rather larger under X-
ray imaging configuration and image analysis technique used. The viability of using X-ray images to evaluate
the pore characteristics of permeable pavement, and future applications are discussed.