Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate
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 t...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/9856734 |
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| author | Zhengxin Chen Yunsu Lee Hyeongkyu Cho Hanseung Lee Seungmin Lim |
| author_facet | Zhengxin Chen Yunsu Lee Hyeongkyu Cho Hanseung Lee Seungmin Lim |
| author_sort | Zhengxin Chen |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-44fc6b45b77c40468e1de7c5a33d2639 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-44fc6b45b77c40468e1de7c5a33d26392025-02-03T05:46:00ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/98567349856734Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium SilicateZhengxin Chen0Yunsu Lee1Hyeongkyu Cho2Hanseung Lee3Seungmin Lim4Department of Architectural System Engineering, Hanyang University, Seoul, Republic of KoreaDepartment of Architectural System Engineering, Hanyang University, Seoul, Republic of KoreaKorea Institute of Ceramic Engineering and Technology, Icheon, Republic of KoreaDepartment of Architectural Engineering, Hanyang University, Seoul, Republic of KoreaDepartment of Architectural Engineering, Hanyang University, Seoul, Republic of KoreaIn 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.http://dx.doi.org/10.1155/2019/9856734 |
| spellingShingle | Zhengxin Chen Yunsu Lee Hyeongkyu Cho Hanseung Lee Seungmin Lim Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate Advances in Materials Science and Engineering |
| title | Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate |
| title_full | Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate |
| title_fullStr | Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate |
| title_full_unstemmed | Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate |
| title_short | Improvement in Carbonation Resistance of Portland Cement Mortar Incorporating γ-Dicalcium Silicate |
| title_sort | improvement in carbonation resistance of portland cement mortar incorporating γ dicalcium silicate |
| url | http://dx.doi.org/10.1155/2019/9856734 |
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