Fly Ash Bricks

Product Code N.A
Quality and Standards IS 12894:1990
Uploaded on May 2007


Fly Ash bricks are made of fly ash, lime, gypsum and sand. These can be extensively used in all building constructional activities similar to that of common burnt clay bricks. The fly ash bricks are comparatively lighter in weight and stronger than common clay bricks. Since fly ash is being accumulated as waste material in large quantity near thermal power plants and creating serious environmental pollution problems, its utilisation as main raw material in the manufacture of bricks will not only create ample opportunities for its proper and useful disposal but also help in environmental pollution control to a greater extent in the surrounding areas of power plants. In view of superior quality and eco-friendly nature, and government support the demand for Fly Ash Bricks has picked up.

Market Potential

The country consumes about 180 billion tonnes bricks, exhausting approximately 340 billion tonnes of clay every year and about 5000 acres of top soil land is made unfertile for a long period. The Government is seriously concerned over soil erosion for production of massive quantities of bricks, in the background of enormous housing needs.

The excellent engineering property and durability of fly ash brick enlarges its scope for application in building construction and development of infrastructure, construction of pavements, dams, tanks, under water works, canal lining and irrigation work etc. Enormous quantities of fly ash is available in and around thermal power stations in all the states. The demand of bricks could be met by establishing small units near thermal power stations and to meet the local demand with less transportation costs.

Basis and Presumptions

  • It is assumed that the unit will operate on single shift basis for 300 working days in a year.
  • The salary and wages for staff and labour has been taken into consideration on the basis of prevailing market rates.
  • To reach the full plant capacity, it requires 1 year after trial production.
  • Interest rate at 13% is considered in the project profile for both recurring and nonrecurring investment.
  • Margin money will vary from 10- 25% depending upon the location and scheme adopted by the entrepreneur.
  • Operative period of project is around 10 years considering technology obsolescence rate and period of repayment of loan.
  • The costs of land, construction charges, machinery and equipment, raw materials, and consumables, other contingent expenses etc. indicated in the scheme are based on the prices, prevailing at the time of project preparation. Therefore, these are subject to necessary changes from time to time based on the local conditions.

Implementation Schedule


Period Starting

Period Completion

Survey of collection of data in respect of demand, availability of technology, power, land and clearance from State Pollution Control Board 1day to 2nd month
Arrangement for margin money 2nd to 3rd
Preparation of project report and registration 2nd to 3rd
Finance assistance 2nd to 4th
Development of Site and construction of building 5th to 7th
Machine purchasing and installation 5th to 8th
Trial production 8th month

Technical Aspects

Process of Manufacture

Fly ash, lime sand and gypsum are manually fed into a pan mixer where water is added in the required proportion for intimate mixing. The proportion of the raw material is generally in the ratio 60-80% of fly ash 10-20% lime, 10% Gypsum and 10% sand, depending upon the quality of raw materials.

After mixing, the mixture is shifted to the hydraulic/mechanical presses. The bricks are carried on wooden pellets to the open area where they are dried and water cured for 21 days. The bricks are tested and sorted before despatch.

Quality Control and Standards

The Bureau of Indian Standards has formulated and published the specification for maintaining quality of product and testing purpose.

IS 12894:1990.

Production Capacity (Per year)

Quantity (Nos.) : 60 Lakhs bricks

Motive Power 30 KW.

Pollution Control

The technology adopted for making fly ash bricks is eco-friendly. It does not require steaming or auto calving as the bricks are cured by water only. Since the firing process is avoided, there are no emissions and no effluent is discharged. On the other hand, it solves the problem of fly ash disposal.

Energy Conservation

General precautions for saving electricity are required to be followed by the unit by adopting energy conservation techniques not only to conserve the power but also to save considerable expenditure in their own and also in the interest of the nation as a whole.

