PERVIOUS CONCRETE

1. Seminar PresentationSeminar Presentation
onon
PERVIOUS CONCRETEPERVIOUS CONCRETE
Seminar Guide:-Seminar Guide:- Presented by:-Presented by:-
Dr. V. Sarath BabuDr. V. Sarath Babu Deepak Tiwari 141539Deepak Tiwari 141539
Devagya P. Singh 141540Devagya P. Singh 141540
Dharamveer Singh 141543Dharamveer Singh 141543

2. INTRODUCTION
 Pervious concretePervious concrete is a special type of concrete with a highis a special type of concrete with a high
porosity used for concrete flatwork applications.porosity used for concrete flatwork applications.
 It allows water from precipitation and other sources to passIt allows water from precipitation and other sources to pass
directly through, thereby reducing the runoff from a site anddirectly through, thereby reducing the runoff from a site and
allowing groundwater recharge.allowing groundwater recharge.

3.  It is also known as gap graded concreteIt is also known as gap graded concrete or permeable
concrete.
 Pervious concrete has little or no fine aggregate.Pervious concrete has little or no fine aggregate.

4. It consists of 15 to 35% voids, allowing for quick drainage.
The infiltration rate of pervious concrete will fall into the range of
80 to 720 liters per minute per square meter.

6. Topic to be DiscussedTopic to be Discussed
IntroductionIntroduction
Need of Pervious ConcreteNeed of Pervious Concrete
ComparisonComparison
MaterialMaterial
PropertiesProperties
ApplicationApplication
AdvantagesAdvantages
DisadvantagesDisadvantages
ConclusionConclusion
ReferenceReference

7. NEED OF PERVIOUS CONCRETENEED OF PERVIOUS CONCRETE
 A large amount of rain water ends up falling onA large amount of rain water ends up falling on
impervious surfaces such as parking lots, drive ways,impervious surfaces such as parking lots, drive ways,
sidewalks, ad streets rather than soaking into the soil.sidewalks, ad streets rather than soaking into the soil.
 This creates an imbalance to the natural ecosystem andThis creates an imbalance to the natural ecosystem and
leads to a host of problems including erosion, floods,leads to a host of problems including erosion, floods,
ground water level depletion and pollution of rivers, lakesground water level depletion and pollution of rivers, lakes
etc..etc..

8. 
InsteadInstead of constructing them with conventional concrete orof constructing them with conventional concrete or
asphalt, we should be switching to pervious concrete orasphalt, we should be switching to pervious concrete or
porous pavement.porous pavement.
Pervious concrete also naturally filters water from rainfallPervious concrete also naturally filters water from rainfall
or storm and can reduce pollutant loads entering intoor storm and can reduce pollutant loads entering into
streams, ponds and rivers.so in this way it helps in groundstreams, ponds and rivers.so in this way it helps in ground
water recharge.water recharge.

10. COMPARISON OF PERVIOUS ANDCOMPARISON OF PERVIOUS AND
IMPERVIOUS CONCRETEIMPERVIOUS CONCRETE
PERVIOUS CONCRETEPERVIOUS CONCRETE
IMPERVIOUSIMPERVIOUS
CONCRETECONCRETE

12. MATERIALSMATERIALS
 Pervious concrete mainly consists of:Pervious concrete mainly consists of:
 Ordinary Portland cementOrdinary Portland cement
 Coarse aggregate (19mm – 9.5mm)Coarse aggregate (19mm – 9.5mm)
 Water (Free from salts and impurities)Water (Free from salts and impurities)
 In normal concrete the fine aggregates typically fills the voidsIn normal concrete the fine aggregates typically fills the voids
between the coarse aggregates.between the coarse aggregates.
 In pervious concrete fine aggregate is non-existent or presentIn pervious concrete fine aggregate is non-existent or present
in very small amounts (<10% by total weight of aggregates).in very small amounts (<10% by total weight of aggregates).

