Product Details:
Minimum Order Quantity | 50 Kg |
Grade | Undensified |
Material | Grey Microsilica |
Packaging Size | 25 Kgs |
Color | Gray |
State | Powdered |
Packaging Type | HDPE Bag |
Usage/Application | Industrial |
Brand | Astrra Chemicals |
Country of Origin | Made in India |
Formula | SiO2 |
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.
Product Details:
Minimum Order Quantity | 100 Kg |
Color | White |
Grade | Concrete Grade |
Packaging Size | 50 Kgs |
State | Powdered |
Density | 0.76 gm/cc |
Boiling Point | 2.623 Deg C |
Usage/Application | Industrial |
Brand | Astrra Chemicals |
We are leading manufacturers and exporters of the best quality Microsilica ( Silica Fume Densified ). 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
Additional Information:
Product Details:
Minimum Order Quantity | 100 Kg |
Usage/Application | Construction |
Material | Silica |
Grade | Sand M72 ( Brown ) |
Packaging Size | 25 kg/bag |
Color | Brown |
Packaging Type | HDPE Bag |
Brand | Astrra Chemicals |
We are the leading manufactures, exporters,technical developers and suppliers Silica Sand in Chennai, Tamil Nadu,
SAND M72:
SiO2 | 99. 5% |
Al2O3 | 0. 08% |
TiO2 | 0. 04% |
CaO | 0. 01% |
MgO | 0. 01% |
L.O.I. | 0. 28% |
Alkalies | 0. 29% |
Fe2O3 | 0. 04% |
Additional Information:
Product Details:
Minimum Order Quantity | 100 kg |
State | Powdered |
Packaging Type | Poly Bag |
Packaging Size | 25KG |
Brand | Astrra Chemicals |
Usage/Application | Industrial |
PH Value | 2-6 |
Color | White |
Form | Powder |
Product Details:
Minimum Order Quantity | 50 Kg |
Brand | Astrra Chemicals |
Physical State | Powder |
Packaging Type | HDPE Bag |
Packaging Size | 25-50 kg/bag |
Chemical Formula | CaO |
Active cao | 68% |
Acid insolubles | 1% |
Magnesia as mgo | 0.6% |
Molar mass | 56.0774 g/mol |
Product Details:
Minimum Order Quantity | 5 Kilogram |
Usage/Application | Construction |
Brand | Astrra Chemicals |
Ph Value | 6.00 |
Specific Gravity | 1.10 |
Totoal Solids | 45% |
Appearance | Colorless to Light Lazy Liquid |
Product Details:
Minimum Order Quantity | 5 Kilogram |
Usage/Application | Laboratory |
Form | Liquid |
Packaging Type | Bottle |
Specific Gravity | 1.1 |
Brand | Astrra Chemicals |
Ph | 6-12 |
Totoal Solids | 45.00% |
Product Details:
Minimum Order Quantity | 50 Kilogram |
Brand | Astrra Chemicals |
State | Powdered |
Packaging Type | HDPE Bag |
Bulk Density | 00. 50 gm/cc |
Moisture | 02.00 |
Ph Value | 07.00 @ 10% Sol. |
Oil Absorption | 32 ml / 100 gm |
Retention | 00.50% |
Contents | Min.% | Max% |
Silica | 45. 00 | 47 |
Alumina | 36. 00 | 37. 00 |
Ferric Oxide | - | 1 |
Calcium Oxide | - | 00 50 |
Magnesium Oxide | - | 0.5 |
Titanium Dioxide | - | 00. 50 |
Loss On Ignition | 14. 00 | 15. 00 |
Potassium | - | 00. 50 |
Sodium | - | 00. 50 |
Brightness | 78. 00 | - |
Whiteness | 80. 00 | - |
Acid Solubility | 01. 00 | 02. 00 |
