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Materials 2018, 11(7), 1126; https://doi.org/10.3390/ma11071126

Microstructural Differences in Response of Thermoresistant (Ceramic) and Standard (Granite) Concretes on Heating. Studies Using SEM and Nonstandard Approaches to Microtomography and Mercury Intrusion Porosimetry Data

1
Department of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40, 20-618 Lublin, Poland
2
Department of Metrology and Modelling of Agrophysical Processes, Institute of Agrophysics, Doswiadczalna 4, 20-290 Lublin, Poland
3
Department of Physical Chemistry of Porous Materials, Institute of Agrophysics, Doswiadczalna 4, 20-290 Lublin, Poland
*
Author to whom correspondence should be addressed.
Received: 14 May 2018 / Revised: 18 June 2018 / Accepted: 28 June 2018 / Published: 2 July 2018
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

The microstructure of concretes containing ceramic sanitary ware waste and granite aggregates was studied using scanning electron microscopy, mercury intrusion porosimetry and computer microtomography, before and after cyclic heating of the concretes to 1000 °C. All methods showed an increase in porosities in the concretes after heating. The proposed new approach to microtomography data analysis detected a much higher increase in the number of cracks in granite than in ceramic concrete after heating. This new approach to combining mercury intrusion and microtomography data showed that heating led to the narrowing of throats connecting smaller pore voids and a broadening of throats connecting larger pore voids, in both concretes. View Full-Text
Keywords: concrete; high temperature; resistance; microstructure; sanitary ceramics; waste materials concrete; high temperature; resistance; microstructure; sanitary ceramics; waste materials
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Franus, W.; Halicka, A.; Lamorski, K.; Jozefaciuk, G. Microstructural Differences in Response of Thermoresistant (Ceramic) and Standard (Granite) Concretes on Heating. Studies Using SEM and Nonstandard Approaches to Microtomography and Mercury Intrusion Porosimetry Data. Materials 2018, 11, 1126.

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