Surface effects of molten slag spills on calcium aluminate cement paste

Journal article (2022)

Authors

F. França de Mendonça Filho Materials and Environment - CEG
C. Romero Rodriguez Materials and Environment - CEG
E. Schlangen Materials and Environment - CEG
Oguzhan Copuroglu Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2022 F. França de Mendonça Filho, C. Romero Rodriguez, E. Schlangen, Oguzhan Copuroglu
DOI
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https://doi.org/10.1016/j.matdes.2022.110623
Calcium aluminate cement High temperature degradation Molten slag spill
More Info
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Published Date

2022

Language

English

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

Industries such as metal, ceramics and petrochemicals suffer from high temperature spills. Such events exert a unique form of loading in concrete structures that cannot be accurately simulated by heating of samples in an oven. Calcium aluminate cement (CAC) based concrete is the industry standard for such environment, and while much is known regarding its heating, literature considering hot spills on concrete surfaces is scarce. In this paper, slag is heated up to the same temperature as in a steel factory and then poured on top of cement paste samples with W/C ratios of 0.20 and 0.40. A combination of FEM, TGA, XRD and SEM/EDS was used to investigate the effects of hot spill on the samples. The rapid expansion caused by the thermal shock generated cracks in only some of the samples, while the high temperature environment and unidirectional escape of water caused chemical changes in all samples.