Water Absorption | 36 ml/100gm | 38 ml / 100gm |
Product Details:
Minimum Order Quantity | 1000 Kilogram |
Packaging Size | 25 kg/bag |
Color | White |
Packaging Type | Poly Bag |
State | Powder |
Brand | Astrra Chemicals |
PH Value | 7-12 |
Form | Powder |
Product Details:
Minimum Order Quantity | 50 Kg |
Grade | WHITE |
Material | PURE |
Packaging Size | 50 KGS |
Color | White |
State | Powdered |
Packaging Type | HDPE Bag |
PH Value | 6.90 |
Brand | Astrra Chemicals |
Product Details:
Minimum Order Quantity | 100 Kg |
CAS No | 1305-62-0 |
Packaging | 50 Kg HDPE Bag |
Purity | 90% |
Brand | Astrra Chemicals |
Form | Powder |
Fragrance | Odourless |
Chemical Formula | Ca(OH)2 |
Density | 2.21 g/cm3 |
Melting Point | 580 Deg C |
Molar mass | 74.093 g/mol |
Lime as Ca (OH)2 | : | 90% |
|
Active CaO | : | 68% |
|
Acid insolubles | : | 1 % | Max |
Iron & Alumina as Fe2O3 & Al2O3 | : | Traces |
|
Magnesia as MgO | : | 0.6% | Max |
Additional Information:
Product Details:
Minimum Order Quantity | 100 Kg |
Packaging Size | 50 Kg/Bag |
Color | White |
Packaging Type | HDPE Bag |
Brand | Astrra |
Form | Powder |
Ph Value | 4-7 |
We are leading manufacturers and exporters of the best quality Microsilica ( Silica Fume Densified ). 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.
Product Details:
Minimum Order Quantity | 100 Kg |
Usage/Application | Industrial |
Form | Powder |
Bulk Density | 0.85% |
Brand | Astrra Chemicals |
Calcium Carbonate | 54% |
Magnesium Carbonate | 45% |
Particulars | Results |
Appearance | Very White Smooth Powder |
Sio2 | 2% Max. |
Passing On 500 Mesh | 1% Max. |
Water Solubles | 0. 80% |
Heavy Metals | Traces |
Product Details:
Minimum Order Quantity | 100 Kg |
Usage/Application | Industrial |
Packaging Type | HDPE Bag |
State | Powdered |
Color | White,Grey |
Form | Powder |
Brand | Astrra Chemicals |
Packaging Size | 25 kg/bag |
Product Details:
Minimum Order Quantity | 100 Kg |
Brand | Astrra Chemicals |
Formula | Fe2O3 |
Iron Content | 98% |
Moisture | 1% |
Oil Absorpaiton | 20 - 22% |
Volatile Matter | 0.8% At 100 + 5 Deg C |
Ph Value | 3.5 - 4 |
Product Details:
Color | White |
State | Powdered |
Boiling Point | 2623 Deg C |
PH Value | 5-12 |
Usage/Application | Industrial |
Brand | Astrra Chemicals |
We offer a wide range of Silica Flour,which is processed using best grade natural silica, sourced in from reliable market vendors. We offer good quality silica flour to our clients which are processed using premium grade natural silica, sourced in from reliable market vendors. These are available at cost effective price.
Features:
Certificate of analysis:
SiO2 | 99. 5% |
Al2O3 | 0. 08% |
TiO2 | 0. 04% |
CaO | 0. 01% |
MgO | 0. 01% |
L.O.I. | 0. 28% |
Alkalies | 0. 29% |
Fe2O3 | 0. 04% |
MESH | 200 |
Product Details:
Packaging Type | Packet |
State | Powdered |
Color | White |
Form | Powder |
It is used in various industries.
