STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT
Belite-calcium sulphoaluminate (BCSA) cement is a promising low-CO2 alternative to ordinary Portland cement. With high water cement ratio, phase compositions of the BCSA pastes at different curing ages were investigated via X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Large a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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University of Chemistry and Technology, Prague
2014-12-01
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| Series: | Ceramics-Silikáty |
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| Online Access: |
https://www.irsm.cas.cz/materialy/cs_content/2014/Song_CS_2014_0000.pdf
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| _version_ | 1818991969955741696 |
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| author | Fei Song Zhenglei Yu Yang Fengling Liu Yunfei Lu Yinong |
| author_facet | Fei Song Zhenglei Yu Yang Fengling Liu Yunfei Lu Yinong |
| author_sort | Fei Song |
| collection | DOAJ |
| description | Belite-calcium sulphoaluminate (BCSA) cement is a promising low-CO2 alternative to ordinary Portland cement. With high
water cement ratio, phase compositions of the BCSA pastes at different curing ages were investigated via X-ray diffraction
(XRD) and differential scanning calorimetry (DSC). Large amounts of water accelerated the hydration reaction significantly
and substantial ettringite (C6AS3.H32, AFt) was generated in the early stages. With the carbonation of AFt in the later stages,
lots of stratlingite (C2ASH8) and calcium hemicarboaluminate hydrate (C4AC0.5H12, Hc) formed after curing age of 28 days.
The microstructure of C2ASH8 and Hc in the BCSA pastes were observed and confirmed via a scanning electron microscope
(SEM) and an energy dispersive X-ray spectrometer (EDS). The results indicated that C2ASH8 was thick hexagonal plate
product and Hc was thin sheet-like product. C2ASH8 and Hc would stack together respectively in the later stages of hydration.
In addition, spherical aluminum hydroxide (AH3) and rod-like AFt were also observed. |
| first_indexed | 2024-12-20T20:18:43Z |
| format | Article |
| id | doaj.art-e0837f3f1ae9427e8299297bfc868d05 |
| institution | Directory Open Access Journal |
| issn | 0862-5468 1804-5847 |
| language | English |
| last_indexed | 2024-12-20T20:18:43Z |
| publishDate | 2014-12-01 |
| publisher | University of Chemistry and Technology, Prague |
| record_format | Article |
| series | Ceramics-Silikáty |
| spelling | doaj.art-e0837f3f1ae9427e8299297bfc868d052022-12-21T19:27:38ZengUniversity of Chemistry and Technology, PragueCeramics-Silikáty0862-54681804-58472014-12-01584269274.20160312092815STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENTFei Song0Zhenglei Yu1Yang Fengling2Liu Yunfei3Lu Yinong4 State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China State Key Laboratory of Materials-Oriented Chemical Engineering, College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China Belite-calcium sulphoaluminate (BCSA) cement is a promising low-CO2 alternative to ordinary Portland cement. With high water cement ratio, phase compositions of the BCSA pastes at different curing ages were investigated via X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Large amounts of water accelerated the hydration reaction significantly and substantial ettringite (C6AS3.H32, AFt) was generated in the early stages. With the carbonation of AFt in the later stages, lots of stratlingite (C2ASH8) and calcium hemicarboaluminate hydrate (C4AC0.5H12, Hc) formed after curing age of 28 days. The microstructure of C2ASH8 and Hc in the BCSA pastes were observed and confirmed via a scanning electron microscope (SEM) and an energy dispersive X-ray spectrometer (EDS). The results indicated that C2ASH8 was thick hexagonal plate product and Hc was thin sheet-like product. C2ASH8 and Hc would stack together respectively in the later stages of hydration. In addition, spherical aluminum hydroxide (AH3) and rod-like AFt were also observed. https://www.irsm.cas.cz/materialy/cs_content/2014/Song_CS_2014_0000.pdf Belite-calcium sulphoaluminate Hydration Stratlingite Calcium hemicarboaluminate hydrate |
| spellingShingle | Fei Song Zhenglei Yu Yang Fengling Liu Yunfei Lu Yinong STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT Ceramics-Silikáty Belite-calcium sulphoaluminate Hydration Stratlingite Calcium hemicarboaluminate hydrate |
| title | STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT |
| title_full | STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT |
| title_fullStr | STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT |
| title_full_unstemmed | STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT |
| title_short | STRATLINGITE AND CALCIUM HEMICARBOALUMINATE HYDRATE IN BELITE-CALCIUM SULPHOALUMINATE CEMENT |
| title_sort | stratlingite and calcium hemicarboaluminate hydrate in belite calcium sulphoaluminate cement |
| topic | Belite-calcium sulphoaluminate Hydration Stratlingite Calcium hemicarboaluminate hydrate |
| url |
https://www.irsm.cas.cz/materialy/cs_content/2014/Song_CS_2014_0000.pdf
|
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