SCC modification by use of amorphous nano-silica

G. Quercia Bianchi; P.R. Spiesz; G. Hüsken; H.J.H. Brouwers

doi:10.1016/j.cemconcomp.2013.09.001

SCC modification by use of amorphous nano-silica

G. Quercia Bianchi, P.R. Spiesz, G. Hüsken, H.J.H. Brouwers

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Abstract

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.

Original language	English
Pages (from-to)	69-81
Number of pages	13
Journal	Cement & Concrete Composites
Volume	45
DOIs	https://doi.org/10.1016/j.cemconcomp.2013.09.001
Publication status	Published - 2014

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title = "SCC modification by use of amorphous nano-silica",

abstract = "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.",

author = "{Quercia Bianchi}, G. and P.R. Spiesz and G. H{\"u}sken and H.J.H. Brouwers",

year = "2014",

doi = "10.1016/j.cemconcomp.2013.09.001",

language = "English",

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journal = "Cement & Concrete Composites",

issn = "0958-9465",

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T1 - SCC modification by use of amorphous nano-silica

AU - Quercia Bianchi, G.

AU - Spiesz, P.R.

AU - Hüsken, G.

AU - Brouwers, H.J.H.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

U2 - 10.1016/j.cemconcomp.2013.09.001

DO - 10.1016/j.cemconcomp.2013.09.001

M3 - Article

VL - 45

SP - 69

EP - 81

JO - Cement & Concrete Composites

JF - Cement & Concrete Composites

SN - 0958-9465

ER -