Product Details:
Type | Powder |
State | Powdered |
Color | White |
Form | Granules |
Product Details:
Minimum Order Quantity | 50 Kg |
Brand | Astrra Chemicals |
Chemical Formula | CaCl2 |
Physical State/Form | Powder |
Packaging Size | 50 |
Packaging Type | HDPE Bag |
Physical Form | Powder |
Product Details:
Minimum Order Quantity | 50 Kilogram |
Usage/Application | Construction |
Material | Silica |
Grade | Foundry |
Packaging Size | 25 kg/bag |
Color | Brown |
Packaging Type | HDPE Bag |
Brand | Astrra Chemicals |
Foundry Sand
We are the leading manufactures, exporters,technical developers and suppliers Foundry Sand in Chennai, Tamil Nadu,
Concrete is a mixture comprised of cement (10-15 percent). Foundry sand can be used as a fine aggregate substitute in concrete. Fine aggregates are generally 3/8 inch or smaller, in diameter. Foundry sand meets two of the critical requirements for concrete aggregates: it is uniformly graded, and is strong, hard, and durable.
Additional Information:
Product Details:
Minimum Order Quantity | 10 Kg |
CAS No | 1310-73-2 |
Type | Powder |
Brand | Astrra Chemicals |
Grade Standard | Industrial Grade |
Chemical Formula | NaOH |
Density | 2.13 g/cm3 |
Molar mass | 39.997 g/mol |
Product Details:
Minimum Order Quantity | 5 Kg |
Material | Silica |
State | Powdered |
Packaging Type | HDPE Bags |
Packaging Size | 25 kg/bag |
Grade | Nano |
Carbon Content | 0.15% |
Chloride Content | 0.0202% |
Test Item | Standard Requirements | Test Results |
Specific Surface Area ( M2/g) | 200 + 20 | 202 |
Ph Value | 3.7 – 4.5 | 4. 12 |
Loss On Drying @ 105 Deg.c (5) | < 1. 5 | 0. 47 |
Loss On Ignition @ 1000 Deg.c (%) | < 2.0 | 0.66 |
Sieve Residue (5) | < 0. 04 | 0. 02 |
Tamped Density G/l | 40 – 60 | 44 |
Sio2 Content ( % ) | > 99. 8 | 99. 88 |
Al2O3 | < 0. 03 | 0. 005 |
TiO2 | < 0. 02 | 0. 004 |
Fe2O3 | < 0. 003 | 0. 001 |
Additional Information:
Product Details:
Minimum Order Quantity | 100 Kg |
Brand | Astrra Chemicals |
Brightness | 82+/-0.5% |
Loss on ignition | 14% (Max) |
Ph | 4.5 to 6.5 (of 20% aqueous solution) |
Particles | 68% w/w (Min) |
Bulk density | 0.8%+-0.1 gm/cc |
We are the leading manufactures, exporters,technical developers and suppliers of Calcined Kaolin in Chennai, Tamil Nadu,
CHEMICAL ANALYSIS (w/w)%:
Silica | 45.17 |
Ferric Oxide | 0.50(Max) |
Alumina | 37.59 |
Titanium Dioxide | 0.50 |
Calcium Oxide | 0.22 |
Magnesium Oxide | 0.12 |
Sodium Oxide | 0.31 |
Potash | 0.07 |
Product Details:
Minimum Order Quantity | 50 Kg |
Form | Powder |
Usage/Application | Industrial |
Color | Black |
Packaging Type | HDPE Bag |
Packaging Size | 25-50 kg/bag |
Ph Value | 10-12 |
Product Details:
Minimum Order Quantity | 50 Kilogram |
Brand | Astrra Chemicals |
Usage/Application | Construction |
Chemical Formula | Na2SiO3 |
Density | 2.4 g/cm3 |
Melting Point | 1,088 Deg C |
Molar mass | 122.06 g/mol |
Total alkalinity (as Na2O ) % by mass, min | 21 |
Ratio of total alkalinity (as Na2O) to total soluble silica (as SiO2) : (Na2O ) : SiO2) | 1:1 ± 0. 05 |
Loss on evaporation % by mass, max | 59 |
Matter insoluble in water % by mass, max | 0.5 |
Free alkalinity (as Na2O ) % by mass, max | 0.8 |
Product Details:
Minimum Order Quantity | 10 Kilogram |
Brand | Astrra Chemicals |
Packaging Type | Can, Bottle |
Physical Form | Liquid |
Chemical Formula | Ca(OH)2 |
Specific Gravity | 40 +/- 1 Deg. Be |
Usage | Industrial |
Concrete treated with a sodium silicate solution helps to significantly reduce porosity in most masonry products such as concrete, stucco, and plasters. A chemical reaction occurs with the excess Ca(OH)2 (portlandite) present in the concrete that permanently binds the silicates with the surface, making them far more durable and water repellent. This treatment generally is applied only after the initial cure has taken place (7 days or so depending on conditions). These coatings are known as silicate mineral paint.
