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 article, a comprehensive study on the mechanical properties of expansive-cement concrete containing silica fume and polypropylene fibers was performed, and the results showed that the use of 5% silica and 10% fiber volume fraction results in optimum mixture design for repair applications from the standpoints of workability, bond, strength, length change and permeability.
130 citations
TL;DR: In this paper, the carbonation resistance of mortar and concrete is measured by the ratio between water added during production and the amount of reactive CaO present in the binder (w/CaO active).
Abstract: When cement with mineral additions is employed, the carbonation resistance of mortar and concrete may be decreased. In this study, mortars containing mineral additions are exposed both to accelerated carbonation (1% and 4% CO2) and to natural carbonation. Additionally, concrete mixtures produced with different cements, water-to-cement ratios and paste volumes are exposed to natural carbonation. The comparison of the carbonation coefficients determined in the different exposure conditions indicates that mortar and concrete containing slag and microsilica underperform in the accelerated carbonation test compared to field conditions. The carbonation resistance in mortar and concrete is mainly governed by the CO2 buffer capacity per volume of cement paste. It can be expressed by the ratio between water added during production and the amount of reactive CaO present in the binder (w/CaOreactive) resulting in a novel parameter to assess carbonation resistance of mortar and concrete containing mineral additions.
130 citations
TL;DR: In this article, the effects of foam content as well as fly ash and silica fume inclusion on some physical and mechanical properties of foam concrete, subjected to various curing regimes, were researched.
130 citations
TL;DR: In this article, the physical properties, compressive strength and drying shrinkage of multi-blended cement under different curing methods were studied for 28 days and the results showed that absorption and volume of permeable pore space (voids) of blended cement mortars at 28-day under all curing methods tend to increase with increasing silica fume replacement.
130 citations
TL;DR: In this article, the effect of silica fume (SF) content, varying between 0 and 12%, by mass of binder, on hydration heat, hydration products and pore structure of LHP cement-based materials were investigated by isothermal calorimetry, thermal analysis, and mercury intrusion porosimetry (MIP), respectively.
130 citations