Astrra Chemicals
Astrra Chemicals
Thousand Lights, Chennai, Tamil Nadu
GST No. 33AAAFA7706K1ZN
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Silica Fume

We are a leading Manufacturer of silica fume grey, white microsilica silica fume, silica fume ( microsilica ) ( grey ) for refractory cast and undensified silica fume from Chennai, India.

Silica Fume Grey

Silica Fume Grey
  • Silica Fume Grey
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Approx. Price: Rs 16 / KgGet Latest Price

Product Details:

Minimum Order Quantity50 Kg
GradeUndensified
MaterialGrey Microsilica
Packaging Size25 Kgs
ColorGray
StatePowdered
Packaging TypeHDPE Bag
Usage/ApplicationIndustrial
BrandAstrra Chemicals
Country of OriginMade in India
FormulaSiO2

Microsilica ( Grey ) is a mineral admixture composed of very fine solid glassy spheres of silicon d i oxide (SiO2). Each particles are less than 1 micron in diameter, generally 50 to 100 times finer than average cement or fly ash particles. Frequently called condensed silica fume, microsilica is a by- product of the industrial manufacture of ferro silicon and metallic silicon in high-temperature electric arc furnaces. The ferrosilicon or silicon product is draw n off as a liquid from the bottom of the furnace. Vaporizing from the 2000-degree-C furnace bed is oxidized, and as it cools condenses into particles which are trapped in huge cloth bags. Processing the condensed fume to remove impurities and control particle size yields microsilica. It helps in compressive strength, bond strength, and abrasion resistance. Addition of silica fume 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. Silica fume reduces bleeding significantly because the free water is consumed in wetting of the large surface area of the silica fume and hence the free water left in the mix for bleeding also decreases. Silica fume also blocks the pores in the fresh concrete so water within the concrete is not allowed to come to the surface.

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White Microsilica Silica Fume

White Microsilica Silica Fume
  • White Microsilica Silica Fume
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Approx. Price: Rs 23 / KgGet Latest Price

Product Details:

Minimum Order Quantity100 Kg
ColorWhite
GradeConcrete Grade
Packaging Size50 Kgs
StatePowdered
Density0.76 gm/cc
Boiling Point2.623 Deg C
Usage/ApplicationIndustrial
BrandAstrra Chemicals

We are leading manufacturers, exporters and suppliers of the best quality Microsilica ( Silica Fume Densified ) in Ambattur, Chennai, Tamilnadu, India. It is a construction chemical, which is also known as silica fume. Commonly it is used mineral admixture in high strength concrete. If it gets mixed with the concrete, it enhances the strength and workability. It is commonly used in the construction of bridges and nuclear plants.

Features:

Longer shelf life

Accurate composition

Optimum binding strength

Purity

Accurate composition

Longer shelf life

Aggregate Concrete

Concrete Admixture

Cement admixture

Ultra High Strength Concrete

CERTIFICATE OF ANALYSIS

 

                      MICROSILICA – (SILICA FUME)

 

PHYSICAL PROPERTIES

RESULTS

PHYSICAL STATE

Micronised Powder

ODOUR

Odourless

APPEARANCE

White Colour Powder

COLOUR

White

PACK DENSITY

0.77 gm/cc

pH of 5% SOLUTION

6.91

SPECIFIC GFRAVITY

2.64

MOISTURE

0.055%

OIL ABSORPTION

54 ml / 100 gms

CHEMICAL PROPERTIES

 

SILICA (SIO2)

99.920%

ALUMINA (Al2O3)

0.031%

FERRIC OXIDE (Fe2O3)

0.012%

TITANIUM OXIDE (TiO2)

0.000%

CALCIUM OXIDE (CaO)

0.000%

MAGNESIUM OXIDE (MgO)

0.000%

POTTASIUM OXIDE (K2O)

0.002%

SODIUM OXIDE (Na2O)

0.004%

LOSS ON IGNITION

0.001%

HEAVY METALS:

LEAD (Pb)

ARSENIC (As)

 

0.000%

0.000%

 

 

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Additional Information:

  • Production Capacity: 1000 tonnes
  • Delivery Time: 7 days
  • Packaging Details: Brand New HDPE Bags
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Silica Fume ( Microsilica ) ( Grey ) For Refractory Cast