Certificate of Analysis:
Technical Speciication | Neutral Grade | Alkaline Grade |
Appearance | Hazy Colourless | Viscous Translucent |
Total Alkalnity ( As Na2o) % By Mass, Min | 9. 00 +/- 1. 00 | 15. 00 +/- 1. 00 |
Soluble Silicate As Sio2 | 29 | 33 |
Toal Soluble Slicate % By Mass, Min | 38. 00 +/- 1 | 48 |
Ratio Of Total Alkalinity ( As (Na2o ) To Total Soluble Silica (As Sio2: ( Na2o: Sio2 ) | 01:30.20 | 01:02.20 |
Product Details:
Minimum Order Quantity | 100 Kilogram |
Form | Liquid |
Packaging Size | 50 / 200 KGS |
Grade Standard | Technical Grade |
Brand | Astrra Chemicals |
Usage | Industrial |
Physical State | Liquid |
Packaging Type | Can,Bottle |
Chemical Formula | Na2SiO3 |
SODIUM SILICATE LIQUID
We are the leading manufactures, exporters,technical developers and suppliers of SODIUM SILICATE LIQUID in Chennai, Tamil Nadu,
Sodium silicates are used in industry as adhesives, detergents, ingredients in cleaning compounds, cements, binders, and unique coatings, as well as coagulant aids, anticorrosives, catalyst bases, deflocculants, chemicals, zeolites
Additional Information:
Product Details:
Brand | Astrra |
Grade | Fire Retardin |
Usage/Application | Fire Retardin |
Packaging Type | HDPE BAG |
Packaging Size | 50KG |
Physical Form | Powder |
Product Details:
Brand | Astraa |
Physical State/Form | Flakes |
Usage/Application | Construction |
Product Details:
Minimum Order Quantity | 100 Kg |
Usage/Application | Printing & Paint |
Grade | NV/200 XL 5M |
Material | Fumed SIlica |
Color | White |
State | Powdered |
Packaging Type | HDPE Bag |
Brand | Astrra Chemicals |
Packaging Size | 10 kgs/bag |
Additional Information:
Product Details:
Minimum Order Quantity | 100 Kg |
Service Type | Farm Nursery |
Packaging Size | 10 Kgs |
Maintenance Type | Gardens |
Packaging Type | Packet |
Property Location | Chennai |
Usage/Application | Horticulture / Landscaping |
Color | Golden Brown |
Brand | Astrra Chemicals |
Moisture Content | 1 - 1.5% |
Apparent Weight | 0.15 - 0.18 g/cc |
Ph | 7 to 9 |
Chemical Analysis | Result |
SiO2 | 35 – 41% |
Al2O3 | 6 – 9. 5% |
F32O3 | 6 – 9. 5% |
MgO | 21. 5 – 25. 5% |
CaO | 2. 6% |
K2O | 3 – 6% |
TiO2 | 0. 6 – 1. 4% |
P2O3 | 0. 2 – 2 |
Additional Information:
Product Details:
Minimum Order Quantity | 5 Kg |
Grade | Nano |
Usage/Application | Paints,Coating,Construction,Concrete,Printing Inks,Food |
Color | Transparent |
Service Location | Chennai |
Brand | Astrra Chemicals |
ph value | 3.7 - 4.5 |
Tamped density | 40 - 60 g/l |
specific gravity | 2.2 - 2.4 |
We are the leading manufactures, technical suppliers of Nano Silica in Chennai, Tamil Nadu,
Nano silica in the construction industry, extensive research is going on to improve the performance of various building materials and development of durable and sustainable concrete. Among all the nano-materials, nano-silica is the most widely used material in the cement and concrete to improve the performance because of its pozzolanic reactivity besides the pore-filling effect. concrete strength is influenced by lots of factors like concrete ingredients, age, ratio of water to cement materials, etc. Nano-silica incorporation into concrete resulted in higher compressive strength than that of normal concrete to a considerable level. for nano-silica blended concretes up to maximum limit of 2% with average particle size of 15 and 80 nm. Same results were obtained for split tensile and flexural strength.
