Surface effects of molten slag spills on calcium aluminate cement paste

F.F. Mendonça Filho; C. Romero Rodriguez; E. Schlangen; O. Copuroglu

doi:10.1016/j.matdes.2022.110623

Surface effects of molten slag spills on calcium aluminate cement paste

F.F. Mendonça Filho^*, C. Romero Rodriguez, E. Schlangen, O. Copuroglu

^*Corresponding author for this work

Materials and Environment

Research output: Contribution to journal › Article › Scientific › peer-review

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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.

Original language	English
Article number	110623
Pages (from-to)	1-13
Number of pages	13
Journal	Materials & Design
Volume	217
DOIs	https://doi.org/10.1016/j.matdes.2022.110623
Publication status	Published - 2022

Keywords

Calcium aluminate cement
high temperature degradation
molten slag spill

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10.1016/j.matdes.2022.110623

1-s2.0-S0264127522002441-mainFinal published version, 5.4 MBLicence: CC BY

Cite this

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title = "Surface effects of molten slag spills on calcium aluminate cement paste",

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.",

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T1 - Surface effects of molten slag spills on calcium aluminate cement paste

AU - Mendonça Filho, F.F.

AU - Rodriguez, C. Romero

AU - Schlangen, E.

AU - Copuroglu, O.

PY - 2022

Y1 - 2022

N2 - 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.

AB - 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.

KW - Calcium aluminate cement

KW - high temperature degradation

KW - molten slag spill

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Surface effects of molten slag spills on calcium aluminate cement paste

Abstract

Keywords

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Thermal Shock Damage in Construction Materials: Impact and prediction of concrete and natural rocks behavior

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