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Reduction of the Calcium Leaching Rate of Cement Paste by Addition of Silica Nanoparticles
Calcium leaching is a degradation process that consists in the progressive dissolution of the cement paste as a consequence of the migration of the calcium ions to the aggressive solution. AlthoughExpand
Atomic force microscopy and nanoindentation of cement pastes with nanotube dispersions
Since their discovery in 1991 by lijima [1], carbon nanotubes (CNTs) have probably become the most promising nanomaterials due to their unique mechanical, electronic and chemical properties. Our aimExpand
Comparative Study of the Effects of Microsilica and Nanosilica in Concrete
It is well recognized that the use of mineral admixtures such as silica fume enhances the strength and durability of concrete. This research compares the effects of adding silica fume and nanosilicaExpand
Effect of addition of silica- and amine functionalized silica-nanoparticles on the microstructure of calcium silicate hydrate (C-S-H) gel.
In this work we study the influence of adding nano-silica (SiO2, Nyasil™) and aminopropyl (-(CH2)3-NH2,) functionalized silica nanoparticles (Stoga) during the synthesis of calcium-silicate-hydrateExpand
Characterisation of cement pastes with innovative self-healing system based in epoxy-amine adhesive
Abstract Two innovative additions are considered for the development of self-healing concrete: epoxy-containing silica microcapsules and amine-functionalized nanosilica. The effect of twoExpand
Synthesis and characterization of epoxy encapsulating silica microcapsules and amine functionalized silica nanoparticles for development of an innovative self-healing concrete
Abstract Silica microcapsules encapsulating an epoxy compound (CAP) and silica nanoparticles functionalized by an amine group (NS) are synthesized to be used as self-healing system for smartExpand
Development of ultra-high performance concretes with self-healing micro/nano-additions
Abstract UHPC are developed in present paper incorporating an innovative self-healing system based on two micro/nano-additions: silica microcapsules containing epoxy sealing compound (CAP) and amineExpand
Small Changes Can Make a Great Difference
Four different types of commercially available silica nanoparticles were added to ordinary portland cement pastes to study their effects. The subsequent multiscale characterization of the materialExpand
Structural characterization of C-S-H gel through an improved deconvolution analysis of NMR spectra
The structure of the C-S-H gel in hydrated cement samples prepared with and without the addition of silica nanoparticles is studied in this work through the deconvolution of 29Si MAS-NMR spectra.Expand
Durability of self-healing ultra-high-strength reinforced micro-concrete under freeze–thaw or chloride attack
The durability of an innovative self-healing micro-concrete in aggressive environments simulated by freeze–thaw cycles and salt spray test is studied. Tests are conducted on an ultra-high-strength ...