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Ruan, S., Kastiukas, G., Liang, S., & Zhou, X. (2020). Influence of Early Oven Curing on the Alkali Activated Binders with Reactive Magnesia Replacement. KnE Engineering, 5(4), 207–214. https://doi.org/10.18502/keg.v5i4.6811

https://doi.org/10.18502/keg.v5i4.6811

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authors

  • Shaoqin Ruan

    Shaoqin Ruan

    Department of Civil and Environmental Engineering, Brunel University London, Kingston Ln, London, Uxbridge UB8 3PH, United Kingdom
  • Gediminas Kastiukas

    Gediminas Kastiukas

    Department of Civil and Environmental Engineering, Brunel University London, Kingston Ln, London, Uxbridge UB8 3PH, United Kingdom
  • Shuang Liang

    Shuang Liang

    Department of Civil and Environmental Engineering, Brunel University London, Kingston Ln, London, Uxbridge UB8 3PH, United Kingdom
  • Xiangming Zhou

    Xiangming Zhou

    Department of Civil and Environmental Engineering, Brunel University London, Kingston Ln, London, Uxbridge UB8 3PH, United Kingdom

Published Date

  • Apr 13, 2020

Influence of Early Oven Curing on the Alkali Activated Binders with Reactive Magnesia Replacement

KnE Engineering / REMINE International Conference on Valorization of Mining and Industrial Wastes into Construction Materials By Alkali-activation / Pages 207–214

Abstract

Magnesia is widely used an expansive agent in construction materials due to its delayed hydration, which will compensate for the thermal shrinkage. This study investigates the influence of magnesia and early oven curing on the mechanical performance and microstructures of alkali-activated natural clay samples under different curing regimes after 28 days. Microstructural analysis and pH measurements were conducted to assess the strength of the samples. Results indicate that the strength was greatly improved (in comparison with the control samples) by the incorporation of magnesia due to the formation of nesquehonite. Meanwhile, oven curing is an effective method in the fast strength development in alkali-activated natural clay. The results also demonstrated the possibility of CO2 curing in the strength development of the magnesia-modified alkali-activated natural clay.


Keywords: magnesia, natural clay, oven curing, compressive strength, microstructure

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