Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method
Geopolymer concrete is more low-carbon and environmentally friendly than Portland cement concrete. Nanoparticle modification can help to improve the mechanical and durability performance of concrete, but due to its large specific surface area and high activity, it may deteriorate its workability. Ho...
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MDPI AG
2024-11-01
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| author | Yong-Hua Tian Jia-Cheng Tao Tao Luo Li Li |
| author_facet | Yong-Hua Tian Jia-Cheng Tao Tao Luo Li Li |
| author_sort | Yong-Hua Tian |
| collection | DOAJ |
| description | Geopolymer concrete is more low-carbon and environmentally friendly than Portland cement concrete. Nanoparticle modification can help to improve the mechanical and durability performance of concrete, but due to its large specific surface area and high activity, it may deteriorate its workability. However, there is currently limited research on the effect of nanomodification on the workability of freshly mixed self-compacting geopolymer concrete (SCGC). This article conducted SCGC workability experiments using the response surface methodology, which included 29 different mixtures. The effects of nano-silica (NS), nano-calcium carbonate (NC), alkali content (N/B), and water cement ratio (W/B) on the workability of SCGC were studied. The experimental results show that the addition of NS and NC can reduce the slump expansion of SCGC, and the combination of the two significantly increases the amplitude of slump expansion with the change in nanomaterial content. An increase in N/B will reduce the expansion time and clearance value of SCGC. As N/B increases from 4% to 4.4%, the slump extension of SCGC decreases, and with a further increase in N/B, the slump extension increases significantly to 68.1 cm, which means that the slump extension of SCGC increases by 9.5% as N/B increases from 4.4 to 5. This study can provide a reference for optimizing the fresh performance of geopolymer concrete and improving the mechanism of nanomaterial-modified geopolymer concrete. |
| format | Article |
| id | doaj-art-1c320bbb018c404b9ba63d79cad85e14 |
| institution | OA Journals |
| issn | 2075-5309 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Buildings |
| spelling | doaj-art-1c320bbb018c404b9ba63d79cad85e142025-08-20T02:08:14ZengMDPI AGBuildings2075-53092024-11-011411361010.3390/buildings14113610Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface MethodYong-Hua Tian0Jia-Cheng Tao1Tao Luo2Li Li3Sinohydro Fifth Engineering Bureau Limited, Chengdu 610066, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, ChinaKey Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, ChinaGeopolymer concrete is more low-carbon and environmentally friendly than Portland cement concrete. Nanoparticle modification can help to improve the mechanical and durability performance of concrete, but due to its large specific surface area and high activity, it may deteriorate its workability. However, there is currently limited research on the effect of nanomodification on the workability of freshly mixed self-compacting geopolymer concrete (SCGC). This article conducted SCGC workability experiments using the response surface methodology, which included 29 different mixtures. The effects of nano-silica (NS), nano-calcium carbonate (NC), alkali content (N/B), and water cement ratio (W/B) on the workability of SCGC were studied. The experimental results show that the addition of NS and NC can reduce the slump expansion of SCGC, and the combination of the two significantly increases the amplitude of slump expansion with the change in nanomaterial content. An increase in N/B will reduce the expansion time and clearance value of SCGC. As N/B increases from 4% to 4.4%, the slump extension of SCGC decreases, and with a further increase in N/B, the slump extension increases significantly to 68.1 cm, which means that the slump extension of SCGC increases by 9.5% as N/B increases from 4.4 to 5. This study can provide a reference for optimizing the fresh performance of geopolymer concrete and improving the mechanism of nanomaterial-modified geopolymer concrete.https://www.mdpi.com/2075-5309/14/11/3610self-compacting geopolymer concrete (SCGC)response surface methodworking performancemodification of nanomaterials |
| spellingShingle | Yong-Hua Tian Jia-Cheng Tao Tao Luo Li Li Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method Buildings self-compacting geopolymer concrete (SCGC) response surface method working performance modification of nanomaterials |
| title | Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method |
| title_full | Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method |
| title_fullStr | Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method |
| title_full_unstemmed | Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method |
| title_short | Workability of Nanomodified Self-Compacting Geopolymer Concrete Based on Response Surface Method |
| title_sort | workability of nanomodified self compacting geopolymer concrete based on response surface method |
| topic | self-compacting geopolymer concrete (SCGC) response surface method working performance modification of nanomaterials |
| url | https://www.mdpi.com/2075-5309/14/11/3610 |
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