Mechanically activated alite: New insights into alite hydration

Journal article
(Original article)


Publication Details

Author(s): Bergold ST, Neubauer J, Götz-Neunhoeffer F
Journal: Cement and Concrete Research
Publisher: Elsevier Ltd
Publication year: 2015
Volume: 76
Pages range: 202-211
ISSN: 0008-8846
Language: English


Abstract


For superior understanding of alite hydration an investigation of mechanically activated alite (M3 modification) was performed by XRD and heat flow calorimetry. Activation resulted in reduced particle size, a decreased mean crystallite size and partial amorphization. For the samples of activated alite a significantly accelerated and intensified hydration was observed and complete conversion of alite was found after 24 h. The enthalpy of reaction for crystalline alite was determined to be - 548 J/g from measured heat of hydration after 24 h. The enthalpy of reaction of amorphous "alite" was found to be less exothermic (- 386 J/g). The main hydration period is controlled by nucleation of C-S-H, while the transition from acceleration to deceleration period takes place after consumption of the small alite particles. XRD amorphous C-S-H phase is indicated to precipitate in considerable amount even in the highest activated alite before "long-range ordered", XRD detectable C-S-H was observed.



FAU Authors / FAU Editors

Bergold, Sebastian Tobias
Naturwissenschaftliche Fakultät
Götz-Neunhoeffer, Friedlinde Prof. Dr.
Naturwissenschaftliche Fakultät
Neubauer, Jürgen apl. Prof. Dr.
Lehrstuhl für Mineralogie


How to cite

APA:
Bergold, S.T., Neubauer, J., & Götz-Neunhoeffer, F. (2015). Mechanically activated alite: New insights into alite hydration. Cement and Concrete Research, 76, 202-211. https://dx.doi.org/10.1016/j.cemconres.2015.06.005

MLA:
Bergold, Sebastian Tobias, Jürgen Neubauer, and Friedlinde Götz-Neunhoeffer. "Mechanically activated alite: New insights into alite hydration." Cement and Concrete Research 76 (2015): 202-211.

BibTeX: 

Last updated on 2018-23-11 at 20:50