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Pro133

CARBONATION OF CEMENT BY SUPER-SATURATED AQUEOUS SOLUTION



Author(s): N. Lippiatt, T.C. Ling
Paper category: Proceedings
Book title: CO2STO2019 - International Workshop CO2 Storage in Concrete
Editor(s): Assia Djerbi, Othman Omikrine-Metalssi, Teddy Fen-Chong
ISBN:
e-ISBN: 978-2-35158-232-9
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 234-242
Total Pages: 09
Language : English


Abstract: Due to the ubiquitous use of cementitious materials, their carbonation is one of the most
promising avenues for addressing climate change. Carbonation can enhance the strength of
cementitious materials and offers a way to sequester carbon dioxide economically on a large
scale. However, the majority of carbonation appropriate materials, ready-mix concretes, are
currently made under atmospheric conditions. For the carbonation reaction to outpace the
hydration reaction, the concrete must be made under conditions with a high CO2 partial
pressure. Therefore, extensive implementation of carbonation in construction requires a
market shift towards pre-cast materials or, the development of novel technology for the delivery
of concentrated carbon dioxide. In this study, water used for cement hydration was
supplemented with calcium carbonate and dissolved carbon dioxide. Under certain conditions
the carbonated ordinary Portland cement paste is found to be stronger than traditional cured
cement pastes, however, under carefully controlled conditions ordinary Portland cement is
much stronger than carbonated cement paste.


Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00


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