Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements
To achieve the new level of blended cement performance, the slurries of Class C and F fly ash were mechano-chemically activated in a vibro-mill with superplasticizer and nanosilica. The resulting activated products were tested in mortars replacing up to 30% portland cement. The activation process re...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/14/2347 |
| _version_ | 1797444796633055232 |
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| author | Konstantin Sobolev Rani Pradoto Ismael Flores-Vivian Marina Kozhukhova Irina Zhernovskaya |
| author_facet | Konstantin Sobolev Rani Pradoto Ismael Flores-Vivian Marina Kozhukhova Irina Zhernovskaya |
| author_sort | Konstantin Sobolev |
| collection | DOAJ |
| description | To achieve the new level of blended cement performance, the slurries of Class C and F fly ash were mechano-chemically activated in a vibro-mill with superplasticizer and nanosilica. The resulting activated products were tested in mortars replacing up to 30% portland cement. The activation process resulted in the formation of nano-seed clusters and micronized ash particles that both significantly improve the early strength of mortars as well as allow for the replacement of portland cement with industrial by-products. A small amount, 0.1% (of a binder weight), of nanosilica was used in selected compositions to improve the process of activation and facilitate the formation of nano-seeds. Due to an intensive activation of fly ash in the vibro-mill and the formation of nano-seed hydration products, the increase in the heat of the hydration flux and improvement of the mechanical properties such as compressive strength, especially in the early stages of hardening, were achieved. It is envisioned that fly ash activation and the use of supplementary cementitious materials as a precursor can induce a denser structure of cementitious matrix due to better particle packing realized with the application of the nano-seed product, nanosilica, ultra-fine particles of fly ash, and the formation of a refined C-S-H structure realized with the incorporation of the nano-seed particles. |
| first_indexed | 2024-03-09T13:16:43Z |
| format | Article |
| id | doaj.art-a96af0e1ad144415a6e8853326e294e7 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:16:43Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-a96af0e1ad144415a6e8853326e294e72023-11-30T21:35:09ZengMDPI AGNanomaterials2079-49912022-07-011214234710.3390/nano12142347Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended CementsKonstantin Sobolev0Rani Pradoto1Ismael Flores-Vivian2Marina Kozhukhova3Irina Zhernovskaya4Department of Civil & Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USAConstruction and Engineering Management Research Group, Faculty of Civil & Environmental Engineering, Bandung Institute of Technology, Bandung 40132, IndonesiaFacultad de Ingeniería Civil, Universidad Autónoma de Nuevo León, San Nicolás de los Garza C.P. 66455, MexicoDepartment of Civil & Environmental Engineering, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USADepartment of Materials Science and Materials Technology, Belgorod State Technological University Named after Shoukhov, Belgorod 308012, RussiaTo achieve the new level of blended cement performance, the slurries of Class C and F fly ash were mechano-chemically activated in a vibro-mill with superplasticizer and nanosilica. The resulting activated products were tested in mortars replacing up to 30% portland cement. The activation process resulted in the formation of nano-seed clusters and micronized ash particles that both significantly improve the early strength of mortars as well as allow for the replacement of portland cement with industrial by-products. A small amount, 0.1% (of a binder weight), of nanosilica was used in selected compositions to improve the process of activation and facilitate the formation of nano-seeds. Due to an intensive activation of fly ash in the vibro-mill and the formation of nano-seed hydration products, the increase in the heat of the hydration flux and improvement of the mechanical properties such as compressive strength, especially in the early stages of hardening, were achieved. It is envisioned that fly ash activation and the use of supplementary cementitious materials as a precursor can induce a denser structure of cementitious matrix due to better particle packing realized with the application of the nano-seed product, nanosilica, ultra-fine particles of fly ash, and the formation of a refined C-S-H structure realized with the incorporation of the nano-seed particles.https://www.mdpi.com/2079-4991/12/14/2347blended cementactivationfly ashvibro-milltop-downnano-seed |
| spellingShingle | Konstantin Sobolev Rani Pradoto Ismael Flores-Vivian Marina Kozhukhova Irina Zhernovskaya Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements Nanomaterials blended cement activation fly ash vibro-mill top-down nano-seed |
| title | Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements |
| title_full | Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements |
| title_fullStr | Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements |
| title_full_unstemmed | Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements |
| title_short | Top-Down Production of Nano-Seeds from Activated Fly Ash Tuned for Enhancing the Early Strength in Blended Cements |
| title_sort | top down production of nano seeds from activated fly ash tuned for enhancing the early strength in blended cements |
| topic | blended cement activation fly ash vibro-mill top-down nano-seed |
| url | https://www.mdpi.com/2079-4991/12/14/2347 |
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