First, methods for characterization and assessment of ASR risks and reaction products used at BAM are explained and classified in the international context. The publication aims to illustrate the interdisciplinary research of the German Federal Institute for Materials Research and Testing (BAM) within the last 20 years, considering all aspects of ASR topics from the macro to the micro level. Due to the complexity of the problem, it still causes damage to concrete constructions worldwide. In particular, it enables Pawley refinement of powder diffraction data and size–strain analysis.Īlkali‐silica reaction (ASR) is a chemical reaction within concrete which can lead over time to cracking and spalling. It specializes in fitting a sum of bell-shaped functions to experimental data. Fityk is portable, open-source software for nonlinear curve fitting and data analysis. The journal is the primary place where crystallographic computer program information is published. Developments of instrumentation and crystallo-graphic apparatus, theory and interpretation, numerical analysis and other related sub-jects are also covered. Articles published in the Journal of Applied Crys-tallography focus on these methods and their use in identifying structural and diffusion-controlled phase transformations, structure–property relationships, structural changes of defects, interfaces and surfaces, etc. For further information see Many research topics in condensed matter research, materials science and the life sci-ences make use of crystallographic methods to study crystalline and non-crystalline mat-ter with neutrons, X-rays and electrons. Republication of this article or its storage in electronic databases other than as specified above is not permitted without prior permission in writing from the IUCr. Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained.
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