Properties and Microstructure of CO2 Cured Concrete Blocks

Title: Properties and Microstructure of CO2 Cured Concrete Blocks
Author(s): Caijun SHI, Fuqiang HE
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 96 - 107
Total Pages: 12
Nb references: 13
Language: English

Abstract: CO2 curing of concrete seems a very efficient process in both absorbing CO2 and producing quality concrete products. Experimental results indicated that a dry pre-conditioning before CO2 curing was very critical for concrete specimens to achieve desirable strength or degree of CO2 curing. the strength of concrete mixtures for block manufacture after CO2 curing was close to that after conventional steam curing. The specimen pre-conditioned in a moist environment hydrated more than those pre-conditioned in the dry environment during the pre-conditioning period. However, much less CaCO3 formed in the former than that in the latter after the CO2 curing. Thus, the CO2 curing is mainly contributed by the reactions between CO2 gas and cement clink minerals.

Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00