Silica Fume ( Microsilica ) ( Grey ) For Refractory Cast
  • Silica Fume ( Microsilica ) ( Grey ) For Refractory Cast
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Approx. Price: Rs 16 / KgGet Latest Price

Product Details:

GradeUndensified Silica Fume ( Microsilica ) ( Grey ) for Refractory Cast
MaterialGrey Microsilica
Packaging Size25 Kgs
ColorGray
StatePowdered
Purity85 % and above

Silica Fume ( Microsilica ) ( Grey )

We are the leading manufactures, exporters,technical developers and suppliers of Silica Fume ( Microsilica ) ( Grey ) in Chennai, Tamilnadu, India. 

Undensified Silica Fume ( Microsilica ) ( Grey ) for Refractory Cast Fused Cast and Sintered Refractories for Glass furnaces 

The Applications Of Silica Fume ( Microsilica ) ( Grey ) In Refractory Materials

Silica fume is mainly used to improve refractory materials for over forty years. Silica fume using in refractory materials has many features as following:

  • Silica fume can increase the liquidity of pouring type of refractory materials, reduce water consumption and make it easy to shape and improve production efficiency greatly.
  • Because of its ultra-structure of filler, the density of refractory material and strength will increase significantly;
  • Silica fume has high activity, under the premise of existence of Al2O3 ingredients, it is easy to generate the mullite phase to make the high temperature strength and thermal shock resistance increase greatly.
  • Silica fume has strong hydrophilic. Adding water, it can make stronger cohesion in refractory material in order to improve the performance of high temperature resistance of refractory and prolong the service life of refractory products.

Refractory material usually uses unencrypted micro silicon powder. At present, besides in casting refractory material widely using, unencrypted micro silicon is applied extensively in the fused and sintered refractories. Such as low cement castable, developed in the seventy’s, is a new type of high performance refractory castable, which is successfully developed by France first. Therefore, silica fume is widely applied in various industrial high temperature furnace with good technical and economic effect.

Low cement castable and ordinary castable both use calcium aluminate cement. But adding silica fume and high efficiency water reducing agent, it can not only save expensive aluminate cement 50-70% but also improve the cement performance. Silica fume has double applications in the new castable. Because of the size of silica fume is very small, and an important feature of silica fume can reduce the cement content in the refractory casting material.

 

Silica fume is widely used in refractory industry. Refractory raw material can be instead of pure aluminium oxide mud as refractor material; Used as an additive to join in the production of amorphous and shaped refractory products, silica fume can improve strength and increase the high temperature performance. In addition, it is applied in the ladle as a whole as condensation agent. According to the data indicate, the low cement castable with silica fume has been widely applied in coke oven, the sintering, steel-making, steel rolling, nonferrous metallurgy, petroleum as well as chemical, cement, glass ceramics and power generation industry 

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Undensified Silica Fume

Undensified Silica Fume
  • Undensified Silica Fume
  • Undensified Silica Fume
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Approx. Price: Rs 16 / KgGet Latest Price
Product Brochure

Product Details:

Minimum Order Quantity100 Kg
FormPowder
BrandAstrra Chemicals
Usage/ApplicationIndustrial
GradeUn densified
MaterialSilica Fume ( Microsilica )
Packaging TypeHDPE Bag
ColorGrey
Country of OriginMade in India
Packaging Size25 kg/bag

Microsilica (Silica Fume ) ( Grey )

We are the leading manufactures, exporters,technical developers and suppliers of Microsilica (Silica Fume ) ( Grey ) 

Silica Fume Application:

Concrete, Refractory, High Performance Concrete, Oil and Gas Industry, Ceramics, Concrete Roofing, Wall boards, Cementation Repair Products, Concrete Tile & Panels, FCB, Shotcrete, Polymers & Elastomers and (SCC) Self-Compacting Concrete.

ConcreteCompressive strengthCreepFlexural strengthPorositySilica fumeSplitting tensile strengthShrinkageWorkability

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Additional Information:

  • Production Capacity: 50000
  • Delivery Time: Within 7 to 10 days
  • Packaging Details: Brand New 25 Kgs Hdpe Bags
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Sanklesh Chabria (Managing Partner)
Astrra Chemicals
No. 11, Moores Road, Moores Garden
Thousand Lights, Chennai - 600006, Tamil Nadu, India


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