Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious...
Transcript of Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious...
![Page 1: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/1.jpg)
Pervious Concrete When it Rains, it Drains
Darrell F Elliot, FACI
Buzzi Unicem USA
![Page 2: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/2.jpg)
What is Pervious Concrete?
Open cell structure allows water to pass through
AKA – Porous Concrete
– Permeable Concrete
– Gap-Graded Concrete
– No-Fines Concrete
– Enhanced-Porosity Concrete
![Page 3: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/3.jpg)
![Page 4: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/4.jpg)
Applications
First used in 1852 in residential walls in Europe when sand & other fine aggregates were not readily available
Primary use as a pavement
– Parking areas
– Sidewalks & pathways
– Residential roads, alleys and driveways
– Shoulders & Medians
– Under Overpasses & Bridges
![Page 5: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/5.jpg)
Parking Areas
![Page 6: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/6.jpg)
Sidewalks
![Page 7: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/7.jpg)
Nature Paths
![Page 8: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/8.jpg)
Streets and Roadways
![Page 9: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/9.jpg)
Driveways
![Page 10: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/10.jpg)
Concept
When rain falls, much of it will flow off impermeable surfaces into storm drains, creeks, rivers, and low areas.
–Volume
–Contaminants
![Page 11: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/11.jpg)
Concept
With pervious concrete, this water is captured and contained.
–Used to recharge the ground water
–Provides natural filtration
![Page 12: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/12.jpg)
Typical Section
![Page 13: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/13.jpg)
Pervious Pavement System
STORMWATER IN
STORMWATER OUT
PERVIOUS
CONCRETE
PAVEMENT
AGGREGATE
BASE
SUBGRADE
![Page 14: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/14.jpg)
Pervious Pavement Cross
Section (Warmer Climates)
Filter Fabric
6”
6”
+
Pervious Concrete
Aggregate Base
Subgrade
Stormwater
Curb
![Page 15: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/15.jpg)
Deeper Reservoir
![Page 16: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/16.jpg)
Perforated Pipes
![Page 17: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/17.jpg)
Trenches and Perforated Pipes
![Page 18: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/18.jpg)
Boreholes or Darcy Columns
![Page 19: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/19.jpg)
340” of Rain per Hour
![Page 20: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/20.jpg)
Concept
Can be designed as “Passive” to capture the rainwater that falls on the pavement area.
Can be designed as “Active” to capture additional rainwater.
![Page 21: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/21.jpg)
Mitigates surface pollutants
Not an oil-based pavement material
Reduce first flush pollutants – Oil
– Anti-freeze
– Other automotive fluids
– Various Chemicals
Treats pollutants naturally – Contaminated water percolates into the ground
– Soil chemistry & biology “treat” water naturally
![Page 22: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/22.jpg)
Cost Advantages
Zoning ordinances on impervious surfaces
Stormwater utility fees
Eliminates need for detention ponds, retention ponds & other costly stormwater management practices
Provides for more efficient use of land
![Page 23: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/23.jpg)
2
3
Traditional Parking Lot
![Page 24: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/24.jpg)
2
4
Smaller Retention
Pond
Pervious Parking Stalls
Fewer Light Poles
![Page 25: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/25.jpg)
Pervious Parking Lot
Retention Pond
Eliminated
Fewer Lights
2X Parking
Space
![Page 26: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/26.jpg)
Mix Design
If you want concrete to drain water, you need to have voids.
To create voids we take out most, if not all, of the sand.
![Page 27: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/27.jpg)
Conventional vs. Pervious
Conventional Concrete Pervious Concrete
![Page 28: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/28.jpg)
Mix Design
If we take out all the sand, we need more coarse aggregate.
To determine how much, take the “dry rodded weight” of the stone and multiply it by 27.
DRW = 99.5 X 27 = 2686
![Page 29: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/29.jpg)
Mix Design
Aggregate size can range from:
#67 (3/4 in. to No.4)
#89 (3/8 in. to No. 50)
Too coarse = texture too open
Too fine = not enough voids
Narrow gradation = maximum voids
![Page 30: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/30.jpg)
Mix Design
Most pervious mixes have between 450 to 700 pounds of cementitious materials in a cubic yard.
The shape and size of the CA and the end usage of the pervious will determine the amount.
May use portland or a combination/blend of portland with slag and/or fly ash
![Page 31: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/31.jpg)
Mix Design
Water is next…How much?
Typical w/cm ratios are 0.27 to 0.34 (up to 0.40)
If we are using 600# of cementitious at a 0.30 w/cm then we have 180# of water.
![Page 32: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/32.jpg)
Mix Design
Correct Water Content
The mixture should have a sheen without water flowing off of the aggregate
A handful of pervious concrete formed into a ball should not crumble
Pervious concrete should have a stiff consistency
Too
Little
Water
Proper
Amount
Of Water
Too
Much
Water
![Page 33: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/33.jpg)
Mix Design
Since there is cementitious material in the mix, we can use chemical admixtures.
