• Fly Ash Download

    What is Fly Ash

    Fly Ash is a by product of coal based thermal power station generated by the combustion of pulverisedcoal. Fly Ash is a fine, grey, amorphous powder. It is rich in silica & alumina and spherical in shape. The properties of Fly Ash may vary widely, both physically and chemically, depending upon the nature of coal, the efficiency of coal combustion process and the selection process. Therefore, it is important that when considering the use of Fly Ash to look no further than a company with the in depth technical knowledge and support to manufacture and supply a high quality product, that company is Ashtech (India) Pvt. Ltd.


    Our Technology means even better quality

    Ashtech only selects Fly Ash that is highly reactive and has water reducing characteristics. Our Fly Ash is among the first classified and processed material being made available in India.By classifying and processing, we ensure that a large proportion of our Fly Ash is composed of fine particles, which results in a more controlled and consistent product. Our Fly Ash complies with the stringent International codes of practice such as the BS 3892 Part 1,ASTM C 618, BF EN 450 and IS 3812 Grade I. Our customers can therefore be assured of the highest standards of quality, process control and product consistency.


    Characteristics of fly Ash Advantages of fly Ash
    Fine Particle size Better Workability
    Spherical Particle Shape Reduced Permeability
    Low Carbon Content Reduced Heat of Hydration
    Pozzolanic Reaction Improved Pumpability
      Improved Sulphate and Chloride Resistance
      Reduced Risk of Alkali Aggregate Reaction
      Increased Long Term Strength
      Better Concrete Finish
      Reduced Bleeding and Segregation
      Reduced Shrinkage






    We at ASHTECH take special care in understanding the client's needs. Customers have come to count on our expertise and our willingness to work in total co-operation towards maximum & optimum benefit from usage of Fly Ash and allied products.


    Ashtech Super Pozz and Duracrete Comparison table with Provision for Fly Ash


    Sr No. Charachteristics BS EN 450 ASTM C-618 CLASS F IS 3812 Grade 1 Ashtech FlyAsh SUPERPOZZ Ashtech FlyAsh DURACRETE
    1. Silicon Dioxide(SiO2) Plus Nil Nil 70.00 95.89 92.83
    2. Aluminium Oxide(Al2O3) plus IronOxide (Fe2O3) Min% 70.00 4.0 35.00 62.57 0.53
    3. Silicon Dioxide(Sio2) by % mass Min Nil 2.50 5.00 0.38 0.32
    4. Maganesium Oxide(MgO) Max% Nil 0.50 2.75 0.25 Nil
    5. Sulphur Trioxide(SO3), Max% 5.00 7.00 Nil Nil 1.81
    6. Moisture Content Max % 3.00 Nil 6.00 1.00 0.78
    7. Available Alkalies as Sodium Oxide (Na2O), Max% 6.00 12 1.50 0.75 <34
    8. Fineness % retained on 45 Micron n wet-sieving , Max % 12 12 34 <10 <25