Silica fume, also known as condensed silica fume or microsilica, is a spherical sub-micron amorphous silicon dioxide used in many applications.
Silica fume is a co-product of silicon or ferrosilicon production, consisting of ultrafine (sub-micron), amorphous, non-porous, perfectly spherical silicon dioxide (SiO2) particles, with purity levels of 85 to 99 %.
The main effect of these ultra-fine particles is to greatly improve particle packing and produce a highly pozzolanic reaction in concrete and other cementitious bond systems where the silicon dioxide reacts with calcium hydroxide, heightening performance levels and the strength and durability of these materials.
Additionally, silica fume, because of its amorphous (non-crystalline) structure and its specific area, provides other useful features to various applications, including improved sintering capabilities and enhanced high temperature performance of refractory castables, resulting in reactions between microsilica and other components of the refractory mix.
To summarize, silica fume has two key features which alone or in combination are the basis for its high performance:
The nano-sized spherical non-porous particles create an efficient "filler effect"
Primary particles have an average diameter of about 0.15 �¼m (150 nanometers)
Microsilica is a highly reactive form of silica producing a "chemical effect"
Thanks to its amorphous nature and high specific surface area.
Features Of Micro Silica (Silica Fume) Micro Silica also known as Silica fume. It is a by product of producing silicon metal or ferrosilicon alloys in smelter using electric arc furnaces. It is a grey coloured powder, pozzolanic in nature. Applications Concrete Industry Refractory Rubber Industry Anti caking agent Pellet Binder
Microsilica (silica fume) is a by-product of silicon metal or ferrosilicon industries, is an amorphous silicon dioxide SiO2. This product reacts chemically with the calcium hydroxide in the cement paste which yields a calcium silicate hydrate gel that significantly enhances strength and durability. The super fine microsilica fills the voids between cement particles creating a very dense, less permeable concrete. Physical characteristics: Color: gray or gray white powder Bulk density: 320-700 kg/m3 Chemical composition: Items SiO2 Al2O3 Fe2O3 MgO CaO Na2O Moisture Content 75-98% 1.0-0.2% 0.9-0.3% 0.7-0.1% 0.3-0.1% 1.3-0.2% Fineness: the fineness of the silica fume is less than 1 1/4m, and the average particle size is 0.1 0.3 1/4m, and the specific surface area is 20 - 28 m2/g. The fineness and specific surface area are about 80-100 times of cement and 50-70 times of fly ash. Maxtech Micro Silica supplies will be as per QCS 2014 (ASTM C1240): SiO2: >/= 92% LOI:
Micro Silica Sand: Micro silica also known as fume, is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 mm. The main field of application is as pozzolanic for high performance concrete because of its extreme fineness and high silica. Applications : Silica is added to Portland cement concrete to improve its properties, in particular its compressive strength, bond strength, and abrasion resistance. These improvements stem from both the mechanical improvements resulting from addition of a very fine powder to the cement paste mix as well as from the pozzolanic reactions between the silica fume and free calcium hydroxide in the paste. Advantages : Addition of silica also reduces the permeability of concrete to chloride ions, which protects the reinforcing steel of concrete from corrosion, especially in chloride-rich environments such as coastal regions and those of humid continental roadways and runways (because of the use of deicing salts) and saltwater bridges.
Construction
Constructure
Silica is mainly used as a carrier of agricultural chemicals. Finely crushed silica powder is coated with agricultural chemicals and sold on the market for agricultural use. Silica itself has no effects; it merely serves as a carrier, and so can be dispersed without affecting the farmland, which makes it advantageous as a core material. It's used as Fire-resistant product powder, Agricultural chemical carrier, Agricultural chemical carrier, Construction board
We are supplier and exporter of Silica Sand. Silica Sand * Silica Sand is a type of sand usually available in the form of quartz. It is a hard and crystalline form of mineral components. * Silica sand is the most abundant mineral with the purity more than 99.0%. It is the preferred choice of consumption for various industrial purposes.
We deals in the following Chemicals :- Quartz / Silica Powder, Quartz / Silica Lumps, Quartz / Silica Granules, Quartz / Silica Grits Bentonite Powder, Bentonite Lumps, Bentonite Granules, Bentonite Clay Mica Powder, Mica Flakes, Mica Blocks, Mica Sheets, Mica Scraps Dolomite Powder Barite Powder, Barite Ore Hematite / Iron Oxide Powder, Iron Oxide ( Ferric Oxide ) Ilmenite (Synthetic Rutile) Fly Ash Powder Alumina Silica ( Cenosphere ) Powder Calcium Carbonate Powder Magnetite, Cellulose Fibers, Cellophane Flakes, Walnut Shells
As a general rule, The purer the sand, the clearer the products Silicon and oxygen are the earth's two most abundant elements and together they make silica, one of the earths three most common rock forming minerals. Akshar Minerals Silica sand is high purity natural crystalline silica. It is inherently bright, white, low in moisture and chemically inert in nature. Basically, It is made up of two main element Silica & Oxygen. Silica sand is made up of Silicon Dioxide. There are number of different uses of silica sand in the industrial and commercial sector, from golf courses to glass making . The chemical formula of Silica Sand is SiO2 Characteristics : High Purity Weather Resistant White Appearance Naturally Hard Controlled Particle size Chemically Inert Applications Akshar Minerals Silica sand is used depends on physical, chemical and mechanical characteristics such as grain size, shape color, structure and distribution as well as refractoriness strength and stability. There characteristics can differ depending on how mineral is processed after it is mined. This product gets easily mixed and can be used for high temperature applications like flat glass, furnace tubes and many more due to its excellent thermal expansion, hardness. It yields improved durability and burnish resistance. We make for all type of application in the industries like Glass industries, Sodium Silicate Industry, Golf course & Sport Ground, Adhesive and sealant, Rubber industry, Texture Wall Paint, Sand Blasting, Agro pesticide, Cosmetic industry, Soap & Detergent, Filtration Media, Power Plant & Petroleum, Construction Chemical Industry, Plastic, Fertilizer, Paint, Ceramic, Insulation, Foundry, Ramming Mass, Steel Industry, Landscaping, GRC & GRP Industry, Oil & Petroleum Industry, Oil Exploration & Oil Drilling.