13. Ranges of Materials Proportions in PerviousRanges of Materials Proportions in Pervious
ConcreteConcrete..
MATERIALMATERIAL PROPORTIONSPROPORTIONS
Cementitious materialsCementitious materials 270 to 415270 to 415 Kg/mKg/m33
AggregateAggregate 1190 to 14801190 to 1480 Kg/mKg/m33
Water: Cement ratioWater: Cement ratio
(by mass)(by mass)
0.27 to 0.340.27 to 0.34
Aggregate: cement ratioAggregate: cement ratio
(by mass)(by mass)
4 to 4.5:14 to 4.5:1
Fine: coarse aggregateFine: coarse aggregate
ratioratio
(by mass)(by mass)
0 to 1:10 to 1:1

14.  A mix design with little water can
create a very weak binder. This
will create a very dry mix that is
susceptible to spalling and
crumbling.
 Correct amount of water.
 A mix design with too much
water can collapse the void
space, making an almost
impenetrable concrete
surface

16. Typical composition of PerviousTypical composition of Pervious
ConcreteConcrete

17. PROPERTIES OF PERVIOUSPROPERTIES OF PERVIOUS
CONCRETE:CONCRETE:
Properties ofProperties of Fresh Pervious Concrete:Fresh Pervious Concrete:
 The plastic pervious concrete mixture is stiff compared toThe plastic pervious concrete mixture is stiff compared to
traditional concrete.traditional concrete.
 Slumps, when measured, are generally less than ¾ inchesSlumps, when measured, are generally less than ¾ inches
(20 mm), although slumps as high as 2 inches (50 mm)(20 mm), although slumps as high as 2 inches (50 mm)
have been used.have been used.
 However, slump of pervious concrete has no correlationHowever, slump of pervious concrete has no correlation
with its workability it is not be specified as an acceptancewith its workability it is not be specified as an acceptance
criterion.criterion.

18. Properties of Hardened PerviousProperties of Hardened Pervious
Concrete:Concrete:
Density and Porosity:Density and Porosity:
 The densities are in the order of 1600 kg/mThe densities are in the order of 1600 kg/m33
to 2000kg/mto 2000kg/m33
..
 The void contents of the pervious concrete ranges from 20The void contents of the pervious concrete ranges from 20
to 25%.to 25%.

19. Compressive Strength:Compressive Strength:
 Pervious concrete mixtures can develop compressivePervious concrete mixtures can develop compressive
strengths in the range of 3.5 MPa to 28 MPa.strengths in the range of 3.5 MPa to 28 MPa.
 Typical values are about 17 MPa.Typical values are about 17 MPa.
Flexural strength:Flexural strength:
 Flexural strength in pervious concretes generally rangesFlexural strength in pervious concretes generally ranges
between about 1 MPa and 3.8 MPa.between about 1 MPa and 3.8 MPa.

20. GraphGraph
Compressive Strength and DaysCompressive Strength and Days

21. Permeability:Permeability:
 Typical flow rates for water through pervious concrete areTypical flow rates for water through pervious concrete are
120 L/m²/min120 L/m²/min

22. APPLICATIONS:APPLICATIONS:
The various applications of pervious concrete are as follows:The various applications of pervious concrete are as follows:
 Residential roads, alleys, and drivewaysResidential roads, alleys, and driveways
 Low-volume pavementsLow-volume pavements
 Sidewalks and pathwaysSidewalks and pathways
 Parking areasParking areas
 Tennis courtsTennis courts
 Sub base for conventional concrete pavementsSub base for conventional concrete pavements
 Well liningsWell linings
 Swimming pool decksSwimming pool decks
 Noise barriers.Noise barriers.

