Nanoscale Pore Refinement and Hydration Control in Anhydrite-Modified Supersulfated Cement: Role of Calcination-Induced Crystal Phase Transition
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| Publicado en: | Nanomaterials vol. 15, no. 18 (2025), p. 1432-1453 |
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| Autor principal: | |
| Otros Autores: | , , , , , , |
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MDPI AG
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| Acceso en línea: | Citation/Abstract Full Text + Graphics Full Text - PDF |
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| 001 | 3254622283 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 2079-4991 | ||
| 024 | 7 | |a 10.3390/nano15181432 |2 doi | |
| 035 | |a 3254622283 | ||
| 045 | 2 | |b d20250101 |b d20251231 | |
| 084 | |a 231543 |2 nlm | ||
| 100 | 1 | |a Hu Zeyuan |u School of Safety Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; zeyuan_hu@163.com (Z.H.); chen-zhang@njust.edu.cn (C.Z.) | |
| 245 | 1 | |a Nanoscale Pore Refinement and Hydration Control in Anhydrite-Modified Supersulfated Cement: Role of Calcination-Induced Crystal Phase Transition | |
| 260 | |b MDPI AG |c 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a Nanostructural optimization is key to enhancing the performance of low-carbon cements. Supersulfated cement (SSC) is an eco-friendly, low-carbon cement primarily composed of blast furnace slag and calcium sulfate. This study investigates the effects of two types of crystalline anhydrite on the hydration degree and strength of SSC. The experiment used III <inline-formula>CaSO4</inline-formula> (high solubility) and II-U <inline-formula>CaSO4</inline-formula> (low solubility) as sulfate activators, evaluating the mechanical properties of anhydrite produced at different calcination temperatures through an analysis of pore structure, phase composition, reaction degree of mineral powder, and hydration heat. The results indicate that II-U anhydrite enhances slag hydration, reduces pore size, and significantly improves the compressive strength of SSC. This improvement is attributed to its impact on slag hydration: it reduces gypsum consumption rate, delays ettringite formation, promotes gel product formation, decreases the volume ratio of ettringite to calcium silicate hydrate (C-S-H) gel, fills pores, and decreases porosity. This study reveals the influence of calcined dihydrate gypsum phase changes on the macroscopic properties of SSC and the microstructure of hydration, elucidating the hydration mechanism of anhydrite-based SSC. This work provides a nanomaterial-based strategy for SSC design via crystal phase engineering. | |
| 651 | 4 | |a China | |
| 653 | |a Carbon content | ||
| 653 | |a Mechanical properties | ||
| 653 | |a Cement | ||
| 653 | |a Ettringite | ||
| 653 | |a Slag | ||
| 653 | |a Gypsum | ||
| 653 | |a Calcium silicate hydrate | ||
| 653 | |a Calcium sulfate | ||
| 653 | |a Blast furnace slags | ||
| 653 | |a Phase transitions | ||
| 653 | |a Aluminum | ||
| 653 | |a Cements | ||
| 653 | |a Heat | ||
| 653 | |a Hydration | ||
| 653 | |a Raw materials | ||
| 653 | |a Pore size | ||
| 653 | |a Porosity | ||
| 653 | |a Sodium | ||
| 653 | |a Temperature | ||
| 653 | |a Solubility | ||
| 653 | |a Phase composition | ||
| 653 | |a Alcohol | ||
| 653 | |a Carbon | ||
| 653 | |a Curing | ||
| 653 | |a Compressive strength | ||
| 653 | |a Nanomaterials | ||
| 653 | |a Roasting | ||
| 700 | 1 | |a Zhang, Cheng |u School of Safety Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; zeyuan_hu@163.com (Z.H.); chen-zhang@njust.edu.cn (C.Z.) | |
| 700 | 1 | |a Wan, Yi |u School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China; wany@njust.edu.cn | |
| 700 | 1 | |a Ma, Rui |u School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China; marui@ahjzu.edu.cn | |
| 700 | 1 | |a Gu Chunping |u School of Civil Engineering, Zhejiang University of Technology, Hangzhou 310014, China; guchunping@zjut.edu.cn | |
| 700 | 1 | |a Xu, Yang |u Nanjing KENTOP Civil Engineering Co., Ltd., Nanjing 210041, China; xu_yang0917@163.com | |
| 700 | 1 | |a Dong Jianjun |u School of Safety Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; zeyuan_hu@163.com (Z.H.); chen-zhang@njust.edu.cn (C.Z.) | |
| 700 | 1 | |a Cui Dong |u School of Safety Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; zeyuan_hu@163.com (Z.H.); chen-zhang@njust.edu.cn (C.Z.) | |
| 773 | 0 | |t Nanomaterials |g vol. 15, no. 18 (2025), p. 1432-1453 | |
| 786 | 0 | |d ProQuest |t Materials Science Database | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3254622283/abstract/embedded/6A8EOT78XXH2IG52?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text + Graphics |u https://www.proquest.com/docview/3254622283/fulltextwithgraphics/embedded/6A8EOT78XXH2IG52?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3254622283/fulltextPDF/embedded/6A8EOT78XXH2IG52?source=fedsrch |