Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry
Siliceous fly ash (FA) is the main additive to currently produced concretes. The utilization of this industrial waste carries an evident pro-ecological factor. In addition, such actions have a positive effect on the structure and mechanical parameters of mature concrete. Unfortunately, the problem o...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-10-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/21/6514 |
| _version_ | 1797512155054997504 |
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| author | Grzegorz Ludwik Golewski Bartosz Szostak |
| author_facet | Grzegorz Ludwik Golewski Bartosz Szostak |
| author_sort | Grzegorz Ludwik Golewski |
| collection | DOAJ |
| description | Siliceous fly ash (FA) is the main additive to currently produced concretes. The utilization of this industrial waste carries an evident pro-ecological factor. In addition, such actions have a positive effect on the structure and mechanical parameters of mature concrete. Unfortunately, the problem of using FA as a Portland cement replacement is that it significantly reduces the performance of concretes in the early stages of their curing. This limits the possibility of using this type of concrete, e.g., in prefabrication, where it is required to obtain high-strength composites after short periods of curing. In order to minimize these negative effects, this research was undertaken to increase the early strength of concretes with FA through the application of a specifically formulated chemical nano-admixture (NA) in the form of seeds of the C-S-H phase. The NA was used to accelerate the strength growth in concretes. Therefore, this paper presents results of tests of modified concretes both with the addition of FA and with innovative NA. The analyses were carried out based on the results of the macroscopic and microstructural tests in five time periods, i.e., after 4, 8, 12, 24 and 72 h. The results of tests carried out with the use of NA clearly indicate the possibility of using FA in a wide range of management areas in sustainable concrete prefabrication. |
| first_indexed | 2024-03-10T05:57:51Z |
| format | Article |
| id | doaj.art-76b466ac1964409cb429a89c537b1622 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:57:51Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-76b466ac1964409cb429a89c537b16222023-11-22T21:13:16ZengMDPI AGMaterials1996-19442021-10-011421651410.3390/ma14216514Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete IndustryGrzegorz Ludwik Golewski0Bartosz Szostak1Department of Structural Engineering, Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40 Str, 20-618 Lublin, PolandDepartment of Conservation of Built Heritage, Faculty of Civil Engineering and Architecture, Lublin University of Technology, Nadbystrzycka 40 Str, 20-618 Lublin, PolandSiliceous fly ash (FA) is the main additive to currently produced concretes. The utilization of this industrial waste carries an evident pro-ecological factor. In addition, such actions have a positive effect on the structure and mechanical parameters of mature concrete. Unfortunately, the problem of using FA as a Portland cement replacement is that it significantly reduces the performance of concretes in the early stages of their curing. This limits the possibility of using this type of concrete, e.g., in prefabrication, where it is required to obtain high-strength composites after short periods of curing. In order to minimize these negative effects, this research was undertaken to increase the early strength of concretes with FA through the application of a specifically formulated chemical nano-admixture (NA) in the form of seeds of the C-S-H phase. The NA was used to accelerate the strength growth in concretes. Therefore, this paper presents results of tests of modified concretes both with the addition of FA and with innovative NA. The analyses were carried out based on the results of the macroscopic and microstructural tests in five time periods, i.e., after 4, 8, 12, 24 and 72 h. The results of tests carried out with the use of NA clearly indicate the possibility of using FA in a wide range of management areas in sustainable concrete prefabrication.https://www.mdpi.com/1996-1944/14/21/6514sustainable precast concreteprefabricationsiliceous fly ashnano-admixturemechanical propertiesmicrostructure |
| spellingShingle | Grzegorz Ludwik Golewski Bartosz Szostak Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry Materials sustainable precast concrete prefabrication siliceous fly ash nano-admixture mechanical properties microstructure |
| title | Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry |
| title_full | Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry |
| title_fullStr | Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry |
| title_full_unstemmed | Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry |
| title_short | Application of the C-S-H Phase Nucleating Agents to Improve the Performance of Sustainable Concrete Composites Containing Fly Ash for Use in the Precast Concrete Industry |
| title_sort | application of the c s h phase nucleating agents to improve the performance of sustainable concrete composites containing fly ash for use in the precast concrete industry |
| topic | sustainable precast concrete prefabrication siliceous fly ash nano-admixture mechanical properties microstructure |
| url | https://www.mdpi.com/1996-1944/14/21/6514 |
| work_keys_str_mv | AT grzegorzludwikgolewski applicationofthecshphasenucleatingagentstoimprovetheperformanceofsustainableconcretecompositescontainingflyashforuseintheprecastconcreteindustry AT bartoszszostak applicationofthecshphasenucleatingagentstoimprovetheperformanceofsustainableconcretecompositescontainingflyashforuseintheprecastconcreteindustry |