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, the effect of solid concentration, high-range water-reducer (HRWR), and shear rate regime on pseudoplastic behavior of high-performance cement grouts was investigated.
60 citations
TL;DR: The tensile strength of cement paste was increased by 56% and the modulus and ductility were increased by 39% by using silane treated carbon fibers and silane-treated silica fume as mentioned in this paper.
60 citations
TL;DR: In this paper, metakaolin was partially replaced with two waste materials and the effect of adding those materials on the behavior of the resulted geopolymer composites was investigated regarding physical properties.
60 citations
01 Jan 2009
TL;DR: In this article, the effect of surface treatment and admixture addition on the incorporation of carbon nanofibers (CNFs) in cement composites was studied, and the results indicated a residual effect of the CNFs after decalcification of the composites as manifested by a slow load dissipation after peak load under compression.
Abstract: This paper reports on recent work that is directed at understanding the fundamental controlling mechanisms of multi-scale, environmental weathering of nano-structured cement-based materials through an integrated experimental and computational program. The effect of surface treatment and admixture addition on the incorporation of carbon nanofibers (CNFs) in cement composites was studied. Silica fume and surface treatment with nitric acid facilitated CNF dispersion. The CNFs were found as individual fibers anchored in the hydration products throughout the cement pastes and as entangled networks in cavities. The presence of the CNFs did not modify the compressive or tensile strength of the composite but did provide it with a fair level of mechanical integrity post testing. Preliminary results on durability indicated a residual effect of the CNFs after decalcification of the composites as manifested by a slow load dissipation after peak load under compression. Molecular dynamics modeling of the reinforcing structure-cement phase interface demonstrated that manipulation of the interface characteristics may provide a method to control the composite properties.
60 citations
TL;DR: In this paper, the effects of nano silica, micro silica and combined nano-silica and micro-silicon (MS) on the bond behaviour of steel and polypropylene (PP) fibres in high volume fly ash (HVFA) mortar were investigated.
59 citations