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SECTION 32 14 43
POROUS FLEXIBLE PAVING
 
 
Copyright 2010 - 2015 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Presto Geosystems; porous pavement system.
.
** NOTE TO SPECIFIER ** This section is based on the products of Presto Geosystems, which is located at:
670 N. Perkins St. P. O. Box 2399
Appleton, WI 54912-2399
Toll Free Tel: 800-548-3424
Tel: 920-738-1707
Fax: 920-738-1222
Email: request info (info@prestogeo.com)
Web: www.prestogeo.com
[ Click Here ] for additional information.
.open.trap
PRESTO offers a full range of porous pavement needs with the Geoblock and GeoPave(R)systems and challenging soil and surface stabilization problems with the Geoweb(R) and GeoTerra(R) systems. The systems can be used in a variety of landscape applications meeting a wide range of performance and aesthetic requirements and provide economic and sustainable solutions in many areas of environmental design: permeable pavements, slope, channel and shoreline protection, vegetated earth retention and surface protection applications. Presto offers complimentary project evaluation service.
This section covers the Presto GeoPave(R) porous pavement system. The system provides vehicular and pedestrian load support with open-graded aggregate or aggregate/topsoil infill while protecting surfaces from harmful effects of traffic. Consult Presto Geosystems for assistance in editing this section for the specific application.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete any paragraphs below not applicable to project.
 
A.
Porous Flexible Paving.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required.
 
A.
Section 31 20 00 - Earth Moving.
B.
Section 33 46 19.13 - Underslab Drainage Piping.
C.
Section 32 10 00 - Bases, Ballasts, and Paving.
D.
Section 32 30 00 - Site Improvements.
E.
Section 32 90 00 - Planting.
F.
Section 32 92 26.13 - Stolonizing.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
CBR - California Bearing Ratio Method.
B.
ASTM D1693 - Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics.
1.4
SYSTEM DESCRIPTION
 
** NOTE TO SPECIFIER ** Edit and delete portions below not relevant to this project; add others as required. Vehicles should be limited to vehicles with a maximum tire pressure of 90 psi.
 
A.
Stabilized Aggregate Porous Paving System: Geopave System.
1.
Provides increased bearing strength and a permeable load support structure for vehicular or pedestrian traffic loading requirements using porous aggregate or structural infill material.
2.
Major Components of the Complete System include:
a.
GeoPave units.
b.
Porous aggregate or aggregate/topsoil engineered base, if required.
c.
Porous aggregate or aggregate/topsoil engineered infill.
 
** NOTE TO SPECIFIER ** Select one of the two following paragraphs for aggregate or vegetated surface and delete the one not required.
 
3.
Aggregate surface.
4.
Vegetated surface.
 
** NOTE TO SPECIFIER ** Edit the following paragraph as required for project. Consult with manufacturer for additional information.
 
5.
The GeoPave unit and base support soil work together to support an imposed loading as follows:
a.
Support gross vehicular loads of ________ lbs (________kg) maximum.
b.
Support gross pedestrian loads of ________ lbs (________kg) maximum.
1.5
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: Submit manufacturer's product data.
C.
Shop Drawings: Submit manufacturer's shop drawings including laying pattern and anchoring.
 
** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
 
D.
LEED Submittals: Provide documentation of how the requirements of Credit will be met:
1.
List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.
2.
Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.
E.
Samples: Submit manufacturers sample.
F.
Certificates:
1.
Product certificates signed by the manufacturer certifying material compliance of polyethylene used to make porous paving units.
2.
ISO Certification certifying manufacturer's quality management system is currently registered to ISO 9001:2008 quality standards.
G.
Installation Instructions: Manufacturer's printed installation instructions. Include methods for maintaining installed products.
H.
Manufacturers warranty.
1.6
QUALITY ASSURANCE
A.
Manufacturer ISO Certification: ISO Certification certifying manufacturer's quality management system for its porous paving system is currently registered to ISO 9001:2008 quality standards.
B.
The Manufacturer shall have a minimum of 20 years experience producing porous pavement systems.
C.
Manufacturer's Field Representative Qualifications: Manufacturer's field representative experienced in the installation of the specified products.
 
