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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Autores principales:	Grzegorz Ludwik Golewski, Bartosz Szostak
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	sustainable precast concrete prefabrication siliceous fly ash nano-admixture mechanical properties microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/76b466ac1964409cb429a89c537b1622
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spelling	oai:doaj.org-article:76b466ac1964409cb429a89c537b16222021-11-11T18:04:56ZApplication 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 Industry10.3390/ma142165141996-1944https://doaj.org/article/76b466ac1964409cb429a89c537b16222021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6514https://doaj.org/toc/1996-1944Siliceous 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.Grzegorz Ludwik GolewskiBartosz SzostakMDPI AGarticlesustainable precast concreteprefabricationsiliceous fly ashnano-admixturemechanical propertiesmicrostructureTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6514, p 6514 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sustainable precast concrete prefabrication siliceous fly ash nano-admixture mechanical properties microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	sustainable precast concrete prefabrication siliceous fly ash nano-admixture mechanical properties microstructure Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 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
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.
format	article
author	Grzegorz Ludwik Golewski Bartosz Szostak
author_facet	Grzegorz Ludwik Golewski Bartosz Szostak
author_sort	Grzegorz Ludwik Golewski
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_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_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_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
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/76b466ac1964409cb429a89c537b1622
work_keys_str_mv	AT grzegorzludwikgolewski applicationofthecshphasenucleatingagentstoimprovetheperformanceofsustainableconcretecompositescontainingflyashforuseintheprecastconcreteindustry AT bartoszszostak applicationofthecshphasenucleatingagentstoimprovetheperformanceofsustainableconcretecompositescontainingflyashforuseintheprecastconcreteindustry
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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

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