The application of focused ion beam-scanning electron microscopy (FIB-SEM) in materials science is a powerful tool for high-resolution three-dimensional imaging. However, similar to biological specimens, the use of FIB-SEM in combination with energy-dispersive X-ray spectroscopy (EDX) on water-containing…
To accurately simulate the hydration process of cementitious materials, understanding the growth rate of C-S-H layers around clinker grains is crucial. Nonetheless, the thickness of the hydrate layer shows substantial variation around individual grains, depending on their surrounding. Consequently, it…
This study combines 2D element mappings which allows a more detailed analysis of clinker phase composition by using the advantages of both methods. One mapping is obtained by laser ablation with inductively coupled plasma mass spectrometry (LA-ICP-MS), providing very good results for minor and trace…
The demands on modern building materials are constantly increasing. Innovative solutions produce a multitude of binders and concretes that often have a very complex, multiscale heterogeneous composition. Multi-scale imaging of structural characteristics is still a challenge but will provide basic understanding…
This study demonstrates the application and combination of multiple imaging techniques [light microscopy, micro-X-ray computer tomography (μ-CT), scanning electron microscopy (SEM) and focussed ion beam – nano-tomography (FIB-nT)] to the analysis of the microstructure of hydrated alite across multiple…
Burning of clinker is the most influencing step of cement quality during the production process. Appropriate characterisation for quality control and decision-making is therefore the critical point to maintain a stable production but also for the development of alternative cements. Scanning electron…
The exploration of cementitious materials using scanning electron microscopes (SEM) is mainly done using fractured or polished surfaces. This leads to high-resolution 2D-images that can be combined using EDX and EBSD to unveil details of the microstructure and composition of materials. Nevertheless,…
Chemical glass frosting processes are widely used to create visual attractive glass surfaces. A commonly used frosting bath mainly contains ammonium bifluoride (NH4HF2) mixed with hydrochloric acid (HCl). The frosting process consists of several baths. Firstly, the preliminary bath to clean the object.…
Sichtbeton ist aufgrund seiner Vielfältigkeit in der Formgebung eines der am meisten verbreiteten Gestaltungsmittel der modernen Architektur und optimal für neue Bauweisen sowie steigende Anforderungen an das Erscheinungsbild öffentlicher Bauwerke geeignet. Die Herstellung qualitativ hochwertiger Sichtbetonoberflächen…
Erschienen: Gesellschaft Deutscher Chemiker, 2019-09-30
Zur Erstellung von dekorativen Plastiken sollten Mörtel entwickelt werden, die eine hohe Biegezugfestigkeit aufweisen und eine breite Palette von Konsistenzen für verschiedene Anwendungsarten, wie Gießen, Spachteln oder Stampfen abdecken. Als Basis für die Rezepturen wurde ein niedrigviskoses Epoxidharzsystem…
Erschienen: Gesellschaft Deutscher Chemiker, 2017-09-18
Mit dem stetigen Steigen des Anteils an erneuerbaren Energien wird der Einsatz von Speichern immer bedeutsamer. Neben der Speicherung elektrischer Energie ist die Speicherung anfallender solarer bzw. industrieller Wärme eine wichtige Herausforderung. Aufgrund der hohen Energiespeicherdichte kommt dabei…