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Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate
Joint Authors
Lee, Han-Seung
Lim, Seungmin
Lee, Yunsu
Chen, Zhengxin
Cho, Hyeongkyu
Source
Advances in Materials Science and Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-08-05
Country of Publication
Egypt
No. of Pages
10
Abstract EN
In this study, γ-dicalcium silicate (γ-C2S) was incorporated into ordinary Portland cement (OPC) to sequester CO2 to enhance the carbonation resistance of cement-based composite materials.
γ-C2S can react with CO2 rapidly to form vaterite and high dense SiO2 gel which could block the pores off and then inhibit further diffusion of CO2 into the system.
Cement mortar specimens containing 0%, 5%, 10%, 20%, and 40% γ-C2S as cement replacement were prepared.
After water curing for 28 days followed by curing in an environmental chamber for 28 days, the specimens were then exposed to an accelerated carbonation with 5% CO2 concentration for 28 days.
The carbonation depth of the cement mortar with a low replacement rate (5% and 10%) was lower than that of the OPC mortar at all ages due to the sequestration of CO2 by γ-C2S.
However, the cement mortar with a high replacement rate (20% and 40%) showed less carbonation resistance due to the dilution effect of γ-C2S replacement and increase in initial porosity caused by nonhydraulic characteristic of γ-C2S.
American Psychological Association (APA)
Chen, Zhengxin& Lee, Yunsu& Cho, Hyeongkyu& Lee, Han-Seung& Lim, Seungmin. 2019. Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate. Advances in Materials Science and Engineering،Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1121483
Modern Language Association (MLA)
Chen, Zhengxin…[et al.]. Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate. Advances in Materials Science and Engineering No. 2019 (2019), pp.1-10.
https://search.emarefa.net/detail/BIM-1121483
American Medical Association (AMA)
Chen, Zhengxin& Lee, Yunsu& Cho, Hyeongkyu& Lee, Han-Seung& Lim, Seungmin. Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate. Advances in Materials Science and Engineering. 2019. Vol. 2019, no. 2019, pp.1-10.
https://search.emarefa.net/detail/BIM-1121483
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121483