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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01 Jan 2009
TL;DR: The effect of nano-scale non-reactive anatase titanium dioxide (TiO2) on early age hydration of cement was experimentally studied in this article, where the authors demonstrate that the addition of nonreactive nanoscale fillers could affect the rate of cement hydration by heterogeneous nucleation.
Abstract: The effect of nano-scale non-reactive anatase titanium dioxide (TiO2) on early age hydration of cement was experimentally studied Isothermal calorimetry was performed on cement pastes with two different particle sizes of TiO2 at replacement levels of 5, 75 and 10% The addition of TiO2 to cement increased the heat of hydration and accelerated the rate of reaction at early stages of hydration This increase was found to be proportional to the percentage addition and the fineness of TiO2 These results demonstrate that the addition of non-reactive nano-scale fillers could affect the rate of cement hydration by heterogeneous nucleation
84 citations
TL;DR: In this article, a comparative study was carried out of several mortars, in some cases using different additions of silica fume or activated fly ash, and the influence that these additives have on the mechanical resistance of the mortars was studied.
84 citations
TL;DR: In this article, the authors investigated the mechanical and durability properties of reactive powder concrete (RPC) composites and found that RPC had very low porosity and the diameter of the most probable pore was less than 10 nm.
84 citations
TL;DR: In this paper, the effects of replacing cement with colloidal amorphous silica nano-particles have been experimentally investigated on the physical and mechanical properties, durability and microstructure of concrete.
Abstract: In this study, effects of replacing cement with colloidal amorphous silica nano-particles have been experimentally investigated on the physical and mechanical properties, durability and microstructure of concrete. Experimental results include workability, fresh concrete density, and hardened concrete properties like compressive strength at different ages of 3, 7, and 28-days, and also 28-days splitting tensile strength. Furthermore, influence of silica nano-particles on durability and microstructure of concrete for 28-days specimens was tested by conducting water absorption test, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Analysis (EDAX), respectively. In order to study the effect of replacement of cement with silica nano-particles, specimens with 10%, 20%, and 30% cement reduction, and addition of 1%, 2%, and 3% silica nano-particles with respect to witness specimen were fabricated. Experimental results revealed that 20% reduction of cement combining 2% silica nano-particles...
84 citations
TL;DR: In this paper, compressive strength and sulfate resistance of mortars containing silica fume and/or limestone in different replacement levels were examined, and it was shown that negative effect of silica-fume on workability can be compensated by using limestone and silicafume together.
84 citations