| People | Locations | Statistics |
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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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Paine, Kevin A.
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (49/49 displayed)
- 2023Nanomontmorillonite Reinforced Fibre Cements and Nanomontmorillonite-Nanosilica Reinforced Mortarscitations
- 2023Insights into the piezoceramic electromechanical impedance response for monitoring cement mortars during water saturation curingcitations
- 2023Assessing the potential application of bacteria-based self-healing cementitious materials for enhancing durability of wastewater treatment infrastructurecitations
- 2022The Effect of Bacteria on Early Age Strength of CEM I and CEM II Cementitious Compositescitations
- 2022Effect of fibre loading on the microstructural, electrical, and mechanical properties of carbon fibre incorporated smart cement-based compositescitations
- 2022Air-entraining admixtures as a protection method for bacterial spores in self-healing cementitious compositescitations
- 2021Investigation of the variability in the components of natural plant fibres subjected to hornification cycles
- 2021Incorporation of bacteria in concrete: the case against MICP as a means for strength improvementcitations
- 2021Using bacteria for early-age strength improvement of concrete
- 2021Waste-Based porous materials as water reservoirs for the internal curing of Concrete. A reviewcitations
- 2021Calcite precipitation by environmental bacteria as a method to improve durability of cementitious materials
- 2020A step by step methodology for building sustainable cementitious matricescitations
- 2019Autogenous self-healing of fibre cements
- 2019In-depth profiling of calcite precipitation by environmental bacteria reveals fundamental mechanistic differences with relevance to self-healing applications
- 2019Sensing of damage and repair of cement mortar using electromechanical impedancecitations
- 2019In-depth profiling of calcite precipitation by environmental bacteria reveals fundamental mechanistic differences with relevance to applicationcitations
- 2019Optimization of low carbon footprint quaternary and quinary (37% fly ash) cementitious nanocomposites with polycarboxylate or aqueous nanosilica particlescitations
- 2019Permeable nanomontmorillonite and fibre reinforced cementitious binderscitations
- 2019ICE Themes Low Carbon Concrete
- 2019From Nanostructural Characterization of Nanoparticles to Performance Assessment of Low Clinker Fibre-Cement Nanohybridscitations
- 2018Pore-structure and microstructural investigation of organomodified/Inorganic nano-montmorillonite cementitious nanocompositescitations
- 2018Lowering cement clinker:citations
- 2018Physical and mechanical properties of plasters incorporating aerogel granules and polypropylene monofilament fibrescitations
- 2018Chemical aspects related to using recycled geopolymers as aggregatescitations
- 2018Polycarboxylate / nanosilica modified quaternary cement formulations - enhancements and limitationscitations
- 2017Construction, demolition and excavation waste management in EU/Greece and its potential use in concrete
- 2017Alkaliphilic Bacillus species show potential application in concrete crack repair by virtue of rapid spore production and germination then extracellular calcite formationcitations
- 2017Inorganic and organomodified nano-montmorillonite dispersions for use as supplementary cementitious materialscitations
- 2016The effects of sol-gel silicates on hydration kinetics and microstructure of Portland cement systems
- 2016Investigation of the Recycling of Geopolymer Cement wastes as Fine Aggregates in Mortar Mixes
- 2016Chemical aspects related to using recycled geopolymers as an aggregate
- 2016Recycling of fly ash-slag Geopolymer binder in mortar mixes
- 2015Dispersed Inorganic or Organomodified Montmorillonite Clay Nanoparticles for Blended Portland Cement Pastescitations
- 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
- 2015The environmental credentials of hydraulic lime-pozzolan concretescitations
- 2015Structural and durability properties of hydraulic lime-pozzolan concretescitations
- 2015RC structural walls under cyclic loading - Experimental verification of code overestimation of transverse reinforcement reduction potentials
- 2015Sol-Gel Technology as a Seeding Agent for Portland Cement Systems
- 2015A comprehensive review of the models on the nanostructure of calcium silicate hydratescitations
- 2014Strength and deformation characteristics of concrete containing recycled aggregate fines
- 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
- 2013Investigations on cementitious composites based on rubber particle waste additionscitations
- 2013The potential for using geopolymer concrete in the UKcitations
- 2012The feasibility and potential of modern hydraulic lime concretes
- 2005Experimental study and modelling of heat evolution of blended cementscitations
- 2005Early-age temperature rises in GGBS concrete - Part 2
- 2005Engineering property and structural design relationships for new and developing concretescitations
Places of action
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article
Прочность и микроструктура цементного камня c добавками коллоидного SiO2
Abstract
The macrolevel properties of concrete; strength and durability are dependent on the hydration of cement. The main products of the chemical reactions of cement clinker with water, are calcium silicate hydrates (C-S-H), calcium aluminate hydrates and calcium hydroxide. C-S-H, the major binding and strengthening factor within the hydrating cement paste, is nanosized. Therefore, it is believed that the addition of nanoparticles can modify the characteristics of the C-S-H in nanoenhanced pastes, inducing subsequent alterations at larger scale phenomena. In this research the addition of nanoparticles of silica, referred to as nanosilica (nS) to blended cement formulations was investigated with the aim of enhancing durability and lowering environmental impact. The hydration products, microstructure and compressive strength of the early and later ages (from 1 day until half a year old) hardened cement paste were compared in a series of cement pastes. The reference paste contained Portland limestone cement and additional limestone (summing up to 60% Portland cement and 40% limestone by mass) and the nS enhanced pastes contained nanosilica at 0.1%, 0.5%, 1% and 1.5% by mass of solids. The water to binder ratio was kept constant at 0.3. The size of nanosilica was confirmed by transmission electron microscopy to be in the order of 8 nm to 50 nm, diameter. Performance evaluation of the pastes, indicated that nS exhibits a pozzolanic behaviour consuming calcium hydroxide to form additional C-S-H. Additionally, for pastes with 40% substitution of cement by limestone, low nS content (0.1% to 0.5%) is favouring strength gain even at later ages. Thermogravimetric analyses and scanning electron microscopy provided a further justification of the above hypothesis. The research reported was part of a much broader research project supported by the EU, and involving industrial and academic partners throughout Europe, to investigate nanotechnology enhanced cements.