1. bookVolume 59 (2018): Issue 1 (December 2018)
Journal Details
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First Published
30 Sep 2018
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2 times per year
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English
access type Open Access

Impact of Accelerated Carbonation on Microstructure and Phase Assemblage

Published Online: 31 Dec 2018
Page range: 111 - 126
Received: 29 Aug 2018
Accepted: 06 Dec 2018
Journal Details
License
Format
Journal
First Published
30 Sep 2018
Publication timeframe
2 times per year
Languages
English

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.

Keywords

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