skip to main content

SciTech ConnectSciTech Connect

Title: Application of micro X-ray diffraction to investigate the reaction products formed by the alkali silica reaction in concrete structures

Alkali–silica reaction (ASR) is one of the most important deterioration mechanisms in concrete leading to substantial damages of structures worldwide. Synchrotron-based micro-X-ray diffraction (micro-XRD) was employed to characterize the mineral phases formed in micro-cracks of concrete aggregates as a consequence of ASR. This particular high spatial resolution technique enables to directly gain structural information on ASR products formed in a 40-year old motorway bridge damaged due to ASR. Micro-X-ray-fluorescence was applied on thin sections to locate the reaction products formed in veins within concrete aggregates. Micro-XRD pattern were collected at selected points of interest along a vein by rotating the sample. Rietveld refinement determined the structure of the ASR product consisting of a new layered framework similar to mountainite and rhodesite. Furthermore, it is conceivable that understanding the structure of the ASR product may help developing new technical treatments inhibiting ASR.
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [1] ;  [5]
  1. Paul Scherrer Inst., Villigen (Switzerland)
  2. Phase Solutions Ltd., Lausanne (Switzerland)
  3. European Synchrotron Radiation Facility (ESRF), Grenoble (France); Ecole Ploytechnique Federale de Lausanne (Switzerland)
  4. Phase Solutions Ltd., Lausanne (Switzerland); Ecole Ploytechnique Federale de Lausanne (Switzerland)
  5. Empa-Swiss Laboratories for Materials Science and Technology, Dubendorf (Switzerland)
Publication Date:
OSTI Identifier:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement Concrete Res.; Journal Volume: 79; Journal Issue: 01
Research Org:
Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
Sponsoring Org:
Country of Publication:
United States