skip to main content

Title: Applying high resolution SyXRD analysis on sulfate attacked concrete field samples

High resolution synchrotron X-ray diffraction (SyXRD) was applied for a microstructural profile analysis of concrete deterioration after sulfate attack. The cement matrices consist of ordinary Portland cement and different amounts of supplementary cementitious materials, such as fly ash, natural pozzolana and granulated blast furnace slag. The changes of the phase composition were determined along the direction of sulfate ingress. This approach allows the identification of reaction fronts and zones of different phase compositions and conclusions about the mechanisms of sulfate attack. Two reaction fronts were localized in the initial 4 mm from the sample surface. The mechanism of deterioration caused by the exposition in the sulfate-bearing soil is discussed. SyXRD is shown to be a reliable method for investigation of cementitious materials with aggregates embedded in natural environments.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1]
  1. BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Straße 11, 12489 Berlin (Germany)
  2. (HZB), Hahn-Meitner-Platz 1, 14109 Berlin (Germany)
  3. Department of Civil Engineering, National University of Buenos Aires Center State, Avenida Del Valle 5737, B7400JWI Olavarría (Argentina)
Publication Date:
OSTI Identifier:
22395931
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 66; 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; BLAST FURNACES; CONCRETES; MICROSTRUCTURE; PORTLAND CEMENT; SLAGS; SOILS; SULFATES; SYNCHROTRONS; X-RAY DIFFRACTION