Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9817480 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2005 | 5 Pages |
Abstract
Analyses of materials with ion beams have proven to be a valuable technique for describing the spatial distributions of specific elements in host materials. We have applied this technique using the 15N(p, αγ)12C reaction to study the time dependence of the chemical reactions involved in the curing of cement. By using the Dynamitron Tandem accelerator at the Ruhr Universität, Bochum, Germany, we have been able to achieve a few nanometer spatial resolution at the surface of cement grains and to study the hydrogen distributions to a depth of about 2 μm. By applying a technique for stopping the chemical reactions at arbitrary times, the time dependence of the chemical reactions involving specific components of cement can be investigated. In addition, the effects of additives on the chemical reactions have been studied, as have materials that are components of concrete.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Jeffrey S. Schweitzer, Richard A. Livingston, Claus Rolfs, Hans-Werner Becker, Stefan Kubsky, Timothy Spillane, Marta Castellote, Paloma G. de Viedma,