** NOTE TO SPECIFIER ** Retain subparagraphs below if required to suit project. Delete if not required.
 
D.
Installer Qualifications: Experienced in performing work of this section that has specialized in installation of work similar to that required for this project.
E.
Preinstallation Meetings: Convene a meetings a minimum of two weeks prior to start of porous paving system to verify project requirements, subbase conditions, manufacturer's installation instructions and coordination with other work. Require attendance of all parties directly affecting work of this section, including the Contractor, Architect, installer, and manufacturer's representative. Comply with Division 1 requirements.
1.7
DELIVERY, STORAGE, AND HANDLING
A.
Delivery: Deliver materials to site in manufacturer's original, unopened containers and packaging, with labels clearly identifying product name and manufacturer.
B.
Storage: Store materials in accordance with manufacturer's instructions.
C.
Handling: Protect materials during handling and installation to prevent damage.
1.8
WARRANTY
A.
Warranty: Manufacturer's ten year limited warranty.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Presto Geosystems, which is located at: 670 N. Perkins St. P. O. Box 2399; Appleton, WI 54912-2399; Toll Free Tel: 800-548-3424; Tel: 920-738-1707; Fax: 920-738-1222; Email: request info (info@prestogeo.com); Web: www.prestogeo.com
B.
Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
 
** NOTE TO SPECIFIER ** Delete paragraph above or below; coordinate with Division 1 requirements.
 
C.
Substitutions: Not permitted.
2.2
STABILIZED AGGREGATE POROUS PAVING SYSTEM COMPONENTS
 
** NOTE TO SPECIFIER ** GeoPave with aggregate or an aggregate/topsoil engineered infill provides a permeable, stabilized surface for vehicular and pedestrian load support.
 
A.
GeoPave Units:
1.
Materials:
a.
Polyethylene: Up to 97 percent recycled materials.
b.
Color: Ranges from dark shades of gray to black
c.
Color Uniformity: Uniform color throughout all units in pallet.
d.
Chemical Resistance: Superior.
e.
Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent by weight through addition of a carrier in accordance with ASTM D1693.
2.
Performance Properties:
a.
Empty Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 175 psi (1,202 kPa).
b.
Aggregate or Aggregate/Topsoil Infilled Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 5,160 psi (35,625 kPa).
c.
Empty Unit Wall Compressive Strength (Simulated Loaded Tire Area): 175 psi (1,202 kPa).
1)
Test Procedure: Full single unit loaded to failure via 9 inches (228.6 mm) flat plate.
d.
Aggregate or Aggregate/Topsoil Filled Unit Wall Compressive Strength (Simulated Tire Area Loaded): 138,240 pound-force (615 kN).
1)
Test Procedure: Full single unit loaded to failure via 9 inches (228.6 mm) flat plate.
3.
Dimensions:
a.
Nominal Width by Length: 20 inches by 40 inches) (0.50 m by 1.00 m).
b.
Nominal Length: 40 inches (1.0 meter)
c.
Nominal Depth: 2.0 inches (50 mm).
d.
Nominal Coverage Area: 5.38 square feet (0.50 sm).
1)
Cell Size (small cell): 3.25 inches by 3.25 inches (83 mm by 83 mm).
2)
Cell Size (large cell): 3.25 inches by 6.50 inches (83 mm by 165 mm).
e.
Nominal Weight per Unit: 8.0 pounds (3.6 kg).
f.
Top of Panel Open Area: 90.5 percent.
g.
Bottom of Panel Open Area: 32.6 percent.
h.
Bottom Mesh Openings: .25 in by .25 in (6.35 mm by 6.35 mm).
i.
Maximum Unit End-to-End or Side-to-Side Warpage: 0.24 inch (6 mm).
4.
Runoff: Runoff Coefficient: Dependent upon the actual site condition and GeoPave infill material.
a.
For vegetated areas, typical run-off coefficients range from 0.10 to 0.35 for sandy and clay soils, respectively.
b.
For aggregate areas, typical run-off coefficients range from 0.05 to 0.50. Since GeoPave units are filled with an open-graded aggregate with limited fines, the run-off coefficient shall range from 0 to 0.15.
c.
Actual run-off coefficient shall be based on site conditions, engineering judgment and the integrated effect of the drainage area
 
** NOTE TO SPECIFIER ** Edit the following for infill type, aggregate infill or an aggregate/topsoil engineering infill for vegetated systems.
 
