Innovative green concrete by partial replacement of aggregates by recycled concrete

1. INNOVATIVE GREEN CONCRETE BY
PARTIAL REPLACEMENT OF AGGREGATES
BY RECYCLED CONCRETE
RV College of
Engineering
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By:
SHAHID BASHIR MALIK
USN: 1RV19CV410

2.  Green concrete is revolutionary topic in the history of concrete
industry,
 It was first invented in Denmark in year 1998
 Green concrete is the type of concrete which is much like the
conventional concrete but the production of such concrete
requires minimum amount of energy and cause least harm to
environment.
 It has nothing to do with colour
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introduction
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3.  A concrete that made with concrete waste and uses less energy in its production
and produces less carbon dioxide than normal concrete
 It is also called eco- friendly concrete and reduces environmental impact e.g
energy saving, co2 emission, waste water
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Green concrete:
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4.  The main ingredients of concrete is cement and I consist of
limestone (calcium carbonate caco3)
 During manufacturing of cement, its ingredients are heated to about
800-1000 degree
 During this process the carbon dioxide is driven off.
 Approximately 1 kg of cement releases about 900g of carbon
dioxide into the atmosphere
 Therefore green concrete came into existence to reduce the
emission of carbon dioxide
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Why green concrete:
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5.  Recycled demolition waste aggregates
 Recycled concrete aggregates
 Blast furnace slag
 Manufacturing sand
 Glass aggregates
 Fly ash
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Materials for Green concrete:
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6. Materials and Methods
1. Cement
2. Aggregates
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Procedure for using recycled
concrete aggregates:
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7. Concrete Mix Proportions
 M30 Grade
 Mixing, Casting, and Curing of Concrete
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Contd……
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8. RV College of
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materials:
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Ingredient Size/ Grade
Cement OPC 43 Grade
Fine Aggregates 2.36 mm
Coarse Aggregates 10 mm
Coarse Aggregates 20 mm
Recycled Concrete aggregates M40 20MM
Water
Potable
Admixture (Plasticizer) Auramix-400

9. RV College of
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Results
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S.NO CEMENT
REDUCE
OLD
CNCRETE
REPLACE
DAYS COMPRESSIVE
STRENGTH
Ist
BATCH
0% 0% 28 DAYS 38.30Mpa
28 DAYS 39.92Mpa
28 DAYS 39.99Mpa
AVERAGE 39.40Mpa
2nd
BATCH
5.0% 15% 28 DAYS 37.57 Mpa
28 DAYS 39.55Mpa
28 DAYS 38.02Mpa
AVERAGE 38.38Mpa

10. As per our results, we came to conclusion that we can reduce aggregates by
15% as it does not show any effect on the strength of cube after 28 days
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conclusion
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11. Following are the major applications of green concrete
 It can b used in construction of briges
 In building construction
 In constructions of columns
 Also in road construction
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Applications:
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12. RV College of
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