Title:
Accelerated Diffusion Testing of Concrete with X-Ray Imaging
Author(s):
Parastegari
Publication:
Web Session
Volume:
ws_F23_Parastegari.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
The apparent diffusion coefficient (Dic) is a vital parameter in modeling the service life and quality of concrete mixtures. Most diffusion-based tests require the sample to be ponded for at least 28 days and they require significant labor to measure. This presentation will present a novel test method to determine the Dic in 8 h of ponding time and five minutes of technician time. The test uses a dental X-ray scanner modified to image the ions penetrating the concrete. The presentation will present the method, and how the method has been adapted for concrete, and then will present an accelerated diffusion test that uses a charge potential to move ions within the concrete. This accelerated test method has been shown to correlate with typical diffusion measurements directly. Details are shown in Figure 1. This work has the potential to increase the widespread use of diffusion coefficients usage by making the important parameter easier to measure.