An experimental study on partial replacement of fly ash and silica fume on concrete Satyendra Kumar1, Mithun Kumar Rana2, Pushpendra Kumar Kushwaha3 1P.G ... Effect of Partial Replacement of Cement by Silica Fume on Hardened Concrete International Journal of Emerging Technology and Advanced Engineering (ISSN 2250-2459, Volume 2, Issue 8 ...
4. WHAT IS FLY ASH? Fly ash is a finely divided byproduct resulting from the combustion of coal in power plants. It contains large amounts of silica, alumina and small amount of unburned carbon, which pollutes environment. It is grey in colour and alkaline in nature. The particle size ranges between 1-100 microns. The specific gravity of FA lies between 1.9 and …
Güçlüer et al. investigated the effect of silica fume as a cement replacement, and fly ash was completely replaced with siliceous aggregates. In their study, 3%, 5%, 9%, and …
The aim of this research work is to investigate the optimum replacement of cement by silica fume and fly ash and to calculate the compressive strength of concrete. The cement has been replaced by fly ash and Silica fume varying in different percentage like 0%, 10%, 20%, 30%, 40% and 50% by weight of cement.
6. CHEMICAL COMPOSITION Chemical composition depends on the product being made by the furnace. Composition is also influenced by the furnace design. It is mostly made of silica having percentage of more than 80. The other chemical composition include Fe2O3,Al2O3,Cao,Na2O,K2o in small percentages. Unlike the other By- products like Fly …
the constituents of silica fume is tabulated in table 1. Finely ground fly ash was obtained from Maithon Power Ltd., Maithon. The physical and chemical analysis of the constituents of fly ash is tabulated in table 1. Table 1: Physical and Chemical Properties of OPC, Silica Fume and Fly Ash Properties Ordinary Portland Cement Silica Fume Fly Ash
The document summarizes an evaluation of the durability properties of recycled aggregate concrete incorporating fly ash and silica fume. ... higher strength reduction due to acid and sulfate exposure, and higher …
Concrete is enhanced by the addition of Silica fume & Fly ash in it. The adequate durability of concrete is ensured by the addition of Silica fume & Fly ash in concrete. In this study, we experimented that Silica fume & Fly ash is used as a partial replacement of cement in various combinations. The addition
PDF | On Dec 13, 2013, Imrose Bin Muhit and others published Effects of Silica Fume and Fly Ash as Partial Replacement of Cement on Water Permeability and Strength of High Performance Concrete ...
An investigation was undertaken to study the effects of fly ash and silica fume in concrete. Compressive strengths at different levels of replacements were found. ... Cement replacement levels by fly ash were 0, 10, 20, 30, and 40 percents and by silica fume were 0,4, 8, 12, and 16 percents. Thus a total of 25 mixtures were studied. Strengths ...
The inclusion of 5 to 15 percent silica fume also resulted in a great improvement in sulfate resistance, even though the intruded pore volume and proportion of large pores of diameter > 0.1 um were found to increase with the use of silica fume. An 80 percent replacement of cement by ground-granulated blast furnace slag increases the sulfate ...
The investigation revealed that the partial replacement of cement by silica fume will develop compressive strength, flexure strength and split tensile strength sufficient for construction...
In this work, to make the concrete coarse aggregate of size 20mm, fine aggregates sand of zone ІІ, Ordinary Portland cement (OPC), and Silica fume were mixed properly with appropriate ...
Alok (2016) studied the Partial Replacement of Cement in M-30 Concrete from Silica Fume and Fly Ash. Replacement levels of OPC by Silica Fume were 0%, 2.5%, 5%and 7.5% where replacement levels of Ordinary Portland cement by Fly Ash were 0%, 5%, 10% and 15% by weight. 1% super-plasticizer was used in all the test specimens for better workability
The maximum replacement of cement by silica fume and sugar cane bagasse ash is 10 % and 15% respectively. Maximum replacement of cement by rice husk ash is 25%. ... Effect of fly ash fineness on compressive strength and pore size of blended cement paste. Cem. Concr. Compos., 27 (4) (2005), pp. 425-428, 10.1016/j.cemconcomp.2004.07.003.
The study of the mechanical properties of high performance concrete mixed with silica fume aims to study the effect of adding silica fume as a partial replacement of cement on grades M60, M70 and ...
