Topic
Silica fume
About: Silica fume is a research topic. Over the lifetime, 10177 publications have been published within this topic receiving 173857 citations.
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TL;DR: In this paper, the influence of the steel fiber and carbon fiber additions on the mechanical properties of concrete containing silica fume has been studied, focusing on its passive material damping ability (damping ratio) and dynamic properties.
75 citations
TL;DR: In this paper, the authors determined the changes in the hydration process of cement paste as increasing amounts of silica fume are incorporated at high and low w/(c+sf) ratios.
75 citations
TL;DR: In this paper, the influence of three fundamentally different durability enhancing products, viz. microsilica, controlled permeability formwork and silane, on some of the physical properties of near surface concrete was investigated.
74 citations
TL;DR: In this article, a composite mineral admixture was prepared by grinding a mixture of steel slag and silica fume (steel slag/silica Fume ratio is 92:8 or 84:16, by mass).
74 citations
TL;DR: In this article, the porosity of a porosity-based geopolymer is controlled with temperature, repeated temperature cycles and the mass introduced, and the thermal conductivity values of the foams were evaluated using a fluxmeter method.
Abstract: Porous potassium based geopolymers with a mutli-scale porosity were synthesized. Silica fume is introduced as an additive to the geopolymer formulation. The free silicon contained inside this silica fume is oxidized in alkaline solution, releasing molecular hydrogen which generates the porosity. Previous work has shown how the porosity can be controlled with temperature, repeated temperature cycles and the mass introduced. Using this protocol, homogeneous foams were made and then studied with scanning electron microscopy. In particular the foam expansion has been followed with time in relation to the microstructure. The thermal conductivity values of the foams were evaluated using a fluxmeter method. The effective thermal conductivities are comprised between 0.12 and 0.35 W m−1 K−1 for apparent densities ranging from 0.40 to 0.85 g cm−3. The corresponding calculated pore volume fractions are in the range of 65–85%. The interest of this material is that it combines the advantages of low bulk density and insulating properties with the characteristics of a geopolymer skeleton. Literature reports a very good fire and acid/base resistance, a low cost of production and the possibility of recycling industrial waste in the form of silica fume.
74 citations