<abstract xmlns="http://www.w3.org/1999/xhtml">The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and Portland-fly ash cement carbonated at either natural conditions, 60% <italic>RH</italic> and 1% CO2, 90% <italic>RH</italic> and 5% CO2 or 60% <italic>RH</italic> and 100% CO2. Different characterization techniques were used: thermogravimetric analysis to study the solid phases, SEM-EDS point analysis to investigate the chemical composition of the solid phases, optical microscopy to investigate the microstructure, and cold water extraction to characterize the chemical composition of the pore solution. The combined results on microstructure and phase assemblage indicate that carbonation up to 5% CO2 appears representative for natural carbonation. Pore solution analysis revealed similar trends for the three accelerated carbonation conditions.</abstract>

The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and Portland-fly ash cement carbonated at either natural conditions, 60% RH and 1% CO2, 90% RH and 5% CO2 or 60% RH and 100% CO2. Different characterization techniques were used: thermogravimetric analysis to study the solid phases, SEM-EDS point analysis to investigate the chemical composition of the solid phases, optical microscopy to investigate the microstructure, and cold water extraction to characterize the chemical composition of the pore solution. The combined results on microstructure and phase assemblage indicate that carbonation up to 5% CO2 appears representative for natural carbonation. Pore solution analysis revealed similar trends for the three accelerated carbonation conditions.

Impact of Accelerated Carbonation on Microstructure and Phase Assemblage

Norwegian University of Science and Technology (NTNU)

Norwegian University of Science and Technology (NTNU),

Danish Technological Institute (DTI) Concrete Centre Gregersensvej

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Impact of Accelerated Carbonation on Microstructure and Phase Assemblage"}

The paper summarizes preliminary results on characterization of the microstructure and phase assemblage of mortar and concrete samples containing Portland and...

Impact of Accelerated Carbonation on Microstructure and Phase Assemblage

Published Online: Dec 31, 2018

Page range: 111 - 126

Received: Aug 29, 2018

Accepted: Dec 06, 2018

DOI: https://doi.org/10.2478/ncr-2018-0018

Keywords
Carbonation, microstructure, solid phases, pore solution, Portland-fly ash cement

© 2018 Andres Belda Revert et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Impact of Accelerated Carbonation on Microstructure and Phase Assemblage

Published Online: Dec 31, 2018

Page range: 111 - 126

Received: Aug 29, 2018

Accepted: Dec 06, 2018

DOI: https://doi.org/10.2478/ncr-2018-0018

KeywordsCarbonation, microstructure, solid phases, pore solution, Portland-fly ash cement

© 2018 Andres Belda Revert et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Carbonation, microstructure, solid phases, pore solution, Portland-fly ash cement