The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste
The ferrite aluminate cement (FAC) could rapidly lose fluidity or workability due to its excessive hydration rate, and greatly reduce the construction performance. Chemical admixtures are commonly used to provide the workability of cement-based materials. In this study, to ensure required fluidity o...
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MDPI AG
2021-06-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/7/731 |
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| author | Chunlong Huang Zirui Cheng Jihui Zhao Yiren Wang Jie Pang |
| author_facet | Chunlong Huang Zirui Cheng Jihui Zhao Yiren Wang Jie Pang |
| author_sort | Chunlong Huang |
| collection | DOAJ |
| description | The ferrite aluminate cement (FAC) could rapidly lose fluidity or workability due to its excessive hydration rate, and greatly reduce the construction performance. Chemical admixtures are commonly used to provide the workability of cement-based materials. In this study, to ensure required fluidity of FAC, chemically different water reducing agents are incorporated into the FAC pastes. The experiments are performed with aliphatic water reducing agent (AP), polycarboxylic acid water reducing agent (PC) and melamine water reducing agent (MA), respectively. Influence of the water reducing agents on fluidity, setting time, hydration process, hydration product and zeta potential of the fresh cement pastes is investigated. The results show that PC has a better dispersion capacity compared to AP and MA. Besides decreasing water dosage, PC also acts as a retarder, significantly increasing the setting times, delaying the hydration rate and leading to less ettringite in the hydration process of FAC particles. The water reducing agents molecules are adsorbed on the surface of positively charged minerals and hydration products, however, for PC, steric hindrance from the long side chain of PC plays a critical role in dispersing cement particles, whereas AP and MA acting through an electrostatic repulsion force. |
| first_indexed | 2024-03-10T10:05:16Z |
| format | Article |
| id | doaj.art-1d9a9745060c4ff8a9819186da3147ee |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T10:05:16Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-1d9a9745060c4ff8a9819186da3147ee2023-11-22T01:35:26ZengMDPI AGCrystals2073-43522021-06-0111773110.3390/cryst11070731The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement PasteChunlong Huang0Zirui Cheng1Jihui Zhao2Yiren Wang3Jie Pang4School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaSchool of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, ChinaCollege of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, ChinaThe ferrite aluminate cement (FAC) could rapidly lose fluidity or workability due to its excessive hydration rate, and greatly reduce the construction performance. Chemical admixtures are commonly used to provide the workability of cement-based materials. In this study, to ensure required fluidity of FAC, chemically different water reducing agents are incorporated into the FAC pastes. The experiments are performed with aliphatic water reducing agent (AP), polycarboxylic acid water reducing agent (PC) and melamine water reducing agent (MA), respectively. Influence of the water reducing agents on fluidity, setting time, hydration process, hydration product and zeta potential of the fresh cement pastes is investigated. The results show that PC has a better dispersion capacity compared to AP and MA. Besides decreasing water dosage, PC also acts as a retarder, significantly increasing the setting times, delaying the hydration rate and leading to less ettringite in the hydration process of FAC particles. The water reducing agents molecules are adsorbed on the surface of positively charged minerals and hydration products, however, for PC, steric hindrance from the long side chain of PC plays a critical role in dispersing cement particles, whereas AP and MA acting through an electrostatic repulsion force.https://www.mdpi.com/2073-4352/11/7/731chemical admixturewater reducing agentferrite aluminate cementcement hydration |
| spellingShingle | Chunlong Huang Zirui Cheng Jihui Zhao Yiren Wang Jie Pang The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste Crystals chemical admixture water reducing agent ferrite aluminate cement cement hydration |
| title | The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste |
| title_full | The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste |
| title_fullStr | The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste |
| title_full_unstemmed | The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste |
| title_short | The Influence of Water Reducing Agents on Early Hydration Property of Ferrite Aluminate Cement Paste |
| title_sort | influence of water reducing agents on early hydration property of ferrite aluminate cement paste |
| topic | chemical admixture water reducing agent ferrite aluminate cement cement hydration |
| url | https://www.mdpi.com/2073-4352/11/7/731 |
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