B.
GeoPave Infill Material:
1.
Aggregate Infill: A well-graded 0.375 inch to 0.5 inch (10 mm to 13 mm) crushed angular stone with a fine content less than 5 percent.
2.
Aggregate/topsoil Engineered Infill: A homogenous blended mixture that will promote vegetative growth and provide the required structural support. Mixture shall consist of:
a.
Clear-stone/crushed rock with an AASHTO #5 or similar designation with a particle range from 0.375 inch to 0.5 inch (10 mm to 13 mm) and a percentage void-space of at least 30 percent.
b.
Pulverized Topsoil: Pulverized topsoil equaling 33 percent of the total volume, added and blended to produce a homogenous mixture prior to placement.
 
** NOTE TO SPECIFIER ** Edit the following paragraphs as required to suit loading conditions required for the project. Contact the manufacturer for additional requirements and recommendations. Coordinate requirements specified here with Section 32 10 00 - Bases, Ballasts, and Paving.
 
2.3
BASE COURSE
A.
Provide base course materials specified in Section 32 10 00 - Bases, Ballasts, and Paving to the depths specified.
 
** NOTE TO SPECIFIER ** Edit the following paragraphs as required to suit loading conditions required for the project. With engineered base a minimum of 2 inches (50 mm) of aggregate base should be placed below the GeoPave units as a drainage layer and an infiltration storage area. Greater depth may be required depending upon design rainfall needs and subbase permeability. With the aggregate/topsoil mix and a vegetative surface, infrequent/occasional passes are recommended that cause no lasting damage to the vegetation. Contact the manufacturer for additional requirements and recommendations.
 
B.
GeoPave Units:
1.
Heavy Fire Truck Access and H-20 Loading: Typical 110 psi (758 kPa) maximum tire pressure. Single axle loadings of 32 kip (145 kN), tandem axle loadings of 48 kip (220 kN). Gross vehicle loads of 80,000 lb (36.3 tons).
a.
Aggregate Base:
1)
CBR 2- 4, 6 inches (150 mm).
2)
CBR greater than 4, 6 inches (150 mm).
2.
Light Fire Truck Access and H-15 Loading: Typical 85 psi (586 kPa) maximum tire pressure. Single axle loadings of 24 kip (110 kN). Gross vehicle loads of 60,000 lb (27.2 tons).
a.
Aggregate Base:
1)
CBR 2- 4, 6 inches (150 mm).
2)
CBR greater than 4, 4 inches (100 mm).
3.
Utility & Delivery Truck Access and H-10 Loading: Typical 60 psi (414 kPa) maximum tire pressure. Single axle loadings of 16 kip (75 kN). Gross vehicle loads of 40,000 lb (18.1 tons).
a.
Aggregate Base:
1)
CBR 2- 4, 4 inches (100 mm).
2)
CBR greater than 4, 2 inches (50 mm).
b.
Engineered Aggregate/Topsoil:
1)
CBR 2- 4, 4 inches (100 mm).
2)
CBR greater than 4, 2 inches (50 mm).
4.
Cars & Pick-up Truck Access: Typical 45 psi (310 kPa) maximum tire pressure. Single axle loadings of 4 kip (18 kN). Gross vehicle loads of 8,000 lb (3.6 tons).
a.
Aggregate Base:
1)
CBR 2- 4, 2 inches (50 mm).
2)
CBR greater than 4, None.
b.
Engineered Aggregate/Topsoil:
1)
CBR 2- 4, 2 inches (50 mm).
2)
CBR greater than 4, None.
5.
Trail Use: Loading for pedestrian, wheelchair, equestrian, bicycle, motorcycle and ATV traffic.
a.
Aggregate Base:
1)
CBR 2- 4, None.
2)
CBR greater than 4, None.
b.
Engineered Aggregate/Topsoil:
1)
CBR 2- 4, None.
2)
CBR greater than 4, None.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Before beginning installation, verify site conditions are as indicated on the drawings. Notify the Architect if site conditions are not acceptable. Do not begin preparation or installation until unacceptable conditions have been corrected.
B.
Ensure that adjacent hard-surfaced paving work is completed before installing porous pavement system.
3.2
PREPARATION
A.
Subgrade:
 
** NOTE TO SPECIFIER ** Coordinate paragraphs below with earthwork provided by others. Proper subgrade preparation is required to enable the units to interlock properly and remain stationary after installation. Note that subgrade specified in Section 32 10 00 - Bases, Ballasts, and Paving should be compacted to 95 percent proctor density.
 