A Literature Review on Study of Silica fume as Partial Replacement of Cement in Concrete Abhinav Shyam1, Abdullah Anwar2, Syed Aqeel Ahmad3 1M. Tech (Research Scholar), ... cement ratio and to identify the sharp effects of Silica Fume and Fly Ash on the properties of concrete. Water-cement ratio was kept 0.43 in all cases.43.1 N/mm2 was the ...
Effect of Replacement of Cement by Fly Ash and Silica Fume - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online.
The present study developed a novel High-Performance Concrete by incorporating ultrafine fly ash and silica fume into a conventional concrete mix at various proportions with …
Effect of Partial Replacement of Cement by Mixture of ... i.e. metakaoline, fly ash and silica fume (Mala et al., 2013). ... (1988) stated that the partial replacement of cement by fly ash up to 35 percent in concrete the positive change in strength at later age. Udoeyo et al. (2004) reported that wood ash affected
The aim of this research work is to investigate the optimum replacement of cement by silica fume and fly ash and to calculate the compressive strength of concrete. The cement has been replaced by fly ash and Silica fume varying in different percentage like 0%, 10%, 20%, 30%, 40% and 50% by weight of cement.
Tlie highest strength was obtained for the high-volume fly ash concrete followed by the control portland cement concrete, slag concrete, silica fume concrete, and concrete incorporating a ...
High-performance concrete of grades M-25 the replacement levels of cement by silica fume and fly ash are selected as 0%, 6%, 8%, 10%, 12% & 14% for standard sizes cubes for testing. VI. …
Pollack Periodica, 2021. Cement replacement materials are commonly used in concrete technology. Several researchers have examined high-performance concrete after adding mineral admixtures to it, but further studies are still needed to provide the optimum dosage of these materials for instance fly ash and silica fume.
The CAC replacement ratio has the lowest range value of 215–237 mm, showing a minor influence on the flowability of fresh mixes. ... Evaluation of the effect of silica fume on amorphous fly ash geopolymers exposed to elevated temperature. ... Microstructure development in mixes of calcium aluminate cement with silica fume or fly ash. J. Therm ...
7.0 Conclusions • Cement replacement up to 10% with silica fume leads to increase in compressive strength. • The maximum replacement level of silica fume is 10% for M30 grade of concrete. • Due to use of the micro silica in a OPC concrete the life of that concrete is increase 4-5 times than the OPC concrete.
silica fume in replacement. After optimizing the percentage of silica fume, the silica fume is then blended with fly ash, keeping the percentage of cement fixed. The optimum percentage of …
Silica fume is one of the construction materials, even though possess numerous advantages when used in concrete mixtures. Also it has disadvantages that are mentioned by numerous researchers [[33], [34], [35]].The existence of extremely sensitive amorphous silica in SF significantly affects the strength because of its reaction with CH to produce calcium silicate …
Use of high quantities of fly ash might influence early strength of concrete. Addition of 10 percent silica fume improves early strength of the fly ash concrete. Self-compacting high …
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effects of Silica Fume and Fly Ash on the properties of concrete. Water-binder ratio was kept 0.42 for all cases and the specimens were tested at ages of 7, 14 and 28 days.10% Silica
Effects of Silica Fume and Fly Ash as Partial Replacement of Cement on Water Permeability and Strength of High Performance Concrete December 2013 Conference: …
Silica Fume in Concrete - Download as a PDF or view online for free ... METALS THAT PRODUCE SILICA FUME. SILICA FUME HEALTH ISSUES. PHYSICAL PROPERTIES. SILICA FUME IN CONCRETE & ITS EFFECT. SILICA ... CORROSION PROTECTION BY SILICA FUME IN CONCRETE 3-7% silica fume added by mass of cement. Mixture may …
The experiments were based upon a series of reinforced and non-reinforced concrete specimens that contained 1) 20, 35 and 50 percent cement replacement by fly ash, 2) 6, 15 and 27 percent cement replacement by silica fume, and 3) control specimens (no pozzolanic admixture). All specimens had a target w/cm ratio of 0.37.
The use of supplementary cementitious materials (such as fly ash, ground granulated blast furnace slag, silica fume etc.) as a partial replacement for cement in concrete and altering the hydration kinematics to maximize the production of calcium-silicate-hydrate (C-S-H) through the incorporation of nanomaterials like nano silica are very ...
This paper presents results of an experimental study performed to investigate effect of incorporating silica fume on physico-mechanical properties and durability of resulting fly ash geopolymers. Geopolymer specimens were prepared by activating fly ash incorporated with additional silica fume in the range of 2.5% to 5%, with a mixture of sodium hydroxide and …
