Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling
To investigate the effects of limestone powder and gypsum on the early hydration of ye’elimite, the hydration behavior of C<sub>4</sub>A<sub>3</sub><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics&...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/19/6645 |
| _version_ | 1797478421220032512 |
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| author | Jian Ma Ting Wang Hu Shi Zhuqing Yu Xiaodong Shen |
| author_facet | Jian Ma Ting Wang Hu Shi Zhuqing Yu Xiaodong Shen |
| author_sort | Jian Ma |
| collection | DOAJ |
| description | To investigate the effects of limestone powder and gypsum on the early hydration of ye’elimite, the hydration behavior of C<sub>4</sub>A<sub>3</sub><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mi mathvariant="normal">S</mi><mo stretchy="true">¯</mo></mover></mrow></semantics></math></inline-formula>-LP-CaSO<sub>4</sub>·2H<sub>2</sub>O-H<sub>2</sub>O systems are researched. The hydration behavior of systems are researched by employing isothermal calorimetry, XRD technique and chemical shrinkage. The thermodynamic modelling method is employed to predict the equilibrium phase assemblages. The results show that the system with 5 wt.% LP has a comparable hydration heat evolution to limestone powder-free systems. Limestone powder can take part in the reaction to produce monocarboaluminate in the system with M-value (molar ratio of gypsum to ye’elimite) of 1, but monocarboaluminate is not found in the system with M-value of 2. The level off time of chemical shrinkage shortens with the increase of limestone powder dosage. Thermodynamic modelling results show that monocarboaluminate is no longer formed in all systems when M-value exceeds 1.27, which corresponds to the XRD results. This study can provide theoretical guidance for the rational utilization of limestone powder in calcium sulphoaluminate cement. |
| first_indexed | 2024-03-09T21:31:40Z |
| format | Article |
| id | doaj.art-a1623668661e449f85f0ee58ab1abe2a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:31:40Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a1623668661e449f85f0ee58ab1abe2a2023-11-23T20:54:19ZengMDPI AGMaterials1996-19442022-09-011519664510.3390/ma15196645Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic ModellingJian Ma0Ting Wang1Hu Shi2Zhuqing Yu3Xiaodong Shen4College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, ChinaTo investigate the effects of limestone powder and gypsum on the early hydration of ye’elimite, the hydration behavior of C<sub>4</sub>A<sub>3</sub><inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mover accent="true"><mi mathvariant="normal">S</mi><mo stretchy="true">¯</mo></mover></mrow></semantics></math></inline-formula>-LP-CaSO<sub>4</sub>·2H<sub>2</sub>O-H<sub>2</sub>O systems are researched. The hydration behavior of systems are researched by employing isothermal calorimetry, XRD technique and chemical shrinkage. The thermodynamic modelling method is employed to predict the equilibrium phase assemblages. The results show that the system with 5 wt.% LP has a comparable hydration heat evolution to limestone powder-free systems. Limestone powder can take part in the reaction to produce monocarboaluminate in the system with M-value (molar ratio of gypsum to ye’elimite) of 1, but monocarboaluminate is not found in the system with M-value of 2. The level off time of chemical shrinkage shortens with the increase of limestone powder dosage. Thermodynamic modelling results show that monocarboaluminate is no longer formed in all systems when M-value exceeds 1.27, which corresponds to the XRD results. This study can provide theoretical guidance for the rational utilization of limestone powder in calcium sulphoaluminate cement.https://www.mdpi.com/1996-1944/15/19/6645hydrationlimestone powder contentgypsum contentthermodynamic modellingchemical shrinkage |
| spellingShingle | Jian Ma Ting Wang Hu Shi Zhuqing Yu Xiaodong Shen Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling Materials hydration limestone powder content gypsum content thermodynamic modelling chemical shrinkage |
| title | Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling |
| title_full | Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling |
| title_fullStr | Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling |
| title_full_unstemmed | Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling |
| title_short | Effects of Limestone Powder on the Early Hydration Behavior of Ye’elimite: Experimental Research and Thermodynamic Modelling |
| title_sort | effects of limestone powder on the early hydration behavior of ye elimite experimental research and thermodynamic modelling |
| topic | hydration limestone powder content gypsum content thermodynamic modelling chemical shrinkage |
| url | https://www.mdpi.com/1996-1944/15/19/6645 |
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