Early stage hydration properties of calcium aluminosilicate slag

DOI

10.2991/icadme-16.2016.6How to use a DOI?

Keywords

Calcium aluminosilicate slag; High ferrous bauxite; Hydration properties

Abstract

The calcium aluminosilicate slag cement clinker was prepared from bauxite-coal composite pellets by high temperature reduction and smelting process. The hydration results show that, after hydration for 28 days, the hydration products of calcium aluminosilicate slag are mainly composed of killalaite (Ca3.2(H0.6Si2O7)(OH)), calcium silicate hydrate (Ca1.5SiO3.5·xH2O) and calcium aluminates hydroxid (3CaO·Al2O3·Ca(OH)2·18·H2O, Ca12Al13.86Fe0.14(OH)2). With the increase of w(CaO)/w(SiO2) ratio, the killalaite disappeared, the 3CaO·Al2O3·Ca(OH)2·18·H2O and Ca12Al13.86Fe0.14(OH)2 amounts were increased gradually as a function of w(CaO)/w(SiO2) ratio. The C3A and C12A7 have very exothermic hydration characteristic and faster hydration rate, promoted the hydration activity of -C2S. The calcium aluminosilicate slag cement clinker has a higher reactivity during the early stage of the hydration process.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Y.Y. Zhang
AU  - Y.H. Qi
AU  - Z.S. Zou
PY  - 2017/07
DA  - 2017/07
TI  - Early stage hydration properties of calcium aluminosilicate slag
BT  - Proceedings of the 2016 6th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2017)
PB  - Atlantis Press
SP  - 32
EP  - 38
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-16.2016.6
DO  - 10.2991/icadme-16.2016.6
ID  - Zhang2017/07
ER  -