Financial Aspects

A Fixed Capital

Land and Building



Land 1 Acre @ Rs. 1200000 1200000
Building Area 165 sq. mt. @ Rs. 5000 per sq mt. 825000
Working Shed 150 sq. mt. @ Rs. 4000 per sq. mt. 600000
Boundary Wall, Gate L.S. 112519
Fly Ash Pond and Curring Tank L.S. 200000
Total 2937519

Machinery and Equipments


Ind./ Imp.


Price (Rs.)

Pan mixer (run by 20 HP motor) Ind. 2 200000
Gauge winding machine Ind. 2 450000
Belt Conveyor (Run by 3 HP motor) Ind. 1 100000
Deep Tube Well Ind. 1 80000
Generator - 1 250000
Steel Plates and Extra Moulds - L.S. 150000
Trollies - L.S. 60000
Office, Furniture and Equipments - L.S. 60000
Installation and Erection charges - L.S. 70000
Total 1420000

Working Capital (Per Month)

Staff and Labour (per month)




Total Salary (Rs.)

Manager 1 15000 15000
Production Engineer 1 12000 12000
Skilled workers 5 6000 30000
Un-skilled workers 10 4000 40000
Chowkidars 3 3000 9000
Peons 2 3000 6000
Cashier-Cum-Clerk 1 6000 4000
Total 116000
Add Perquisites @ 22% 25520
Total 141520

Raw Materials (per month)


Ind./ Imp.

Qty. (Ton.)

Rate (P.Ton)

Value (Rs.)

Fly Ash Ind. 1000 120 120000
Lime Ind. 1100 112000 275000
Sand Ind. 120 35000 15000
Gypsum Ind. 1100 40000 137500
Total 547500

Utilities (per month)



Power 30000
Fuel 20000
Total 50000

Other Contingent Expenses (per month)



Postage and Stationery 2000
Telephone 4000
Transportation 10000
Insurance 5000
Repair and Maintenance 5000
Advertisement and Publicity 2500
Misc. Expenditure 5000
Total 33500
Total Recurring Expenditure (per month) (i+ii+iii+iv) 772520
Total Working Capital (for 2 months) 1545040

Total Capital Investment

Fixed Capital 4345000
Working Capital 1545040
Total 5890040

Financial Analysis

Cost of Production (per year)


Value (Rs.)

Total Recurring Cost 9270240
Depreciation on Building at 5% 141250
Depreciation on Machinery and Equipment @10% 136000
Depreciation on Office equipment @ 20% 12000
Interest on Total Capital Investment @ 13% 765705.2
Total 10325195.2

Turnover (per year)



Value (Rs.)

60 Lakhs Bricks 2 per bricks 12000000

Net Profit (per year)

  Turn Over – Production Cost
  Rs. 12000000 – 10325195.2

Net Profit Ratio


Net profit x 100

Total Turnover


1674804.8 x 100



Rate of Return


Net Profit (per year) x 100

Total Investment


1674804.8x 100



Break-even Point



Depreciation on building @ 5% 141250
Depreciation on Machinery and Equipment @ 10% 136000
Depreciation on Office Equipment @ 20% 12000
Interest on Total Capital Investment @ 13% 765705.2
Insurance 60000
40% of Salary and Wages 679296
40% of Other Contingent Expenses (excluding insurance) 136800
Total 1931051.2


Fixed cost x 100

Fixed cost + Profit


1931051.2 x 100

1931051.2 +1674804.8



Addresses of Machinery and Equipment Suppliers

  • M/s. Jindal Hydraulics
    D-203, Sector-10,
    Noida (UP)

  • Raw Material Suppliers

  • NTPC's and Thermal Power Plants for Fly Ash.
  • M/s. Stark and Co.
    17, Najafgarh Road,
    Near Jakhira Chowk,
    New Delhi - 110015

  • Technology

  • Central Building Research Institute
    Roorkee - 247 667 (U.P.)
  • National Council for Cement and
    Building Materials
    KM Stone, Delhi - Mathura Road,
    Ballabhgarh - 121 004
    Distt. Faridabad (Haryana)
  • Institute for Solid Waste
    Research and Ecological
    Balance, Vishakhapatnam.

For further information please contact

Information Manager
TIMEIS Project