Admixtures have become a very important part of pervious concrete.
– Retarder or Hydration Controlling Admixture
– Water-Reducing Admixture or Mid-Range
– Viscosity Modifying Admixture
– Air-entraining admixture
![Page 34: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/34.jpg)
Mix Design
Cement: (450-) 600-700 pounds
Fly Ash or Slag substitution possible
Water/Cement Ratio: 0.27 to 0.34 (to 0.40)
Single Size Coarse Aggregate: #67, #89
Aggregate-cement ratio: 4 to 4.5:1
2000-2700 lbs.
Optional:
– Admixtures, color, fibers
Work with local RM supplier to achieve required performance
![Page 35: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/35.jpg)
Fresh Properties Low slump about ½” to 2”
For QC, density is the preferred measurement (100 to 125 pcf)
Placement and haul times reduced, as increased surface area leads to increased evaporation rates (usually 1 hr. between mixing & placing)
Mandatory mixing requirements for optimum consistency
Admixtures can help
![Page 36: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/36.jpg)
Hardened Properties Typical compressive strength of 2500+ psi
15% to 25% void structure facilitates permeability
3-8 Gallons of water transfer per square foot per minute = 340” of rain per hour
5” section with 20% voids holds 1” of rain water
Base design important to storage as well
Roughly ½ the shrinkage of normal concrete
![Page 37: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/37.jpg)
Compliance Testing
ACI 522R-06
Voids, Thickness, & Compressive Strength In-place From Cores
Unit Wt. Tests
![Page 38: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/38.jpg)
Pervious vs. Conventional Concrete
◊ Aggregate –Smaller Aggregates, Typically ◊ W/C Ratio – LOWER ◊ Set Time – FASTER (most cases, but
modifiable) ◊ Strengths – LESS (due to lower density &
15-30% voids)
◊ Durability – SIMILAR (except abrasion) ◊ Shrinkage & Cracking - LESS ◊ Curing Sensitivity – MUCH HIGHER ◊ Appearance – OPEN GRADED ◊ Costs – In-Place is more
![Page 39: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/39.jpg)
Durability Freeze-thaw resistance
–Appropriate test method
– Importance of drainable base
–Air entrainment for paste
Sulfate resistance
–Similar precautions as in ACI-201
Abrasion resistance
![Page 40: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/40.jpg)
Typical Placing Procedures (can vary by market)
![Page 41: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/41.jpg)
Layers
![Page 42: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/42.jpg)
Compacted – Top ~½”
![Page 43: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/43.jpg)
Finishing
![Page 44: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/44.jpg)
Joint
JOINTS
Joints can be grooved or sawcut
Can be placed with no joints.
No joint sealant needed
![Page 45: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/45.jpg)
Jointing
“Pizza Cutter”
![Page 46: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/46.jpg)
No Joints
![Page 47: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/47.jpg)
Surface Texture
![Page 48: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/48.jpg)
Colors
![Page 49: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/49.jpg)
Stamped
![Page 50: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/50.jpg)
Curing pervious concrete is critical due to
the porosity and low water-cement ratio.
CURING
![Page 51: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/51.jpg)
Opening to Traffic
After 7 days
Depending on weather conditions
![Page 52: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/52.jpg)
Maintenance
Majority of pervious concrete needs little or no maintenance
– Handled in original design and site plan
– Prevent flow of debris onto pavement surface
Clogged pervious concrete
– Vacuuming surface
– Pressure washing
Maintenance practices still under development
![Page 53: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/53.jpg)
Regular Maintenance
Vacuum Sweep Periodically
![Page 54: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/54.jpg)
Maintenance if Clogged Power Wash First Then Vacuum Sweep
![Page 55: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/55.jpg)
Pervious Concrete –
NRMCA Certification Program
For Contractors
Modeled after ACI’s Flatwork Finisher Certification
Program is administered by local sponsoring groups
Goal is to ensure that knowledgeable contractors are
selected to place pervious concrete
Two Certification Levels Are Possible:
Pervious Concrete Technician Must pass a written exam
Pervious Concrete Craftsman Must pass a written exam
Work experience and/or pass a performance exam
![Page 56: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/56.jpg)
Additional Information
www.nrmca.org
www.cement.org
www.aci-int.org
Search “Pervious Concrete”
![Page 57: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/57.jpg)
PCA/NRMCA Hydrologic
Design Software
![Page 58: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/58.jpg)
Specifications for Pervious
ACI 522.1-08
www.concrete.org
Specifications:
Fresh properties
Hardened properties
Contractor qualifications
![Page 59: Pervious Concrete Concrete... · Mix Design If you want concrete to drain water, ... Pervious Concrete Craftsman Must pass a written exam Work experience and/or pass a performance](https://reader033.fdocuments.in/reader033/viewer/2022042600/5a7163767f8b9aa7538cced0/html5/thumbnails/59.jpg)
Thank You !!