1.
Prepare subgrade as specified in Section 32 10 00 - Bases, Ballasts, and Paving. Verify subgrade in accordance with porous paving system manufacturer's instructions.
2.
Excavate area allowing for unit thickness and the engineered base depth (where required).
3.
Provide adequate drainage from excavated area if area has potential to collect water, when working with in-place soils that have poor permeability.
4.
Ensure in-place soil is relatively dry and free from standing water.
5.
Uniformly grade base.
6.
Level and clear base of large objects, such as rocks and pieces of wood.
B.
Base Preparation:
 
** NOTE TO SPECIFIER ** Coordinate paragraphs below with base installation provided by others. Delete subdrain paragraph if not applicable. The strength of the porous pavement system is determined, in part, by the support provided by the engineered base. Consult Presto Products for engineered base details and thickness recommendations.
 
1.
Install Base as specified in Section 32 10 00 - Bases, Ballasts, and Paving. Verify engineered base is installed in accordance with porous paving system manufacturer's instructions.
2.
Coordinate base installation and preparation with subdrains specified in Section 33 46 19.13 - Underslab Drainage Piping.
3.
If required, place a geotextile separation layer between the natural ground and the ' engineered base.
4.
Place base to the minimum thickness specified and or as indicated on the Drawings.
5.
Ensure aggregate portion of base is free from fines and has 30 percent or more void-space when compacted. Particle size should range in size from 0.375 to 1.0 inch (10 to 25 mm) with a D50 of 0.5 inch (13 mm).
 
** NOTE TO SPECIFIER ** Include the following two paragraphs for use with vegetated GeoPave systems only. Delete if not applicable. Proper engineered base materials will promote vegetative growth and provide required structural support. If the topsoil is not present within the engineered base, grass growth may be impaired. Note that vegetated surfaces are intended for infrequent or occasional traffic.
 
6.
Add and blend topsoil before placement equal to void percentage in aggregate.
7.
Pulverized topsoil portion shall equal plus or minus 33 percent of the total volume and be added and blended to produce a homogenous mixture prior to placement.
8.
Compact the mixture to a 95 percent proctor density.
3.3
INSTALLATION
A.
Install and infill units in accordance with porous paving system manufacturer's instructions.
B.
Installing Units:
1.
Place units with mesh bottom to ground.
2.
Lay units is the following pattern:
 
** NOTE TO SPECIFIER ** Select bond pattern required and delete paragraphs not required.
 
a.
Install unit pattern as indicated on the Drawings.
b.
Offset pattern for pedestrian access lane applications.
c.
Standard running bond bricklayer pattern for pedestrian and access lane applications.
d.
Herring bone pattern for large area with random traffic flow and placed with long direction perpendicular to traffic.
3.
Ensure final seam pattern has seams perpendicular to traffic flow straight and seams parallel to traffic flow staggered. Using half units where required for pattern by field cutting a full unit.
4.
Cut units with a hand or power saw to custom fit contours and around obstructions.
5.
Ensure required traffic load transfer and support.
 
** NOTE TO SPECIFIER ** Units must be fixed in place and protected during the installation process, if construction traffic causes movement of the units or large temperature changes occur. Note that plastic components have a relatively high rate of thermal expansion and joint separation could occur and rejoining of separated units may be required. Once a healthy turf is developed, the root system will provide the necessary anchoring of the system.
 
6.
Place first row of units against a stationary edge, when available.
7.
Secure adjoining Geopave units together using the U-CLIP connection device. Set U-CLIPS in place by hammer in the half-wall locations such that adjacent sections have horizontally level profiles. Provide U-CLIP with four on each unit long side and two on each unit short side.
 
