Enhancement of high temperature performance of cement blocks via CO 2 curing
Carbonation for the curing of cement-based materials has been gaining increased attention in recent years, especially in light of emerging initiatives to reduce carbon dioxide (CO 2 ) emissions. Carbonation method or CO 2 curing is founded on the basis of the reaction between CO 2 and cement product...
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| Format: | Article |
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Elsevier
2019
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| _version_ | 1825720872786198528 |
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| author | Meng, Yazi Ling, Tung Chai Mo, Kim Hung Tian, Weihao |
| author_facet | Meng, Yazi Ling, Tung Chai Mo, Kim Hung Tian, Weihao |
| author_sort | Meng, Yazi |
| collection | UM |
| description | Carbonation for the curing of cement-based materials has been gaining increased attention in recent years, especially in light of emerging initiatives to reduce carbon dioxide (CO 2 ) emissions. Carbonation method or CO 2 curing is founded on the basis of the reaction between CO 2 and cement products to form thermally stable and denser carbonate, which not only improves the physical and mechanical properties of cement-based materials, but also has the ability to utilize and store CO 2 safely and permanently. This study aims to assess the effect of CO 2 curing technology on the high-temperatures performance of cement blocks. Upon molding, dry-mix cement blocks were cured under statically accelerated carbonation condition (20% CO 2 concentration with 70% relative humidity) for 28 days, followed by exposure to elevated temperatures of 300 °C to 800 °C in order to comprehensively study the principal phase changes and decompositions of cement hydrates. The results indicated that CO 2 curing improved the performance of cement blocks, such as enhancement in the residual compressive strength and reducing the sorptivity. At 600 °C, the scanning electron microscopy (SEM) revealed a denser microstructure while thermal analisis and X-ray diffraction (XRD) analysis also clearly demonstrated that higher amounts of calcium carbonate were present in the cement blocks after CO 2 curing, suggesting better high-temperature performance compared to natural cured cement blocks. In general, an improved high-temperature performance, specifically at 600 °C of the dry-mixed cement blocks was demonstrated by adopting the CO 2 curing technology. This confirms the potential of utilizing CO 2 curing technology in not only improving quality of cement blocks, new avenue for storing of CO2 in construction material can be realized at the same time. © 2019 |
| first_indexed | 2024-03-06T05:41:43Z |
| format | Article |
| id | um.eprints-16691 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:41:43Z |
| publishDate | 2019 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-166912020-03-17T02:52:00Z http://eprints.um.edu.my/16691/ Enhancement of high temperature performance of cement blocks via CO 2 curing Meng, Yazi Ling, Tung Chai Mo, Kim Hung Tian, Weihao TA Engineering (General). Civil engineering (General) Carbonation for the curing of cement-based materials has been gaining increased attention in recent years, especially in light of emerging initiatives to reduce carbon dioxide (CO 2 ) emissions. Carbonation method or CO 2 curing is founded on the basis of the reaction between CO 2 and cement products to form thermally stable and denser carbonate, which not only improves the physical and mechanical properties of cement-based materials, but also has the ability to utilize and store CO 2 safely and permanently. This study aims to assess the effect of CO 2 curing technology on the high-temperatures performance of cement blocks. Upon molding, dry-mix cement blocks were cured under statically accelerated carbonation condition (20% CO 2 concentration with 70% relative humidity) for 28 days, followed by exposure to elevated temperatures of 300 °C to 800 °C in order to comprehensively study the principal phase changes and decompositions of cement hydrates. The results indicated that CO 2 curing improved the performance of cement blocks, such as enhancement in the residual compressive strength and reducing the sorptivity. At 600 °C, the scanning electron microscopy (SEM) revealed a denser microstructure while thermal analisis and X-ray diffraction (XRD) analysis also clearly demonstrated that higher amounts of calcium carbonate were present in the cement blocks after CO 2 curing, suggesting better high-temperature performance compared to natural cured cement blocks. In general, an improved high-temperature performance, specifically at 600 °C of the dry-mixed cement blocks was demonstrated by adopting the CO 2 curing technology. This confirms the potential of utilizing CO 2 curing technology in not only improving quality of cement blocks, new avenue for storing of CO2 in construction material can be realized at the same time. © 2019 Elsevier 2019 Article PeerReviewed Meng, Yazi and Ling, Tung Chai and Mo, Kim Hung and Tian, Weihao (2019) Enhancement of high temperature performance of cement blocks via CO 2 curing. Science of the Total Environment, 671. pp. 827-837. ISSN 0048-9697, DOI https://doi.org/10.1016/j.scitotenv.2019.03.411 <https://doi.org/10.1016/j.scitotenv.2019.03.411>. https://doi.org/10.1016/j.scitotenv.2019.03.411 doi:10.1016/j.scitotenv.2019.03.411 |
| spellingShingle | TA Engineering (General). Civil engineering (General) Meng, Yazi Ling, Tung Chai Mo, Kim Hung Tian, Weihao Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title | Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title_full | Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title_fullStr | Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title_full_unstemmed | Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title_short | Enhancement of high temperature performance of cement blocks via CO 2 curing |
| title_sort | enhancement of high temperature performance of cement blocks via co 2 curing |
| topic | TA Engineering (General). Civil engineering (General) |
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