Oral Presentation International Conference on Tomography of Materials & Structures

Characterization of alkali-silica reaction damage in concrete by X-ray tomography (51)

Mahdieh Shakoorioskooie 1 2 , Andreas Leemann 1 , Michele Griffa 1 , Robert Zboray 1 , Pietro Lura 1 2
  1. Empa, Swiss Federal Laboratories for Materials Science and Technology, CH 8600, Dübendorf, Switzerland
  2. Institute for Building Materials (IfB), ETH Zurich, Hönggerberg , 8093 Zürich , Switzerland

The alkali-silica reaction (ASR) is a chemical reaction between the alkaline pore solution in concrete and its aggregates, mainly those rich in silicates. The ASR products can lead to a significant amount of cracking upon swelling due to pore solution uptake. The aggregate swelling leads first to aggregate cracking, then to crack propagation through the mortar matrix. We present an overview of how X-ray tomography and respective 3D image analysis allow investigating the ASR damage temporal evolution.



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