It is an important application for sustainable construction and is one of many low impact development techniques used by builders to protect water quality.
Properly designed and constructed Permeable Pavement Systems provide a Structural and Hydraulic solution forsitework pavement loading conditions, stormwater detention and quality improvement requirements.
Prepared By: Ravi Kumar
Porous (pervious) concrete is a
special type of concrete with a high
porosity used for concrete flatwork
applications that allows water from
precipitation and other sources to
pass directly through, thereby
reducing the runoff from a site and
allowing groundwater recharge .
The high porosity is attained by a
highly interconnected void content.
It is a mixture of Cement, Corse aggregate and
with or without sand (Fine aggregate) and has
enough cementitious paste to coat the coarse
aggregate while preserving the interconnectivity
of the voids.
This concrete is being used as paving material to
solve or reduce the storm water runoff to the
drainage system and minimize water logging
Porous Concrete: when it rains, it drains.
270 - 415 Kg/m3
0.20 - 0.45
1190 - 1600 Kg/m3
15% - 35 %
Note: Retarders are often used to control the normal
rapid setting of pervious concrete.
Pervious concrete mix proportion used in various geographic
355 kg/m3 370 kg/m3
75 to 90
Water/Cementitious 0.21 - 0.25 0.28
Density: In place densities on the order of 1600
kg/m³ to 2000 kg/m³.
Void: Concrete with a high volume of voids
(20% to 35%)
Permeability: Typical flow rates for water
through pervious concrete are 120 L /m2/min, or
0.2 cm/s to 320 L /m2/min, or 0.54 cm/s.
Compressive Strength: 3.5 MPa to 28 Mpa
Flexural Strength : 1 Mpa to 3.8 Mpa
Shrinkage : Drying shrinkage of pervious
concrete develops sooner, but is much less than
conventional concrete in order of 200 10-6 have
Freeze-Thaw : Entrained air in the paste
dramatically improves freeze-thaw protection for
Age & Compressive
Saving in materials- As no-fines concrete
contains no sand and consequently requires
considerably less cement per cubic yard of
concrete, there is a direct saving in materials.
High thermal insulation value-Because of its
nature, which allows the formation of large voids,
it has better insulating characteristics than
Environmental Benefits: Reduces storm water
Eliminates need for detention ponds and other
costly storm water management practices.
Replenishes water tables and aquifers.
highways generally are not suitable for pervious
concretes. pervious concrete pavements allow
snow to melt faster, requiring less plowing.
1. Yang J, Jiang G. Experimental study on properties of
pervious concrete pavement materials. Cem Concr
2. Malhotra VM. No-fines concrete: Its properties and
applications. ACI 1976;73(11):628–644
3. Technical Bulletin-0111 “Design
4. Tennis D. Paul et al. “Pervious Concrete Pavements”
5. Chindaprasirt .P, Cement paste characteristics and
porous concrete properties, Elesvier, Construction and
Building Materials 22 (2008) 894–901