Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures
To explore the feasibility of using blended mineral admixtures to improve the performance of magnesium phosphate cement (MPC) composites, fly ash (FA) + ground granulated blast furnace slag (GGBS) and fly ash (FA) + silica fume (SF) were used to partially replace the MPC, respectively, in this study...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509522003333 |
| _version_ | 1811232048966270976 |
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| author | Hu Feng Shuang Nie Aofei Guo Lijun Lv Liusheng Chu Jiahuan Yu |
| author_facet | Hu Feng Shuang Nie Aofei Guo Lijun Lv Liusheng Chu Jiahuan Yu |
| author_sort | Hu Feng |
| collection | DOAJ |
| description | To explore the feasibility of using blended mineral admixtures to improve the performance of magnesium phosphate cement (MPC) composites, fly ash (FA) + ground granulated blast furnace slag (GGBS) and fly ash (FA) + silica fume (SF) were used to partially replace the MPC, respectively, in this study. Their effects on the setting time and flowability of MPC paste and the compressive strength of MPC mortar (MPCM) were investigated through setting test, flowability test, and compressive test. The test results showed that the blended FA and GGBS adversely affected the setting time of MPC paste but slightly improved the flowability of MPC paste and the compressive strength of MPCM if an appropriate content was used. And the blended FA and SF adversely affected both the setting time and flowability of MPC paste. However, compared to the MPCM without any mineral admixture or with SF (FA) alone, the 25 % FA+ 5 % SF, 32.5 % FA+ 7.5 % SF, and 35 % FA+ 5 % SF could further enhance the compressive strength of MPCM. In addition, the XRD and SEM tests showed that the blended FA and GGBS mostly resulted in loose microstructure of MPCM. However, an appropriate content of blended FA and SF could lead to the formation of a dense microstructure, and a new magnesia-silica gel substance (MgSiO3) was generated, which improved the compactness and compressive strength of MPCM. |
| first_indexed | 2024-04-12T10:56:42Z |
| format | Article |
| id | doaj.art-54d8ee8835c342f1a2e4b0522ef55267 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-04-12T10:56:42Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-54d8ee8835c342f1a2e4b0522ef552672022-12-22T03:36:05ZengElsevierCase Studies in Construction Materials2214-50952022-12-0117e01201Fresh properties and compressive strength of MPC-based materials with blended mineral admixturesHu Feng0Shuang Nie1Aofei Guo2Lijun Lv3Liusheng Chu4Jiahuan Yu5School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, ChinaSchool of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, ChinaSchool of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China; Corresponding author.School of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, ChinaSchool of Civil Engineering, Zhengzhou University, Zhengzhou, Henan 450001, ChinaFoshan University, Guangdong 528225, ChinaTo explore the feasibility of using blended mineral admixtures to improve the performance of magnesium phosphate cement (MPC) composites, fly ash (FA) + ground granulated blast furnace slag (GGBS) and fly ash (FA) + silica fume (SF) were used to partially replace the MPC, respectively, in this study. Their effects on the setting time and flowability of MPC paste and the compressive strength of MPC mortar (MPCM) were investigated through setting test, flowability test, and compressive test. The test results showed that the blended FA and GGBS adversely affected the setting time of MPC paste but slightly improved the flowability of MPC paste and the compressive strength of MPCM if an appropriate content was used. And the blended FA and SF adversely affected both the setting time and flowability of MPC paste. However, compared to the MPCM without any mineral admixture or with SF (FA) alone, the 25 % FA+ 5 % SF, 32.5 % FA+ 7.5 % SF, and 35 % FA+ 5 % SF could further enhance the compressive strength of MPCM. In addition, the XRD and SEM tests showed that the blended FA and GGBS mostly resulted in loose microstructure of MPCM. However, an appropriate content of blended FA and SF could lead to the formation of a dense microstructure, and a new magnesia-silica gel substance (MgSiO3) was generated, which improved the compactness and compressive strength of MPCM.http://www.sciencedirect.com/science/article/pii/S2214509522003333Magnesium phosphate cementMineral admixtureSetting timeFlowabilityCompressive strengthMicrostructure |
| spellingShingle | Hu Feng Shuang Nie Aofei Guo Lijun Lv Liusheng Chu Jiahuan Yu Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures Case Studies in Construction Materials Magnesium phosphate cement Mineral admixture Setting time Flowability Compressive strength Microstructure |
| title | Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures |
| title_full | Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures |
| title_fullStr | Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures |
| title_full_unstemmed | Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures |
| title_short | Fresh properties and compressive strength of MPC-based materials with blended mineral admixtures |
| title_sort | fresh properties and compressive strength of mpc based materials with blended mineral admixtures |
| topic | Magnesium phosphate cement Mineral admixture Setting time Flowability Compressive strength Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2214509522003333 |
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