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.
Micro Silica
Silica Fume (Micro Silica) is mainly used as cement admixture or concrete binder to improve the performance of cement or concrete with higher strength abrasion resistance, erosion resistance, corrosion resistance and permeability resistance
Micro Silica 30-80 MESH & 150-200 PPM IRON
Micro Silica
Sio2 85% min H2O 2% max LOI 3% max Specific surface Area(B.E.T) : 15,000-22,000sqm/kg Pozz. Activity :110% min Bulk density : 550-700kgs/m3 The high Pozz. activity is easy reactive with cement . when added to cement will greatly improve cement performance. globalsources.com/everwintiles.co Packing : 900-1000kgs/jumboo bag
Product Specification Quality Assurance Product/Description: Microsilica Sl No. Parameters Company Standard 01 Silicon dioxide (SiO2) 88-92% 02 Specific gravity 2.3 - 2.5 03 Fineness passing 45 micron 96-99% 04 Ferric oxide (Fe2O3) 0.10 - 0.20% 05 Carbon (C) 02 -03% 06 Loss on ignition (LOI) 02 -03% 07 Pozzolanic activity 110 - 120% 08 Bulk Density (Lb/ft3) 35 -40 09 Moisture at 1050C 0.3- 0.8% 10 Appearance Grey Powder
The SiO n the micro-silica is an amorphous material so that micro-silica is a small particle with high activity, large specific surface area, and favorable physical and chemical property.
We are exporter of Micro Silica from Turkey . Offering micro silica with 94% - 96% purity. Ideal for various industrial applications. Contact us for details and pricing.
