期刊
CEMENT & CONCRETE COMPOSITES
卷 45, 期 -, 页码 69-81出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2013.09.001
关键词
Nano-silica; Self compacting concrete; Durability; Chloride; Freeze-thaw
资金
- Materials innovation institute [M81.1.09338]
- European Community in Europe [228559]
- Rijkswaterstaat Grote Projecten en Onderhoud
- Graniet-Import Benelux
- Kijlstra Betonmortel
- Struyk Verwo
- Attero
- ENCI
- Provincie Overijssel
- Rijkswaterstaat Zee en Delta - District Noord
- AG Maasvlakte
- BTE
- Alvon Bouwsystemen
- V.d. Bosch Beton
- Selor
- Twee R Recycling
- GMB
- Schenk Concrete Consultancy
- Geochem Research
- Icopal
- BN International
- APP All Remove
- Consensor
- Eltomation
- Knauf Gips
- Hess ACC Systems
- Kronos
- Joma international
In this study two different types of nano-silica (nS) were applied in self-compacting concrete (SCC), both having similar particle size distributions (PSD), but produced through two different processes: fumed powder silica and precipitated silica in colloidal suspension. The influence of nano-silica on SCC was investigated with respect to the properties of concrete in fresh (workability) and hardened state (mechanical properties and durability). Additionally, the densification of the microstructure of the hardened concrete was verified by SEM and EDS analyses. The obtained results' demonstrate that nano-silica efficiently used in SCC can improve its mechanical properties and durability. Considering the reactivity of the two applied nano-silicas, the colloidal type showed a higher reactivity at early age, which influenced the final SCC properties. (C) 2013 Elsevier Ltd. All rights reserved.
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