skip to main content

Title: Electrical resistance tomography to monitor unsaturated moisture flow in cementitious materials

Traditionally the electrically-based assessment of the moisture flow in cement-based materials relies on two- or four-point measurements. In this paper, imaging of moisture distribution with electrical resistance tomography (ERT) is considered. Especially, the aim is to study whether ERT could give information on unsaturated moisture flows in cases where the flow is non-uniform. In the experiment, the specimens are monitored with ERT during the water ingress. The ERT reconstructions are compared with neutron radiographs, which provide high resolution information on the 2D distribution of the moisture. The results indicate that ERT is able to detect the moisture movement and to show approximately the shape and position of the water front even if the flow is nonuniform.
Authors:
 [1] ;  [2] ;  [1]
  1. Department of Civil Construction and Environmental Engineering, North Carolina State University, Raleigh, NC 27695 (United States)
  2. Department of Applied Physics, University of Eastern Finland, Kuopio (Finland)
Publication Date:
OSTI Identifier:
22475491
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 69; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CEMENTS; COMPARATIVE EVALUATIONS; CONCRETES; ELECTRIC CONDUCTIVITY; IMAGE PROCESSING; IMAGES; MOISTURE; NEUTRON RADIOGRAPHY; RESOLUTION; TOMOGRAPHY; WATER