** NOTE TO SPECIFIER ** Anchoring may be required when placing the Geopave units on a slope of 5-10 percent maximum. Stake length is generally 12 inches (305 mm) or longer depending on the slope, subgrade CBR and loading requirement. Delete paragraph if not required.
 
C.
Anchoring of Units:
1.
Place anchors in accordance with the manufacturer's recommendations.
2.
Anchor units in-place after installation of all the units within the defined area.
3.
Anchor units with 0.5 inch (13 mm) #4 rebar to prevent movement of the units.
4.
A Anchor length shall be [12.0 inches (305 mm) unless otherwise indicated.
5.
Drive the anchors through the GeoPave cell-wall vent holes either in the middle of the GeoPave units or along the perimeter as required.
 
** NOTE TO SPECIFIER ** Select the required infill system from the following paragraphs. If both systems are required indicate the location of each on the Drawings.
 
D.
Infilling Units - Aggregate Systems:
1.
Infill immediately after the units are installed to minimize movement of the units.
2.
Spread aggregate/topsoil engineered aggregate infill uniformly over the units with a skidsteer, small tractor or small loader.t
3.
Hand rake the aggregate to assure that the aggregate fill is at the top of the cell walls.
E.
Infilling Units - Vegetated Systems:
1.
Infill units with specified aggregate/topsoil engineered infill.
2.
Spread aggregate/topsoil engineered infill uniformly over the units to a level even with the top of the cell wall.
3.
If final vegetation is sod, under-fill the GeoPave units by 1.0 inches (25 mm) to allow room to seat or press sod into GeoPave units.
4.
Use spreading methods to prevent over-compaction of cell infill.
3.4
DELINEATION
A.
Delineate the installed GeoPave system with the following method:
1.
In-ground curbing.
2.
Above-ground curbing.
3.
Shrubbery or vegetation.
4.
Perimeter lighting.
5.
Delineation markers.
6.
____________________________.
 
** NOTE TO SPECIFIER ** Select the following paragraph for Vegetated Systems as required. Delete if not required.
 
3.5
SEED AND GRASSING
A.
Finish in accordance with manufacturer's instructions.
 
** NOTE TO SPECIFIER ** Select seeding or sod from the following paragraphs. Delete the paragraphs not required. Specify sod for areas where immediate use is desired. Young sod that is free from netting materials is recommended. Mature sod with a more developed root system and sod with netting may be difficult to press and cut into the cells.
 
B.
Seeding:
1.
Follow good seeding, fertilizing, and watering procedures for turf establishment based on regional practices.
2.
Increase watering frequency when free draining base materials are used.
3.
Seeding: As specified in Section 32 92 26.13 - Stolonizing.
C.
Sod:
1.
Sweep out topsoil to allow room to seat the sod.
2.
Install young sod free from netting materials.
3.
Press sod into partially emptied cells using a roller or other suitable equipment and follow normal watering procedures.
4.
Sod: As specified in Section 32 92 26.13 - Stolonizing.
 
** NOTE TO SPECIFIER ** Fertilize, water and cut regularly to encourage root growth and development.
 
3.6
MAINTENANCE
 
** NOTE TO SPECIFIER ** Select the following two paragraphs for Vegetated Systems only. Delete if not applicable. Normal turf care procedures should be followed, including de-thatching and aerating. Some equipment may slightly scar or cut the Geoblock wall structure during some operations, but will not affect overall structural integrity of the system. Coordinate with Section 32 92 26.13 - Stolonizing.
 
A.
For aggregate surfaces, maintain a 0.5 in (13 mm) surcharge of aggregate as a surface wear course. Surface should be inspected from time to time to identify signs of slight cell infill loss.
B.
Maintain grass in accordance with manufacturer's instructions and as specified in Section 32 92 26.13 - Stolonizing.
C.
Monitor pavement to ensure traffic frequency and loading does not exceed the pavement design.
D.
When snow removal is required, keep a metal edged plow blade from coming in contact with the surface during plowing operations to avoid causing damage to the units. Use a plow blade with a flexible rubber edge or with skids on the lower outside corners so the plow blade does not come in contact with the units.
END OF SECTION