Phosphogypsum-Based Ultra-Low Basicity Cementing Material
Traditional Portland cement is widely used in the preparation of various hydraulic concrete. However, the high alkalinity produced by cement hydration threatens the survival of aquatic animals and plants. In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared wit...
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| Format: | Article |
| Language: | English |
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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/1996-1944/15/19/6601 |
| _version_ | 1797478409948889088 |
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| author | Pengping Li Xinxing Zhang Mingfeng Zhong Zhihong Fan Jianbo Xiong Zhijie Zhang |
| author_facet | Pengping Li Xinxing Zhang Mingfeng Zhong Zhihong Fan Jianbo Xiong Zhijie Zhang |
| author_sort | Pengping Li |
| collection | DOAJ |
| description | Traditional Portland cement is widely used in the preparation of various hydraulic concrete. However, the high alkalinity produced by cement hydration threatens the survival of aquatic animals and plants. In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared with industrial waste phosphogypsum, granulated ground blast slag (GGBS) and sulphoaluminate cement. When appropriate proportions are used, the pH value of the test blocks’ pore solutions at different ages were all less than 9, showing the remarkable characteristic of ultra-low alkalinity. The XRD and SEM analyses showed that the 56 d hydration products were mainly ettringite and hydrated calcium silicate, and the content of Ca(OH)<sub>2</sub> was not detected. The new cementitious material also has the advantages of short setting time, low heat of hydration, high strength of cement mortar and the ability to fix harmful substances in phosphogypsum, such as phosphate, fluoride and Cr and Ba elements. It has a broad application prospect in the construction of island and reef construction, river restoration and so on. |
| first_indexed | 2024-03-09T21:32:31Z |
| format | Article |
| id | doaj.art-7c903d2cbbca404598faac42171087a1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:31Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-7c903d2cbbca404598faac42171087a12023-11-23T20:53:33ZengMDPI AGMaterials1996-19442022-09-011519660110.3390/ma15196601Phosphogypsum-Based Ultra-Low Basicity Cementing MaterialPengping Li0Xinxing Zhang1Mingfeng Zhong2Zhihong Fan3Jianbo Xiong4Zhijie Zhang5Key Laboratory of Harbor & Marine Structure Durability Technology, Ministry of Communications, Guangzhou 510230, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 511442, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 511442, ChinaKey Laboratory of Harbor & Marine Structure Durability Technology, Ministry of Communications, Guangzhou 510230, ChinaKey Laboratory of Harbor & Marine Structure Durability Technology, Ministry of Communications, Guangzhou 510230, ChinaSchool of Materials Science and Engineering, South China University of Technology, Guangzhou 511442, ChinaTraditional Portland cement is widely used in the preparation of various hydraulic concrete. However, the high alkalinity produced by cement hydration threatens the survival of aquatic animals and plants. In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared with industrial waste phosphogypsum, granulated ground blast slag (GGBS) and sulphoaluminate cement. When appropriate proportions are used, the pH value of the test blocks’ pore solutions at different ages were all less than 9, showing the remarkable characteristic of ultra-low alkalinity. The XRD and SEM analyses showed that the 56 d hydration products were mainly ettringite and hydrated calcium silicate, and the content of Ca(OH)<sub>2</sub> was not detected. The new cementitious material also has the advantages of short setting time, low heat of hydration, high strength of cement mortar and the ability to fix harmful substances in phosphogypsum, such as phosphate, fluoride and Cr and Ba elements. It has a broad application prospect in the construction of island and reef construction, river restoration and so on.https://www.mdpi.com/1996-1944/15/19/6601low alkalinitycementitious materialphosphogypsumgranulated ground blast slagsulphoaluminate cement |
| spellingShingle | Pengping Li Xinxing Zhang Mingfeng Zhong Zhihong Fan Jianbo Xiong Zhijie Zhang Phosphogypsum-Based Ultra-Low Basicity Cementing Material Materials low alkalinity cementitious material phosphogypsum granulated ground blast slag sulphoaluminate cement |
| title | Phosphogypsum-Based Ultra-Low Basicity Cementing Material |
| title_full | Phosphogypsum-Based Ultra-Low Basicity Cementing Material |
| title_fullStr | Phosphogypsum-Based Ultra-Low Basicity Cementing Material |
| title_full_unstemmed | Phosphogypsum-Based Ultra-Low Basicity Cementing Material |
| title_short | Phosphogypsum-Based Ultra-Low Basicity Cementing Material |
| title_sort | phosphogypsum based ultra low basicity cementing material |
| topic | low alkalinity cementitious material phosphogypsum granulated ground blast slag sulphoaluminate cement |
| url | https://www.mdpi.com/1996-1944/15/19/6601 |
| work_keys_str_mv | AT pengpingli phosphogypsumbasedultralowbasicitycementingmaterial AT xinxingzhang phosphogypsumbasedultralowbasicitycementingmaterial AT mingfengzhong phosphogypsumbasedultralowbasicitycementingmaterial AT zhihongfan phosphogypsumbasedultralowbasicitycementingmaterial AT jianboxiong phosphogypsumbasedultralowbasicitycementingmaterial AT zhijiezhang phosphogypsumbasedultralowbasicitycementingmaterial |