Investigation on Effect of Composition on the Drying of Castables with Cement Binder

doi:10.19691/j.cnki.1004-4493.2024.03.005

China's Refractories ›› 2024, Vol. 33 ›› Issue (3): 30-36.DOI: 10.19691/j.cnki.1004-4493.2024.03.005

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Investigation on Effect of Composition on the Drying of Castables with Cement Binder

Bruno TOUZO^1*, Hirotaka GOTO², Uwe KLIPPEL³, Josh SAYRE⁴, Jeff BOGAN⁴

1 Calderys, Paris 75016, France;
2 Calderys, Toyota 470-0308, Japan;
3 Calderys, Neuwied 56564, Germany;
4 HWI, West Mifflin 15122, PA, USA

Online:2024-09-15 Published:2024-10-30
Contact: *e-mail: bruno.touzo@calderys.com
About author:Bruno Touzo received his doctorate degree in Materials Science from the University of Orleans in 1996. After 2 years of postdoctoral studies on cement clinkers at the University of Aberdeen in Scotland, he joined the research center of Lafarge as a research engineer. He then joined a company now owned by Imerys producing refractory cements where he held several positions in R&D and production, in France, USA and China. Since 2020, he is Vice President of Calderys Global Innovation and Technology based in Paris.

Abstract

Abstract: Monolithic refractory castables comprising a hydraulic bond are still used in a vast majority of cases because of their flexibility and robustness, despite many developments for chemical as well as non-cement castable binders. The drying can however be a challenge, in particular for deflocculated dense castables of the low cement castable range. Many publications have been released on this topic for the last ten years, but they often focused on the drying mechanisms or on the addition of drying aids. This paper presents some experimental results on the effect of the composition on the drying properties, especially on the effect of silicon carbide, used for its high thermal conductivity, and on the matrix system. It also introduces two laboratory tests to study and iteratively improve the drying schedule of a given castable lining. The results show that the spalling resistance and the vapor pressure build-up are significantly influenced by the formulation. It is also shown that the castable properties after drying can be altered if the heating rate is very high.

Key words: drying, aggregate composition, binding system, heating rate

Bruno TOUZO, Hirotaka GOTO, Uwe KLIPPEL, Josh SAYRE, Jeff BOGAN. Investigation on Effect of Composition on the Drying of Castables with Cement Binder[J]. China's Refractories, 2024, 33(3): 30-36.

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Investigation on Effect of Composition on the Drying of Castables with Cement Binder

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