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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Calabria-Holley, Juliana
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Improving the pozzolanic reactivity of clay, marl and obsidian through mechanochemical or thermal activationcitations
- 2022The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonitecitations
- 2021Investigation of the variability in the components of natural plant fibres subjected to hornification cycles
- 2019Resilient hemp shiv aggregates with engineered hygroscopic properties for the building industrycitations
- 2019Resilient hemp shiv aggregates with engineered hygroscopic properties for the building industrycitations
- 2019Autogenous self-healing of fibre cements
- 2019Development of novel building composites based on hemp and multi-functional silica matrixcitations
- 2019Development of novel building composites based on hemp and multi-functional silica matrixcitations
- 2019ICE Themes Low Carbon Concrete
- 2018Effect of recycled geopolymer concrete aggregate on strength development and consistence of Portland cement concretes
- 2018Concretes incorporating recycled geopolymer aggregate - Implications and properties correlations
- 2018Chemical aspects related to using recycled geopolymers as aggregatescitations
- 2018Modification of hemp shiv properties using water-repellent sol–gel coatingscitations
- 2018Modification of Hemp Shiv Properties using Water-repellent Sol-gel Coatingscitations
- 2016The effects of sol-gel silicates on hydration kinetics and microstructure of Portland cement systems
- 2015Effects of nanosilica on the calcium silicate hydrates in Portland cement–fly ash systemscitations
- 2015Effect of nanolimestone particles on hydration and flexural strength of Portland limestone cement pastes
- 2015Sol-Gel Technology as a Seeding Agent for Portland Cement Systems
- 2015A comprehensive review of the models on the nanostructure of calcium silicate hydratescitations
- 2014The effect of the addition of nanoparticles of silica on the strength and microstructure of blended Portland cement pastes
- 2014Прочность и микроструктура цементного камня c добавками коллоидного SiO2
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booksection
ICE Themes Low Carbon Concrete
Abstract
Cementitious materials have a complex chemistry and naturally form nanostructures in the hydration process, a network of calcium silicate hydrates. It is considered that nanoparticles such as nanosilica could act as a pozzolanic material as well as a seeding agent for nucleation and acceleration of the formation of the calcium silicate hydrate network. This work evaluates the effect of nanosilica on the calcium silicate hydrate network and microstructure of hardened ternary, quaternary and quinary system Portland cement based pastes. The quinary system, containing Portland cement, limestone, fly ash, microsilica and nanosilica, and ternary combinations (Portland cement, limestone and fly ash) showed mean calcium/silicon atomic ratios of the calcium silicate hydrate gel in the 28 d old hardened paste of 1·2 and 2·3 respectively. Fourier transform infrared spectroscopy results show the presence of the bridging silicate tetrahedra (Q2) characteristic of a peak at around 980 cm−1 and a shoulder at around 1060 cm−1 in the calcium silicate hydrate gel network of the ternary, quaternary and quinary combinations; these bands are thus more pronounced for the nanosilica-enhanced formulations. The sample obtained in the presence of microsilica and nanosilica (quinary combination) showed evidence of a more intricate calcium silicate hydrate gel network (bridging tetrahedra) characteristic of a honeycomb-like structure opposed to the ternary combination (control sample).<br/><br/>Keywords: cement combinations, micro silica, nanosilica, pozzolanicity effect, microstructure development, calcium silicate hydration network<br/>