Certificate Of Analysis:
Test Item | Standard Requirements | Test Results |
Specific Surface Area ( M2/g) | 200 + 20 | 202 |
Ph Value | 3.7 – 4.5 | 4. 12 |
Loss On Drying @ 105 Deg.c (5) | < 1. 5 | 0. 47 |
Loss On Ignition @ 1000 Deg.c (%) | < 2.0 | 0.66 |
Sieve Residue (5) | < 0. 04 | 0. 02 |
Tamped Density G/l | 40 – 60 | 44 |
Sio2 Content ( % ) | > 99. 8 | 99. 88 |
Al2O3 | < 0. 03 | 0. 005 |
TiO2 | < 0. 02 | 0. 004 |
Fe2O3 | < 0. 003 | 0. 001 |
Additional Information:
Product Details:
Minimum Order Quantity | 5 Kilogram |
Usage/Application | Industrial |
Packaging Size | 5-10 Liter |
Brand | Astrra Chemicals |
Packaging Type | Can |
Form Type | Liquid |
Form | Liquid |
Product Details:
Minimum Order Quantity | 5 kg |
Usage/Application | Industrial |
Packaging Size | 5-10 Liter |
Packaging Type | Can |
Form Type | Powder |
Brand | Astrra Chemicals |
Color | White |
Product Details:
Minimum Order Quantity | 50 Kilogram |
Brand | Astrra Chemicals |
Application | Industrial |
Grade | MIO |
Packaging Type | HDPE Bag |
Packaging Size | 25-50 kg/bag |
Physical Form | Fe2o3 |
Chemical name | Hematite |
Chemical formula | fe2o3 |
Color | Grey to reddish brown |
Seive analysis | Result (% retained) |
150 mesh bss (100 microns) | traces |
240 mesh bss (63 microns) | 05% - 15% |
Product Details:
Minimum Order Quantity | 100 Kilogram |
Brand | Astrra Chemicals |
Chemical Formula | CaCl2 |
Physical Form | Powder |
Usage/Application | Industrial |
Packaging Type | Poly Bag |
Density | 2.15 g/cm3 |
Melting Point | 772 Deg C |
Product Details:
Minimum Order Quantity | 5 Kg |
Usage/Application | Industrial |
Form | Liquid |
Packaging Type | Can, Bottle |
Specific Gravity | 1.10 |
Brand | Astrra Chemicals |
PH | 6. 00 |
Totoal Solids | 45% |
Product Details:
Minimum Order Quantity | 10 Kilogram |
Brand | Astrra Chemicals |
Usage/Application | costruction |
Packaging Size | 100-1000 ml |
Type | Bonding |
Color | Pale Yellow |
Physical State | Liquid |
Shelf Life | 1 year |
Packaging Type | Bottle |
Additional Information:
Product Details:
Form | Liquid |
Usage/Application | Industrial |
Color | Transparent |
Packaging Size | Bottle |
Packaging Type | Plastic bottle |
Brand | Astraa |
Product Details:
Color | White |
Brand | Astraa |
Form | Powder |
Usage/Application | Multipurpose |