<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The internal pore structure of sulphoaluminate cement concrete (SACC) significantly affects its mechanical properties. The main purpose of this study was to establish the relationship between pore structure changes and compressive strength after exposure to elevated temperatures. SACC samples that had been cured for 12 months were dried to a constant weight and then exposed to different temperatures (100 °C, 200 °C and 300 °C), after which the compressive strength and pore structure were measured. The pore structure of SACC was quantitatively described by mercury intrusion porosimetry (MIP) and nitrogen adsorption results. The results showed that with increased temperature, the porosity of the SACC samples also increased and the pore structure was gradually destroyed. Moreover, the SACC’s compressive strength gradually decreased with increasing temperature. The relationship between compressive strength and porosity was in close agreement with the compressive strength–porosity equation proposed by Schiller. Therefore, after extensive exposure to elevated temperature, the changes in SACC’s compressive strength can be quantitatively described by the Schiller equation.</p>
</abstract>

The internal pore structure of sulphoaluminate cement concrete (SACC) significantly affects its mechanical properties. The main purpose of this study was to establish the relationship between pore structure changes and compressive strength after exposure to elevated temperatures. SACC samples that had been cured for 12 months were dried to a constant weight and then exposed to different temperatures (100 °C, 200 °C and 300 °C), after which the compressive strength and pore structure were measured. The pore structure of SACC was quantitatively described by mercury intrusion porosimetry (MIP) and nitrogen adsorption results. The results showed that with increased temperature, the porosity of the SACC samples also increased and the pore structure was gradually destroyed. Moreover, the SACC’s compressive strength gradually decreased with increasing temperature. The relationship between compressive strength and porosity was in close agreement with the compressive strength–porosity equation proposed by Schiller. Therefore, after extensive exposure to elevated temperature, the changes in SACC’s compressive strength can be quantitatively described by the Schiller equation.

The impact of changes in pore structure on the compressive strength of sulphoaluminate cement concrete at high temperature

School of Materials Science and Engineering

Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The internal pore structure of sulphoaluminate cement concrete (SACC) significantly affects its mechanical properties. The main purpose of this study was to...

The impact of changes in pore structure on the compressive strength of sulphoaluminate cement concrete at high temperature

Published Online: Jul 06, 2021

Page range: 75 - 85

Received: Feb 25, 2021

Accepted: Mar 12, 2021

DOI: https://doi.org/10.2478/msp-2021-0006

Keywords
Elevated temperature, pore structure, sulphoaluminate cement concrete, mercury intrusion porosimetry (MIP), nitrogen adsorption

© 2021 J.J.K. Tchekwagep et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

The impact of changes in pore structure on the compressive strength of sulphoaluminate cement concrete at high temperature

Published Online: Jul 06, 2021

Page range: 75 - 85

Received: Feb 25, 2021

Accepted: Mar 12, 2021

DOI: https://doi.org/10.2478/msp-2021-0006

KeywordsElevated temperature, pore structure, sulphoaluminate cement concrete, mercury intrusion porosimetry (MIP), nitrogen adsorption

© 2021 J.J.K. Tchekwagep et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Elevated temperature, pore structure, sulphoaluminate cement concrete, mercury intrusion porosimetry (MIP), nitrogen adsorption