Skip to Main content Skip to Navigation
Journal articles

Kinetic modelling of the thermal decomposition of ettringite into metaettringite

Abstract : Despite recent insights into thermal stability of ettringite and structural changes during decomposition, a lack of knowledge on nucleation and growth mechanisms of metaettringite remained. Therefore, a better understanding of the kinetic modelling of this heterogeneous reaction was proposed. Thanks to an experimental approach allowing to check the validity of kinetic assumptions (rate-determining step, expression of the rate as d alpha/dt=k f(alpha)...), a good agreement was found between the calculated and experimental alpha vs. t and d alpha/dt vs. t kinetic curves. The reaction area of the region in which the rate-limiting step occurs was also elucidated. Finally, we demonstrated that the rate-limiting step of the growth process follows an Arrhenius law in non-isothermal conditions.
Document type :
Journal articles
Complete list of metadata

Cited literature [10 references]  Display  Hide  Download
Contributor : Andrée-Aimée Toucas Connect in order to contact the contributor
Submitted on : Sunday, September 19, 2010 - 9:33:52 PM
Last modification on : Wednesday, August 5, 2020 - 3:45:42 AM
Long-term archiving on: : Monday, December 20, 2010 - 2:23:03 AM


Files produced by the author(s)



Jérémie Pourchez, Françoise Valdivieso, Philippe Grosseau, Alexandre Govin, Bernard Guilhot. Kinetic modelling of the thermal decomposition of ettringite into metaettringite. Cement and Concrete Research, Elsevier, 2006, 36 (11), pp.2054-2060. ⟨10.1016/j.cemconres.2006.06.007⟩. ⟨emse-00449727⟩



Record views


Files downloads