CO2 binding capacity of alkali-activated fly ash and slag pastes

Marija Nedeljkovic, Bahman Ghiassi, S Melzer, Chris Kooij, Sieger van der Laan, Guang Ye

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
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Abstract

Quantification of the CO2 binding capacity of reinforced concrete is of high
importance for predicting the carbonation potential and service life of these structures. Such information is still not available for alkali activated materials that have received extensive attention as a sustainable substitute for ordinary Portland cement (OPC)-based concrete. To address this gap, this paper evaluates the CO2 binding capacity of ground powders of alkali activated fly ash (FA) and ground granulated blast furnace slag (GBFS) pastes under accelerated carbonation conditions (1 % v/v CO2, 60% RH, 20°C) for up to 180 days. The
CO2 binding capacity, the gel phase changes, and the carbonate phases are investigated with complementary TG-DTG-MS, FT-IR and QXRD techniques.
Original languageEnglish
Pages (from-to)19646-19660
Number of pages42
JournalCeramics International
Volume44
Issue number16
DOIs
Publication statusPublished - 2018

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