![]() To reflect the multi-phase characteristics of hydrating cement composite, a discretized multi-phase microstructural model of cement composite during the progression of hydration is developed. mono-phase Tri-calcium Silicate (C3S), Di-calcium Silicate (C2S) and Calcium-Silicate-Hydrate (CSH) individually), bi-phase (C3S-CSH, C2S-CSH) and multi-phase (more than 10 individual phases including water pores). First, numerical nanoindentation using nonlinear contact mechanics is carried out on three different phase compositions of cement paste, viz. Properties and distribution of the products formed during the hydration of cementitious composite at the microlevel are investigated using a nanoindentation technique. In addition, statistical evaluation of the data is implemented within the tool to reveal whether the imaged area is representative for all clinker phases. Results show that this tool can be applied to segment sub-micron scale clinker phases and to get a quantification of all phase fractions. ![]() Therefore, a tool for image analysis was developed that uses state-of-the-art algorithms for pixel-wise image segmentation and labeling in combination with a decision tree that allows searching for specific clinker phases. The contribution aims to provide an overview of phase fraction quantification by semi-automatic phase segmentation using high-resolution backscattered electron (BSE) images and lower-resolved EDX element maps. This data can be used to quantify phase fractions and chemical composition of identified phases. Scanning electron microscopy (SEM) in combination with energy dispersive X-ray spectroscopy (EDX) delivers spatially resolved phase and chemical information for cement clinker. Appropriate characterization for quality control and decision making is therefore the critical point to maintain a stable production but also for the development of alternative cements. Burning of clinker is the most influencing step of cement quality during the production process.
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