2026-05-30T01:48:12Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/180212026-02-03T11:03:39Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Segata, Monica
author
Marinoni, Nicoletta
author
Galimberti, Matteo
author
Marchi, Maurizio
author
Cantaluppi, Marco
author
Pavese, Alessandro
author
Gómez-de-la-Torre, María de los Ángeles
2019-07-11T10:10:26Z
2019-07-11T10:10:26Z
2019-07-02
https://hdl.handle.net/10630/18021
10.1016/j.matchar.2019.109809
The present investigation deals with how minor elements (their oxides: MgO, Na2O and SO3) in industrial kiln
feeds affect (i) chemical reactions upon clinkering, (ii) resulting phase composition and microstructure of
clinker, (iii) hydration process during cement production.
Our results show that all these points are remarkably sensitive to the combination and interference effects
between the minor chemical species mentioned above.
Upon clinkering, all the industrial raw meals here used exhibit the same formation temperature and amount
of liquid phase. Minor elements are preferentially hosted by secondary phases, such as periclase. Conversely, the
growth rate of the main clinker phases (alite and belite) is significantly affected by the nature and combination
of minor oxides. MgO and Na2O give a very fast C3S formation rate at T > 1450 K, whereas Na2O and SO3 boost
C2S
After heating, if SO3 occurs in combination with MgO and/or Na2O, it does not inihibit the C3S crystallisation
as expected. Rather, it promotes the stabilisation of M1-C3S, thus indirectly influencing the aluminate content,
too. MgO increseases the C3S amount and promotes the stabilisation of M3-C3S, when it is in combination with
Na2O. Na2O seems to be mainly hosted by calcium aluminate structure, but it does not induce the stabilisation of
the orhtorhombic polymorph, as supposed to occur. Such features play a key role in predicting the physicalmechanical
performance of a final cement (i.e. rate of hydration and hardening) when used as a bulding material.
spa
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
The effects of MgO, Na2O and SO3 on industrial clinkering process: phase composition, polymorphism, microstructure and hydration, using a multidisciplinary approach
journal article
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URL
https://riuma.uma.es/bitstreams/3baafb10-b211-4bb3-8fea-5a7bfd824274/download
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