Ghazizadeh, S;
Hanein, T;
Provis, JL;
Matschei, T;
(2020)
Estimation of standard molar entropy of cement hydrates and clinker minerals.
Cement and Concrete Research
, 136
, Article 106188. 10.1016/j.cemconres.2020.106188.
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Abstract
It is not straightforward to experimentally measure the standard molar entropy of cement hydrates or clinker minerals. This is further compounded by the controversies surrounding the entropy values reported in established thermodynamic datasets for cements. The purpose of this study is to assess the reliability of standard entropies compiled in those datasets. To this end, a simple but robust method is used in which the standard entropy of an inorganic solid is correlated to its formula unit volume via a linear equation. The results of this analysis show that the standard entropies and/or molar volumes (and in cases solubility products) of the following phases deserve closer scrutiny: meta-ettringite phases; magnesium/aluminium layered double hydroxide solid solutions; almost all iron-bearing monosulfate and hydrogarnet phases; and several calcium silicate hydrate solid solution end-members. In addition, this study reports the provisional estimates for the standard entropies of minerals ternesite and ye'elimite.
| Type: | Article |
|---|---|
| Title: | Estimation of standard molar entropy of cement hydrates and clinker minerals |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cemconres.2020.106188 |
| Publisher version: | https://doi.org/10.1016/j.cemconres.2020.106188 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Thermodynamic, Standard entropy, Cement |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10136512 |
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