23. ADVANTAGES :
 Reduces runoff from site.Reduces runoff from site.
 Helps in unchanging ground water.Helps in unchanging ground water.
 Eliminates need for retention ponds & other costly stormEliminates need for retention ponds & other costly storm
water management practices.water management practices.
 Provides for more efficient use of land development.Provides for more efficient use of land development.
 Water resources are conservedWater resources are conserved
 Adjacent trees and vegetation are allowed moreAdjacent trees and vegetation are allowed more
rainwater.rainwater.
 The permeability of pervious concrete providesThe permeability of pervious concrete provides
increased safety for drivers.increased safety for drivers.

24. PERVIOUS CONCRETE RESIDENTIAL STREET SHOWING
WATER INFILTRATION

25. Walkway in Beijing, China built for 2008 Olympics

26. Residential RoadsResidential Roads

27. DisadvantagesDisadvantages
 Difficult in providing the reinforcementDifficult in providing the reinforcement
 Frequent maintenance is requiredFrequent maintenance is required
 Compressive strength is comparatively lessCompressive strength is comparatively less
 Require more time and experimental works for theRequire more time and experimental works for the
constructionconstruction
 It cant be used for the construction of bridges, buildings,It cant be used for the construction of bridges, buildings,
dams and so on….dams and so on….

28. Pervious concrete in IndiaPervious concrete in India
 Pervious concrete can be successfully used in India inPervious concrete can be successfully used in India in
applications such as parking lots, driveways,applications such as parking lots, driveways,
gullies/sidewalks, road platforms, etc.gullies/sidewalks, road platforms, etc.
 Massive urban migration in Indian cities is causing theMassive urban migration in Indian cities is causing the
ground water to go much deeper and is causing waterground water to go much deeper and is causing water
shortages.shortages.
 In future with increased urbanization, diminishing groundIn future with increased urbanization, diminishing ground
water levels and focus on sustainability, technologies suchwater levels and focus on sustainability, technologies such
as pervious concrete are likely to become even moreas pervious concrete are likely to become even more
popular in India as well as other countries.popular in India as well as other countries.

29. ConclusionConclusion
 Saving in materials:-Saving in materials:- AsAs no-fines concreteno-fines concrete
contains no sand and consequently requirescontains no sand and consequently requires
considerably less cement per cubic yard of concrete,considerably less cement per cubic yard of concrete,
there is a direct saving in materials.there is a direct saving in materials.
 High thermal insulation value:High thermal insulation value:-Because of its nature,-Because of its nature,
which allows the formation of large voids, it has betterwhich allows the formation of large voids, it has better
insulating characteristics than conventional concrete.insulating characteristics than conventional concrete.
 Environmental Benefits:-Environmental Benefits:- Reduces storm waterReduces storm water
runoffrunoff

31. References:References:
 Karthik H . Obla., “pervious concrete – an overview,” IndianKarthik H . Obla., “pervious concrete – an overview,” Indian
Concrete Journal, August 2010 pp. 9-18.Concrete Journal, August 2010 pp. 9-18.
 NRMCA, “What, Why, and How? Pervious Concrete,NRMCA, “What, Why, and How? Pervious Concrete,
“Concrete in practice series, CIP 38, Silver Spring,“Concrete in practice series, CIP 38, Silver Spring,
Maryland, May 2004, 2pp..Maryland, May 2004, 2pp..
 Pervious concrete pavements, southeast Association,Pervious concrete pavements, southeast Association,
www.pervious.infowww.pervious.info
 NRMCA, “Freeze Thaw Resistance of Pervious Concrete,”NRMCA, “Freeze Thaw Resistance of Pervious Concrete,”
National Ready Mixed Concrete Association, May 2004.National Ready Mixed Concrete Association, May 2004.
 RMC Research Foundation Pervious Concrete ResearchRMC Research Foundation Pervious Concrete Research
Compilation: Past, Present and Future.Compilation: Past, Present and Future.
 CONCRETE TECHNOLOGY TODAY, Portland CementCONCRETE TECHNOLOGY TODAY, Portland Cement
Association.Association.

32. THANK YOU..!THANK YOU..!