The document describes fly ash bricks, which are made from a mixture including fly ash, cement, lime, gypsum, and sand or stone dust. Fly ash bricks offer advantages over conventional bricks like higher compressive strength, lower water absorption, and more uniform size. They use fewer raw materials and require fewer bricks for the same construction, lowering costs by around 30%. The manufacturing process involves mixing, compacting the mixture using hydraulic brick presses, and curing the final products.

1. Viralkumar_Trainee Mechanical Engineer @ Neptune Ind. 1 | P a g e
“Fly Ash Brick Manufacturing Machine – Fly Ash Technology”
What is the Fly Ash Brick?
 Fly ash is product of a burnt pulverized Bituminous coal.
 In past few Decades, R&D efforts were undertaken and it has been proved that this material can be utilized in
number of ways in building construction product as well as in civil works with adequate durability.
 Major areas of fly ash utilization are building materials such as bricks, blocks, tiles etc.
 Fly ash brick is product of Basic cement, fly ash, Stone dust/sand, Lime, Gypsum & Bonding Agent.
 The mixture is so ideally worked out to produce bricks higher strength with consistency as well as uniformity.
 Manufacturing process is fully automatic.
Advantages:
Durability
 High compressive strength compare to conventional brick
 Lower water absorption
 Higher resistance
Aesthetic Appeal
 Smooth surfaces & uniform sizes
 Better thermal properties
 Thinner masonry joints
Economy
 Lesser numbers of bricks consumption
 Low wastage components
 Almost 30% lower cost per unit of construction.
Fly Ash Technology Features:
Sr No Particulars Specification
1 Weight of Bricks 2.75 – 3.00 Kg / block
2 Compressive Strength 50-80 Kg / cm2
3 Absorption of water 12-16%
Raw Material:
Sr No Particulars Specification
1 Fly Ash 50-70%
2 Sand 15-20%
3 Lime & Gypsum 15-20%
4 Cement 05-08%

2. Viralkumar_Trainee Mechanical Engineer @ Neptune Ind. 2 | P a g e
Conventional Red bricks v/s Fly Ash Bricks:
Particular Red bricks Fly Ash Bricks
Strength 40-65 Kg/cm2
70-120 kg/cm2
Shape & Size Non uniform & Irregular Uniform & regular
Water Absorption 20-25% 10-15%
Breakage / Wastage 8-10% 3-4%
Density 1500-1700 kg/gm3
1200-1350 kg/gm3
Numbers of bricks for
100 sq.ft wall of 9” thick
1100 Nos 925 Nos
Fly Ash Brick Manufacturing Machine:
List of basic parts of Fly Ash brick manufacturing Machine:
1) Pan Mixer
2) Belt Conveyor
3) Box feeder
4) Press feed hopper
5) Press Feeding system
6) Hydraulic bricks press

3. Viralkumar_Trainee Mechanical Engineer @ Neptune Ind. 3 | P a g e
Process Flow:
Knowledge_Skills_Experience:
 AutoCAD, Solidworks, Manufacturing, Operations, Mechanical assembly & Fabrication process, Continuous
improvement, 2D-3D part design, GD&T, BOM, Inventory Management, QC
Raw Material Feeding System
(Manual weighing / volumetric
control feeding)
Dry / Wet Mixing
(Intensive/Rapid mixing cycle with
manual water feeding)
Bricks Production
(By powder compacting with world
class advanced pressing technology)
Green Product Handling
(Manually/Hydraulic palletizing
system on wooden/steel pallets)
Curing System
(Manual curing system by sprinkling
water jet/mechanized mist curing
system- steam curing)