This document discusses types of waste materials that can be used to produce waste material based concrete, including organic waste like rice husk, inorganic waste like broken concrete and glass, and industrial wastes like blast furnace slag, coal ash, and red mud. Rice husk can be used to produce lightweight concrete, while broken concrete and glass can produce concrete of sufficient strength. Blast furnace slag and coal ash can partially replace cement and improve properties like chemical resistance. Silica fume can significantly increase strength and allow high water-cement ratios. Using these wastes can reduce costs and environmental impacts of concrete production.

1. Waste Material Based Concrete

2. What is waste material based
Concrete?
• A concrete that made using agro, urban and
industrial waste.
• They may be used as binder material, as
partial replacement of conventional Portland
cement or directly as aggregates in their
natural or processed states.

3. Waste Material Based Concrete
• Three types of wastes
• Organic Waste
• Inorganic Waste (Urban Waste)
• Industrial Waste

4. Organic Waste
• It is Plant originated namely saw dust, coconut pith,
rice husk, wheat husk, groundnut husk, etc.
• Rice Husk:
• Produced in rice mills each tonne of paddy produces
about 200 Kg of husk.
• Its bulk density is only 100 to 150 kg/cum.

5. Rice Husk
• It used as an aggregate for making light weight
concrete which is mainly suitable for making precast
blocks and slabs for walls and partitions.
• The ground reactive rice husk ash can be blended with
OPC to produce satisfactory hydraulic acid resistance
cements.
• More resistance to acid environment.
• When mixed with sand and lime in suitable proportions
with an appropriate quantity of water can be used to
cast bricks having density 1400-1600 kg/cum. And
compressive strength of 5-6 Mpa with water
absorption is 15-20%.

6. Inorganic Waste (Urban Waste)
• The inorganic wastes which are hard, particularly, the demolition waste
such as broken concrete, broken bricks and crushed glass can used to
produce concretes of requisite strength and durability.
• Broken or Recycled Concrete:
• Recycled concrete is the simply the old concrete that has been removed
from buildings, foundations, pavements and other structures and crushed
to the specified size.
• Recycled aggregate is used in production of concrete.
• This kind of concrete widely accepted for pavements, base and sub-base
courses and to some extend for foundation purpose.
• The lean concrete produced using recycled aggregate resulted in a saving
the cost of construction up to 30%.

7. Broken Brick Aggregate Concrete:
• It is obtained as rejected over burnt or damaged
bricks in brick works and at construction sites.
• It is used in concrete for foundation in light buildings,
flooring and walkways.
• Broken brick aggregate may also be used in
lightweight reinforced concrete floors.

8. Industrial Wastes
• Blast Furnace Slag:
• Produced during large quantities during production of iron &
steel.
• The granulated slag can be used in the manufacture of slag
cement.
• Blast furnace slag cements contain slag up to 60%, hence
there is considerable reduction in the rate of heat evolution
and a significant increase in the resistance to chemical attack.

9. Coal Ash from Power Station
• The main by-product is fly ash or pulverized fuel ash.
• Its proportion is generally limited to 30% in situation where
early strength is important.
• The low rate of heat evolution makes fly ash useful in mass
concrete.
• The fly ash concrete has resistance to sulphate attack.
• On the other hand fly ash reduces the the rate of
development of strength and increases drying shrinkage and
creep strains.

10. Industrial Wastes
• Red Mud Aggregate:
• It is by product of resulting from the production of
alumina from bauxite by bayer’s process is known as
red mud.
• Concrete made with this aggregate have more
compressive, tensile and flexural strengths than
gravel.

11. Silica-fume Concrete
• It is a by product of the reduction of high purity quartz with
coal in electric arc furnaces in the production of ferro-silicon
metal.
• It is efficient pozzolanic material.
• It suitable for high water cement ratio about 0.55 and higher.
• 1Kg of Silica Fume can replace 3 to 4 Kg of cement in concrete
without changing the compressive strength of aggregate.
• Ultra high strength concrete (80 to 125 MPa) is now possible
for field placeable concrete with silica-fume additive.
•