Pervious Concrete
2012 MdQI Conference
Quality Transportation- A Hybrid Approach
Rod Meyers, P.E., CDT BASF Chemical Admixtures
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Our Watershed
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Peninsula Medical Center, Salisbury Maryland
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Peninsula Medical Center Salisbury Maryland
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Robinson Nature Center, Howard County, Maryland
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Measuring Fresh Density
and Voids ASTM C1688 Density and Void Content
of Freshly Mixed Pervious Concrete 0.25 ft3
measure (standard air pot)
Standard Proctor Hammer
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Sample ASTM C172
Fill in 2 lifts
Drop hammer full 12”
Drop 20 times/lift
ASTM C1688
2012 MdQI Conference Quality Transportation- A Hybrid Approach
ASTM C1688 Test Data Date Truck Number Density(lb/ft3) Voids (%)
11/18/10 Test Panel 126.4 21
12/2/10 28 124.4 20
12/2/10 141 127.6 20
12/3/10 91 126.0 21
12/3/10 111 128.4 20
12/4/10 30 124.8 22
12/4/10 89 129.2 19
12/11/10 109 125.6 21
12/1110 91 123.6 23
12/15/10 129.6 19
Average 126.6 21
Range 124.4 – 129.6 19-23
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Monitor Infiltration Capacity
• ASTM C1701
• Infiltration Rate of In
Place Pervious Concrete
2012 MdQI Conference Quality Transportation- A Hybrid Approach
ASTM C1688 Test Data Test Mass of
Water
(lbs)
Infiltration
time
(seconds)
Infiltration
Rate
(inches/hour)
1 40 90 seconds 410
2 40 80 seconds 460
3 8 22 seconds 330
MDE Stormwater Design Manual
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Retail/Office Building 4825 Butler Rd, Glyndon
2012 MdQI Conference Quality Transportation- A Hybrid Approach
North Bethesda Methodist Church Bethesda, Maryland
2012 MdQI Conference Quality Transportation- A Hybrid Approach
ACI 552-10, Report on Pervious
Concrete, section 3.3.1.1 Parking Lots
“The practical
range of design
thicknesses for
pervious
concrete
pavements is
from 5 to 12 in
for plain parking
lots.”
2012 MdQI Conference Quality Transportation- A Hybrid Approach
The American Concrete Institute
Committee Report ACI 522R-Pervious
Concrete, Chapter 7.2.2 states: “Guidance for structural design of conventional concrete
pavements is provided in ACI 330R for parking lots and in ACI
325.12R for streets and roads. These documents cover many
different aspects of paving design. The structural design
recommendations in these documents, however, are not necessarily
applicable for use with pervious pavement.
As there are no standardized test
methods for strength of pervious
concrete, design and specification by
strength should be avoided”.
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Flexural Strength vrs. Void Content
0
100
200
300
400
500
600
700
0 5 10 15 20 25 30 35
Void Content, percent by volume
28
-day
Fle
xu
ral
Str
en
gth
, p
si
Best Fit Line
Data
Flexural Strength, Fmr = 832.8 – 20.3 * (void content, %), psi
2012 MdQI Conference Quality Transportation- A Hybrid Approach
PerviousPave Software American Concrete Pavement
Association
PerviousPave available on the ACPA website at: www.pavement.com
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Pervious Pavements Parking lots
Streets/roads shoulders
Sidewalks
Driveways
Light traffic areas
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Morgan University Baltimore, Maryland
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Pervious concrete pavements are susceptible to collecting debris
YMCA, Westminster
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Low maintenance begins with good mix design
Improves
Permeability,
Freeze-thaw
Resistance
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Good curing
provides
durable
surface
Cherry Hill Nursing Home
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Low maintenance depends on good site design
Avoid
adjacent
areas
that
contribute
debris
North Bethesda Methodist Church
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Low maintenance depends on good site design
Avoid dirty water run-on. Morgan University
2012 MdQI Conference Quality Transportation- A Hybrid Approach
Protect during construction Cherry Hill Nursing Home