Quantitative analysis of C–S–H in hydrating alite pastes by in-situ XRD

Bergold S, Götz-Neunhoeffer F, Neubauer J (2013)

Publication Language: English

Publication Type: Journal article

Publication year: 2013


Publisher: Elsevier

Pages Range: 119-126

Journal Issue: 53

DOI: 10.1016/j.cemconres.2013.06.001


In this study about the early hydration of monoclinic alite, a method is presented that allows to follow the formation of the Calcium-Silicate-Hydrates directly and quantitatively over time. The combination of the PONKCS method [20] and the G-factor method [6] allowed the refinement and calibration of a C-S-H phase model which can be used for direct quantification of C-S-H in cementitious pastes. The comparison between the heat flow measured by calorimetry and the heat flow calculated from the phase development of C-S-H revealed that C-S-H formation starts later than is indicated by the measured heat flow. It is therefore assumed that the silicate reaction proceeds the following way: A not XRD-detectable C-S-H phase is precipitated which then evolves into a long-range ordered, XRD-detectable C-S-H. This C-S-H acts as a nucleation site for further long-range ordered C-S-H and leads to the acceleration of alite dissolution and direct formation of C-S-H. © 2013 Elsevier Ltd.

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Bergold, S., Götz-Neunhoeffer, F., & Neubauer, J. (2013). Quantitative analysis of C–S–H in hydrating alite pastes by in-situ XRD. Cement and Concrete Research, 53, 119-126. https://dx.doi.org/10.1016/j.cemconres.2013.06.001


Bergold, Sebastian, Friedlinde Götz-Neunhoeffer, and Jürgen Neubauer. "Quantitative analysis of C–S–H in hydrating alite pastes by in-situ XRD." Cement and Concrete Research 53 (2013): 119-126.

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