Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica

Recently, the research of innovative building materials is focused on applying supplementary materials in the form of micro- and nanopowders in cementitious composites due to the growing insistence on sustainable development. Considering above, in paper, a research on the effect of microsilica and S...

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Autores principales:	Paweł Niewiadomski, Anna Karolak, Damian Stefaniuk, Aleksandra Królicka, Jacek Szymanowski, Łukasz Sadowski
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	packing density model microsilica nanoparticles cement paste physical properties mechanical properties 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/48a5a4c9733942b4852928900530b6b2
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spelling	oai:doaj.org-article:48a5a4c9733942b4852928900530b6b22021-11-25T18:15:18ZCement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica10.3390/ma142269701996-1944https://doaj.org/article/48a5a4c9733942b4852928900530b6b22021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6970https://doaj.org/toc/1996-1944Recently, the research of innovative building materials is focused on applying supplementary materials in the form of micro- and nanopowders in cementitious composites due to the growing insistence on sustainable development. Considering above, in paper, a research on the effect of microsilica and SiO<sub>2</sub> nanoparticles addition to cement paste, designed with Andreasen and Andersen (AA) packing density model (PDM), in terms of its physical and mechanical properties was conducted. Density, porosity, compressive strength, hardness, and modulus of indentation were investigated and compared regarding different amount of additives used in cement paste mixes. Microstructure of the obtained pastes was analyzed. The possibility of negative influence of alkali-silica reaction (ASR) on the mechanical properties of the obtained composites was analyzed. The results of the conducted investigations were discussed, and conclusions, also practical, were presented. The obtained results confirmed that the applied PDM may be an effective tool in cement paste design, when low porosity of prepared composite is required. On the other hand, the application of AA model did not bring satisfactory results of mechanical performance as expected, what was related, as shown by SEM imaging, with inhomogeneous dispersion of microsilica, and creation of agglomerates acting as reactive aggregates, what as a consequence caused ASR reaction, crack occurrence and lowered mechanical properties. Finally, the study found that the use of about 7.5% wt. of microsilica is the optimum in regards to obtain low porosity, while, to achieve improved mechanical properties, the use of 4 wt. % of microsilica seems to be optimal, in the case of tested cement pastes.Paweł NiewiadomskiAnna KarolakDamian StefaniukAleksandra KrólickaJacek SzymanowskiŁukasz SadowskiMDPI AGarticlepacking density modelmicrosilicananoparticlescement pastephysical propertiesmechanical propertiesTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6970, p 6970 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	packing density model microsilica nanoparticles cement paste physical properties mechanical properties 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	packing density model microsilica nanoparticles cement paste physical properties mechanical properties 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 Paweł Niewiadomski Anna Karolak Damian Stefaniuk Aleksandra Królicka Jacek Szymanowski Łukasz Sadowski Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
description	Recently, the research of innovative building materials is focused on applying supplementary materials in the form of micro- and nanopowders in cementitious composites due to the growing insistence on sustainable development. Considering above, in paper, a research on the effect of microsilica and SiO<sub>2</sub> nanoparticles addition to cement paste, designed with Andreasen and Andersen (AA) packing density model (PDM), in terms of its physical and mechanical properties was conducted. Density, porosity, compressive strength, hardness, and modulus of indentation were investigated and compared regarding different amount of additives used in cement paste mixes. Microstructure of the obtained pastes was analyzed. The possibility of negative influence of alkali-silica reaction (ASR) on the mechanical properties of the obtained composites was analyzed. The results of the conducted investigations were discussed, and conclusions, also practical, were presented. The obtained results confirmed that the applied PDM may be an effective tool in cement paste design, when low porosity of prepared composite is required. On the other hand, the application of AA model did not bring satisfactory results of mechanical performance as expected, what was related, as shown by SEM imaging, with inhomogeneous dispersion of microsilica, and creation of agglomerates acting as reactive aggregates, what as a consequence caused ASR reaction, crack occurrence and lowered mechanical properties. Finally, the study found that the use of about 7.5% wt. of microsilica is the optimum in regards to obtain low porosity, while, to achieve improved mechanical properties, the use of 4 wt. % of microsilica seems to be optimal, in the case of tested cement pastes.
format	article
author	Paweł Niewiadomski Anna Karolak Damian Stefaniuk Aleksandra Królicka Jacek Szymanowski Łukasz Sadowski
author_facet	Paweł Niewiadomski Anna Karolak Damian Stefaniuk Aleksandra Królicka Jacek Szymanowski Łukasz Sadowski
author_sort	Paweł Niewiadomski
title	Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
title_short	Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
title_full	Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
title_fullStr	Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
title_full_unstemmed	Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica
title_sort	cement paste mixture proportioning with particle packing theory: an ambiguous effect of microsilica
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/48a5a4c9733942b4852928900530b6b2
work_keys_str_mv	AT pawełniewiadomski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT annakarolak cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT damianstefaniuk cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT aleksandrakrolicka cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT jacekszymanowski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT łukaszsadowski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica
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Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of Microsilica

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