Pervious Concrete
Trust the Curve
Public Perception
F/T Durable
Strength
3 Different Projects
3 Different Producers
3 Different Installers
MCC Omaha, NE
Clogging
Concrete International
Uniformity
ASTM 1688
a+ Installation
ASTM 1701
Voids (%)
Unit Weight
ACI 318
-4500 psi
-0.45 w/c
-6% air
Prvs Conc.
-2500 psi
-0.30-.35 w/c
-15-25% air
f'c
=
Thickness is increased 
to compensate for flexural 
strength.....
We can give you 4000 psi....
but it won't drain...
"Meatball vs Modern"
Data Collection
Void Content:
21.6% + 13.8% + 15.8% 
+ 18.9% + 13.4%
}
{
5 samples
Avg. = 16.8%
Infiltration:
1319 + 2016 + 387 
+ 62 + 538 + 138
}
{
6 samples
Avg. = 743 in/hr
UNL Parking Garage
Lincoln, NE
More Data Collecting...
36 ft
Header Curb
"NO CONSTRUCTION
JOINTS"
Lots of Runoff from 
Impermeable Surfaces
Saw Cut
ASTM 1688
Quick Update
ASTM 1701
Case Studies
Sarpy County 
Sheriff
"trust the curve"
More Data...
Results....
Void Content:
No. 1   24.6%
No. 2  25.7%
No. 3  27.2%
AVG: 25.8%
Infiltration:
No. 1     105 in/hr
No. 2    330 in/hr
No. 3    440 in/hr
AVG: 250 in/hr
Overview
You are my 
"Density"
Shout out!
Jereme Montgomery
Nebraska Concrete &
Aggregates Association
Thank you...Questions?