This document summarizes a technical seminar presented on permeable pavement systems, specifically top mix permeable concrete. It defines permeable pavement that allows stormwater infiltration and discusses common types. It then focuses on advancements in pervious concrete, describing top mix permeable concrete as a fast-draining solution that directs stormwater runoff. The document outlines the water absorption capabilities and stormwater management benefits of top mix permeable concrete.

1. NARAYANA ENGINEERING COLLEGE
NELLORE
DEPARTMENT OF
CIVIL ENGINEERING

2. Presented by
G.AJITH KUMAR
13711A0122
A TECHNICAL SEMINAR ON
PERMEABLE PAVEMENT SYSTEMS-
TOP MIX PERMEABLE

3. Permeable pavement is a technique which allows storm
water to enter through it
In addition to reducing runoff, this techniques efficiently
traps suspended solids, filters and pollutants from water
Examples for this types of systems includes roads, paths,
lawns and lots that are subjected to light traffic.
INTRODUCTION

4. Pervious concrete
Porous asphalt
Plastic grids
Usage of single sized aggregates
Permeable interlocking concrete pavements
Types of permeable pavement systems

5.  Low volume pavements
 Residential roads and drive ways
 Side walks
 Parking lots
 Well linings
 Swimming pools decks
Advantages of permeable pavement
systems

6. Concrete is a composite material composed of
aggregate bonded together with a fluid cement which
hardens over time. Most use of the term "concrete"
refers to Portland cement concrete or to concretes
made with other hydraulic cements, such as cement.
However, road surfaces are also a type of concrete,
"asphaltic concrete", where the cement material is
bitumen.
CONCRETE

7.  Pervious concrete is one of the best technique for storm
water removal on pavements and parking lots
 The recent advancement in pervious concrete is “top mix
permeable pavement”
 The top mix permeable concrete is also known as “TOP
MIX PERMEABLE”
 It is a fast draining concrete pavement solution that rapidly
directs storm water off-streets, parking surfaces.
Advancements in pervious concrete

8.  The building material company Tarmac has
developed a new kind of concrete that is
capable of absorbing up to 4,000 liters (1057
gallons) of water in the first minute. On
average, one square meter of this new road
surface, called “Top mix Permeable,” can
drain 600 liters (159 gallons) in a minute
About TOP MIX PERMEABLE

9.  A type of concrete that “drinks” water on its surface is being
marketed to areas where flash flooding and puddles are a
problem.
 The Topmix Permeable concrete by Tarmac can absorb 880
gallons of water in 60 sec, one sq area according to a
recent article in the Daily Mail.
 The daily newspaper said the concrete solution works by
having a permeable layer of concrete on the surface that
allows the water to seep through large pebbles and into a
loose base of rubble.
WHAT IS TOP MIX PERMEABLE

10.  Topmix can help rapidly remove water from
roadways, preventing the potentially dangerous
buildup of standing water. As it is absorbed, storm
water is filtered through a porous layer of pebbles,
removing petroleum hydrocarbons and other
pollutants commonly found on roadways before the
water is ultimately returned to the water table

14.  During some periods this characteristic can aid in
delaying the discharge of surface water into water
courses or drainage systems reducing the risk of
overwhelming systems and causing flash flooding.
During periods of rising temperatures and intense
rainfall, water stored within the system evaporates
creating a cooling effect reducing surface temperatures,
USE OF TOP MIX PERMEABLE

15.  As the world’s population continues to shift from rural to
urban areas, natural drainage systems are being replaced with
impermeable mostly concrete that hinder the environment’s
ability to drain rainwater. In a forest, for instance, somewhere
between 80 and 90 percent of rainwater is absorbed back into
the ground — in urban areas, that absorption can fall to just
10 percent of rainwater. Humans have dealt with this by
creating our own system of infrastructure storm water
drainage systems and sewer systems but much of this
infrastructure is becoming increasingly outdated and unable
to keep up with an increase in precipitation events linked to
climate change
WHY WE USE TOP MIX
PERMEABLE

16.  When extreme precipitation events overwhelm a city’s
available infrastructure, flash floods become an
increasingly damaging threat. In 2007, intense floods
throughout the United Kingdom caused some $4.8
billion in damage — but only 12 percent of flooding
incidents were related to an overflow from rivers. The
rest were caused by an overflow of surface water and
inadequate drainage.

19.  Rather than use sand-based concrete, Tarmac uses
something called no-fines concrete. It's made up of tiny
pieces of crushed granite packed together. While
Burgess says the mixture is extremely dry, the pieces are
packed loosely enough to allow water to pass through.
 The system can accommodate three designs: full
infiltration, partial infiltration, and full attenuation.

20. • Full infiltration refers to a system where all water
goes through Topmix to flow into the soil underneath. It's
particularly useful in wet areas that don't need to collect the
rainwater.
• Partial infiltration involves a semi-permeable barrier
beneath Topmix that acts as a drainage system into nearby
sewers or waterways — useful when the layer beneath
Topmix can't pass the water through on its own.
• Full attenuation uses a capture system to store all the water
that flows through Topmix. This option is most useful in
areas with unclean water and high recycling rates, since the
captured water can be reused later.

21.  The technology isn't quite ready for wide-scale
deployment.
 Tarmac notes that the permeable surface is prone to
damage from freezing water and therefore not suitable
for use in subzero temperatures.
 Furthermore, the product is not suitable for use on high-
volume roadways that bear heavy loads, although it can
be used on shoulder lanes, residential streets, pedestrian
and bike paths and parking lots
LIMITATIONS

22.  "Being able to control and actively manage the drainage
of rainwater from the developed landscape significantly
reduces the risk of surface water flooding, protecting
both the natural and built environment,"
CONCLUSION

23. ANY QUERIES?

24. THANK YOU