Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
Read More
Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
Read More
By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
Read More
Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
Read More
Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
Read More
The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
Read More
Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
Read More
In the reported study, fly ash, silica fume, or a highly reactive finely pulverized fly ash replaced part of the cement. The concrete mixtures were designed for a constant workability of 75 ...
Details
Data indicate that silica fume accelerates cement hydration at high water/cementitious ratios and retards hydration at low water/cementitious ratios. On the other hand, fly ash retards cement ...
Details
Supplementary cementitious materials (SCMs) and chemical additives (CA) are incorporated to modify the properties of concrete. In this paper, SCMs such as fly ash (FA), ground granulated blast furnace slag (GGBS), silica fume (SF), rice husk ash (RHA), sugarcane bagasse ash (SBA), and tire-derived fuel ash (TDFA) admixed …
Details
Silica fume and fly ash are proven to im prove the properties of concrete. Partic ularly, the use of silica. fume results in signif icant increase in compress ive strength and other properties of ...
Details
Pala et al. (2007) studied the CS of concrete to specify the long-term impacts of silica fume and fly ash. To predict the concrete CS, including silica fume, researchers in Behnood and Golafshani ...
Details
This study evaluates the effects of using 50%, 75%, and recycled aggregate (RA) and 1%, 2%, and 3% polypropylene fiber with a fixed amount of fly ash and silica fume 87 kg/m 3 and 21.75 kg/m 3. The objective is to determine how these combinations affect concrete strength and durability properties (compression, tensile …
Details
In the current study, effect of silica fume on fly ash based geopolymer mortar using recycled aggregates is studied in two series. In the first series, only fine aggregates are replaced by recycled fine aggregates in various percentages and in the second series, along with replacement of M Sand by recycled fine aggregates in …
Details
Pozzolanic elements like silica fume, fly ash, and Metakaolin can be used to partially substitute cement in concrete. ... Investigating the synergistic effects of carbon fiber and silica fume on concrete strength and eco-efficiency. ... Behaviour of M60 grade concrete by partial replacement of cement with fly ash, rice husk ash and silica fume ...
Details
The effect of fly ash and silica fume on mechanical properties and durability of coral aggregate concrete. Author links open overlay panel Wenjuan Wu a b, Ren Wang a, ... Fly ash (FA) as a partial replacement of cement in concrete is commonly added for its pozzolanic activity and low cost. FA concrete shows an improved pore …
Details
This study presents the effect of incorporating metakaolin (MK) on the mechanical and durability properties of high strength concrete for a constant water/binder ratio of 0.3. MK mixtures with cement replacement of 5, 10 and 15 % were designed for target strength and slump of 90 MPa and 100 ± 25 mm. From the results, it was …
Details
regular concrete and concrete containing Fly Ash and Silica Fume is done .It has been seen that when cement is replaced by Fly Ash and Silica Fume compressive strength increases up to certain percentage (10% replacement of cement by Fly Ash and Silica Fume).But higher replacement of cement by Fly Ash and Silica Fume gives lower …
Details
The results indicated that, regardless of the type of the fly ash used, the percentage of fly ash, and the water-cementitious ratio (w/cm) of the concrete, none of the trace metals analyzed (As ...
Details
This document discusses using fly ash and silica fume as partial replacements for cement in concrete. It outlines the objectives to study their effects on compressive strength and find optimal replacement percentages. The methodology describes casting specimens with 0%, 30%, and 40% fly ash replacement and 15%, …
Details
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. MATERIALS USED. Ordinary Portland cement is used in the project work, as it is readily available in local market.
Details
Cement replacement with 10% Fly ash, 5% Metakaolin & 0.2% Recron 3s fiber enhanced the mechanical properties. a b s t r a c t In this study, an experimental study was carried to investigate the ...
