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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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Journal ArticleDOI
TL;DR: In this paper, a comparative study of the effects of nanosilica particles on the fresh state properties of a Portland cement paste designed for 3D printing is presented. But the results show that even though nanosilicica particles are more efficient thickeners for cement paste than the other particles studied, their effect is constrained by the maximum and minimum printing velocities.

62 citations

Journal ArticleDOI
TL;DR: In this paper, the reactivity of varying types of silica was evaluated based on their specific surface area, surface silanol group density, content of silanol groups and solubility in an alkaline suspension.

62 citations

01 Jan 1993
TL;DR: In this paper, the authors examined the microstructural characteristics of the interfacial region around aggregate particles in concrete and explored the influence of this interfacial zone on some of the properties of concrete such as the compressive strength, the water transport capacity, and the diffusion of ions into concretes prepared with and without mineral additives.
Abstract: This is a report of a study that examined the microstructural characteristics of the interfacial region around aggregate particles in concrete The study also explored the influence of this interfacial zone on some of the properties of concrete such as the compressive strength, the water transport capacity, and the diffusion of ions into concretes prepared with and without mineral additives The literature review is described, as well as the materials and the experimental methods The micro-characteristics of the interfacial zone in portland cement mortars and concrete are described, as well as the effects of the interfacial zone on diffusion of ions in concrete The effects of mineral additives on the cement paste-aggregate interfacial zone in concrete, and the influence of pozzolans on the interfacial zone in relationship to the transport of water and the diffusion of ions in concrete are covered The study also covered the effects of silica fume and metakaolinite on the interfacial zone with respect to the strength of mortars

62 citations

Journal ArticleDOI
TL;DR: In this article, the authors used acrylic dispersion as an admixture in the amount of 15% by mass of cement in order to improve the tensile properties of short carbon fibers.

62 citations

Journal ArticleDOI
TL;DR: In this paper, the authors compared the pozzolanic behavior of sugar cane bagasse ash-SCBA by comparing it to amorphous and crystalline silica and found that the reaction is slow and does not consume all the material.
Abstract: The present paper aims to clarify the pozzolanic behavior of sugar cane bagasse ash-SCBA by comparing it to amorphous and crystalline silica. It is shown that calcium silicate hydrate is formed in lime solution with SCBA but the reaction is slow and does not consume all the material. Comparing its results with the obtained in tests with silica fume and with crushed quartz show a better agreement with the latter. Characterization of cement pastes shows 20% of cement replacement by sugar cane bagasse ash leads to only a minor reduction in the amount of calcium hydroxide formed. This behavior is also closer to the observed in quartz than in silica fume. The results suggest SCBA should be used as a replacement for inert constituents in cement composites rather than pozzolanic addition. Analysis of the microstructure of the cement pastes revealed the presence of calcium hydroxide in samples prepared with partial replacement by silica fume, quartz and sugar cane bagasse ash. The presence of this phase in the sample prepared with silica fume was attributed to agglomeration of the particles that affected the reactivity of this material.

62 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023485
2022944
2021621
2020726
2019779