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 authors examined the behavior of 10 mixtures of self-compacting concrete (SCC) prepared with binary and ternary dosages through use of Portland cement (CEM I 52.5 R), mSi and nSi.
62 citations
TL;DR: The results indicated that air-entraining agent and silica fume have an important role in stabilization of fresh properties of the mixtures and a decrease in compressive strength, modulus of elasticity, and energy absorption of concrete mixtures containing air entrained agent.
Abstract: Today, the use of recycled aggregates as a substitute for a part of the natural aggregates in concrete production is increasing. This approach is essential because the resources for natural aggregates are decreasing in the world. In the present study, the effects of recycled concrete aggregates as a partial replacement for fine (by 50%) and coarse aggregates (by 100%) were examined in the self-compacting concrete mixtures which contain air-entraining agents and silica fumes. Two series of self-compacting concrete mixes have been prepared. In the first series, fine and coarse recycled mixtures respectively with 50% and 100% replacement with air entraining agent were used. In the second series, fine recycled (with 50% replacement) and coarse recycled (with 100% replacement) were used with silica fume. The rheological properties of the self-compacting concrete (SCC) were determined using slump-flow and J-ring tests. The tests of compressive strength, tensile strength, and compressive stress-strain behavior were performed on both series. The results indicated that air-entraining agent and silica fume have an important role in stabilization of fresh properties of the mixtures. The results of tests indicated a decrease in compressive strength, modulus of elasticity, and energy absorption of concrete mixtures containing air entrained agent. Also, the results showed that complete replacement (100%) with coarse recycled material had no significant effect on mechanical strength, while replacement with 50% fine recycled material has reduced compressive strength, tensile strength, and energy absorption.
62 citations
TL;DR: In this article, the effects of various pozzolanic binders such as silica fume, metakaoline and zeolite on self consolidating concrete (SCC) durability in magnesium sulfate environment were studied.
62 citations
TL;DR: In this article, the authors used polypropylene fiber (PP) to increase the mechanical properties of high strength concrete (HSC) mixes containing silica fume and showed that the addition of PP fiber intensifies the concrete up to 0.6%, where the increases in compressive strength of the 0, 50% and 100% RA were 20.8%, 15.2%, and 11.6% respectively.
62 citations
TL;DR: In this article, a plain and steel fibre reinforced geopolymer concrete (SFRGC) containing various types of commercial Silica Fume (SF) (densified, undensified and slurry silica fume) and varying Ground Granulated Blast Furnace Slag (GGBS) content in a ternary binder mixture, cured under ambient (room) temperature has been examined.
62 citations