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...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/22/6970 |
| _version_ | 1797509500309078016 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:18:38Z |
| format | Article |
| id | doaj.art-48a5a4c9733942b4852928900530b6b2 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T05:18:38Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-48a5a4c9733942b4852928900530b6b22023-11-23T00:11:41ZengMDPI AGMaterials1996-19442021-11-011422697010.3390/ma14226970Cement Paste Mixture Proportioning with Particle Packing Theory: An Ambiguous Effect of MicrosilicaPaweł Niewiadomski0Anna Karolak1Damian Stefaniuk2Aleksandra Królicka3Jacek Szymanowski4Łukasz Sadowski5Faculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandFaculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandFaculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandDepartment of Metal Forming, Welding and Metrology, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandFaculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandFaculty of Civil Engineering, Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, PolandRecently, 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.https://www.mdpi.com/1996-1944/14/22/6970packing density modelmicrosilicananoparticlescement pastephysical propertiesmechanical properties |
| spellingShingle | 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 Materials packing density model microsilica nanoparticles cement paste physical properties mechanical properties |
| title | 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_short | 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 |
| topic | packing density model microsilica nanoparticles cement paste physical properties mechanical properties |
| url | https://www.mdpi.com/1996-1944/14/22/6970 |
| work_keys_str_mv | AT pawełniewiadomski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT annakarolak cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT damianstefaniuk cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT aleksandrakrolicka cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT jacekszymanowski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica AT łukaszsadowski cementpastemixtureproportioningwithparticlepackingtheoryanambiguouseffectofmicrosilica |