Details
Fly ash and silica fume are used to partially replace cement in concrete mixes. Experimental testing was conducted on concrete mixes with various replacement levels of fly ash and silica fume. The compressive strength and split tensile strength of the mixes were tested at 7 and 28 days. The results showed that the mix with 10% fly ash …
Details
Experimental testing was conducted on concrete mixes with various replacement levels of fly ash and silica fume. The compressive strength and split tensile strength of the mixes were tested at 7 and 28 days. The results showed that the mix with 10% fly ash and 10% silica fume replacement achieved the highest strengths, while …
Details
However, all LC³ concretes presented higher carbonation fronts compared to the reference Portland cement concrete due to the low availability of calcium to react with CO 2 that penetrates through concrete pores. Among the SCMs, silica fume, fly ash and sugarcane bagasse ash presented a suitable performance to use in LC³ mixture.
Details
This work investigated the effects of the replacement of Portland cement (PC) with (25, 30, 35 and 40%) fly ash (FA) and (5, 10, 15, and 20%) silica fume (SF) by weight as binary and ternary ...
Details
Materials Science, Engineering. Journal of Wuhan University of Technology-Mater…. 2014. The effect of fly ash and silica fume on hydration rate and strength of cement in the early stage was studied. Contrast test was applied to the complex cementitious system to investigate the…. Expand.
Details
The cement industry is the primary source of environmental pollution as it intakes a huge amount of energy in the production and releases a lot of CO2, which contributes to global warming. To reduce the use of cement for energy consumption, the use of supplementary cementitious materials (SCMs) like Fly ash (FA) and Silica fume …
Details
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 …
Details
This document discusses using fly ash and silica fume as partial replacements for cement in concrete. It outlines the objectives to study their effects on compressive strength and find optimal replacement percentages. The methodology describes casting specimens with 0%, 30%, and 40% fly ash replacement and 15%, …
Details
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
Details
Utilizing silica fume as a substitute for cement in pervious concrete offers a viable approach to achieve sustainability within the realm of construction industry. The mechanical characteristics of pervious concrete are influenced by several factors, such as quantity of silica fume utilized as a replacement for cement, the cement content, …
Details
As a result, an experiment was initiated to develop low alkaline VPC using fly ash (FA) and silica fume (SF) [18]. The concrete mixture's cement component was substituted with FA and SF in amounts ranging from 15 to 30% and 6–12%, respectively.
Details
Silica fume enhanced the mechanical properties of PP-filled mortar, but had an adverse effect on its shrinkage properties. • Fly ash inhibited the development of PP-filled mortar shrinkage, but decreased its early strength. • The optimal combination contents of Silica fume and Fly ash in PP-filled mortar were 7% and 15%.
Details
Fly ash, ground granulated blast-furnace slag, silica fume, and natural pozzolans, such as calcined shale, calcined clay or metakaolin, are materials that, when used in conjunc-tion with portland or blended cement, contribute to the properties of the hardened concrete through hydraulic or pozzolanic activity or both (Fig. 3-1).
Details
DOI: 10.1016/J.CSCM.2021.E00630 Corpus ID: 237667350; Recycled waste glass powder as a partial replacement of cement in concrete containing silica fume and fly ash @article{Ibrahim2021RecycledWG, title={Recycled waste glass powder as a partial replacement of cement in concrete containing silica fume and fly ash}, author={K. I. …
Details
Fly ash is a byproduct of coal combustion in power plants that reduces the heat of hydration in concrete. Blast furnace slag is prepared through metallurgical processes and reacts with cement. Silica fume is produced from silicon metal production and increases concrete strength and durability. Rice husk ash comes in black or white …
Details
In practice, coal fly ash, slag, and silica fume are commonly used SCMs in concrete and these materials positively contribute to the concrete strength and durability at later ages via pozzolanic ...
Details
Concrete is one of the most versatile construction materials as it can be designed to withstand the harshest environmental conditions. This causes major problems for the environment due to CO2 emission from the manufacturing of Portland cement. Also, the fast growth in various industries has resulted in tons of by-product or waste …
Details
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.
Details
Most microsilica particles are less than 1 micron (0.00004 inch) in diameter, generally 50 to 100 times finer than average cement or fly ash particles. Frequently called condensed silica fume, microsilica …
Details
Sofol is a well-known crusher and grinding mill manufacturer that offers equipment and solutions for customers from aggregates, mining and mineral grinding industry.
You can leave your message here, we'll send you an Email immediately.
Online ChatCopyright ©2000- 2024 Shanghai Sofol CompanySitemap
PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
GET QUOTE