Substituting Slag with Calcined Clay for Mitigation of Conversion in Calcium Aluminate Cement
SSRN, ISSN: 1556-5068
2024
- 68Usage
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Article Description
Calcium aluminate cement is used for a specific niche market where resistance to aggressive environment is needed. Blast furnace slag is most often used to inhibit conversion process of calcium aluminate cement. Moreover, by using slag in combination with calcium aluminate cement carbon footprint of cement can be reduced. Due to the challenges with the availability and costs of slag, there is a need to investigate other possible supplementary cementitious materials. In this study, calcined clay found regionally available, with medium kaolin content was used. The conversion process was accelerated using curing at high temperature. The evaluation of conversion process was tested through compressive strength development. Simultaneously, changes in reaction products and pore structure were analysed. Results show that by the addition of calcined clay to calcium aluminate cement stratlingite hydrate is formed which densifies the structure and inhibits conversion process.
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