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SECTION 32 12 43
POROUS PAVEMENT SYSTEM
 
 
Copyright 2003 - 2014 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Presto Geosystems; Geoblock 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.
.
This section covers Presto Geosystems Geoblock Porous Pavement System. The system provides vehicular and pedestrian load support over grass areas while protecting grass from harmful effects of traffic. The major components of the complete system are the Geoblock unit, engineered base support soil where needed, selected topsoil, aggregate or other suitable and appropriate infill, and selected vegetation (where applicable). 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 pavement system.
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
SYSTEM DESCRIPTION
 
** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others or edit as required. Vehicles should be limited to vehicles with a maximum tire pressure of 90 psi.
 
A.
Provides vehicular and pedestrian load support over grass areas, while protecting grass from harmful effects of traffic.
B.
Major Components of the Complete System:
1.
Geoblock units.
2.
Engineered base support soil, if required.
3.
Selected topsoil.
4.
Selected vegetation.
 
** NOTE TO SPECIFIER ** Edit the following paragraph as required for project. Consult with manufacturer for additional information.
 
C.
Both the Geoblock unit and base support soil work together to support an imposed loading as follows:
1.
Support gross vehicular loads of ________ lbs (________kg) maximum.
2.
Support gross pedestrian loads of ________ lbs (________kg) maximum.
 
** NOTE TO SPECIFIER ** Delete the following paragraph below if vegetated units are not required.
 
D.
Both the Geoblock unit and topsoil contribute to vegetation support.
1.4
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 Geoblock 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.
1.5
QUALITY ASSURANCE
A.
Manufacturer ISO Certification: ISO Certification certifying manufacturer's quality management system for its Geoblock system is currently registered to ISO 9001:2000 quality standards.
B.
Manufacturer's Field Representative Qualifications: Experienced in the installation of the specified products.
 
** NOTE TO SPECIFIER ** Retain subparagraphs below if required to suit project. Delete if not required.
 
C.
Installer Qualifications: Experienced in performing work of this section who has specialized in installation of work similar to that required for this project.
D.
Preinstallation Meeting: Convene a meeting a minimum of two weeks prior to start of porous paving system. Verify project requirements, subbase conditions, manufacturer's installation instructions and coordination with other work. Require attendance of parties directly affecting work of this section, including the contractor, engineer, installer, and manufacturer's representative. Comply with Division 1 requirements.
1.6
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.
1.7
WARRANTY
A.
Warranty: Manufacturer's two 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.
 
** NOTE TO SPECIFIER ** Select the Geoblock or Geoblock 5150 as required for the project from the following paragraphs and delete the product not required.
 
2.2
GEOBLOCK UNITS
 
** NOTE TO SPECIFIER ** Geoblock provides pedestrian and vehicular load support up to H/HS-20 loading over grassed areas with appropriate engineered base of topsoil/aggregate mix.. Geoblock5150 is a more robust paver system, with a 2 inch cell depth and requiring less base.
 
A.
Geoblock:
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.
2.
Performance Properties:
a.
Unit Minimum Crush Strength (Empty) at 70 degrees F (21 degrees C): 420 psi (2,900 kPa).
b.
Unit Minimum Crush Strength (Sand-Filled) at 70 degrees F (21 degrees C): 6,980 psi (41,285 KPa).
c.
Flexural Modulus at 70 degrees F (21 degrees C): 35,000 psi (240,000 kPa).
d.
Minimum Deflection Without Breakage When Units Supported at 40 inches (0.50 m) Centers at 70 degrees F (21 degrees C): 1.0 inch (25 mm).
3.
Dimensions:
a.
Nominal Width by Length: 20 inches by 40 inches (0.50 m by 1.00 m).
b.
Nominal Depth: 1.2 inches (30 mm).
c.
Nominal Coverage Area: 5.38 square feet (0.50 m2).
d.
Cells per Unit: 128.
e.
Cell Size: 2.25 inches by 2.25 inches (57 mm by 47 mm).
f.
Top Open Area per Unit: 88 percent.
g.
Bottom Open Area per Unit: 56 percent.
h.
Interlocking Offset Tabs: 12 tabs per 40 inches (meter). Tab system on all edges of unit.
i.
Weight: Nominal weight per Unit: 4.7 pounds (2.1 kg).
j.
Maximum Unit End-to-End or Side-to-Side Warpage: 0.24 inch (6 mm).
4.
Runoff: Runoff Coefficient shall be 0.15 at 2.5 inches per hour.
B.
Geoblock 5150:
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.
2.
Performance Properties:
a.
Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 420 psi (2,900 kPa).
b.
Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 7,058 psi (48,734 KPa.
c.
Flexural Modulus at 70 degrees F (21 degrees C): 35,000 psi (240,000 kPa).
d.
Minimum Deflection without breakage when units supported at 40 inch (0.50 m) centers at 70 degrees F (21 degrees C): 1.0 inch (25 mm).
e.
Wall Compressive Strength (Simulated Tire Area Loaded): 420 psi (2,900 kPa) when tested using circular plate, 6.5 inches (165 mm) diameter, loaded to failure.
f.
Wall Compressive Strength (Full Geoblock Unit Loaded): 138,240 pound-force (615 kN) when tested using full single unit loaded to failure via flat plate.
g.
Equivalent Elastic Stiffness: 48,000 pound-square inches (140 N-m2) when tested using simply supported Geoblock unit loaded to 1 inch (25 mm) deflection.
h.
Joint Shear Strength: 20,000 pound-force (89.0 kN) when tested using direct shear of tabular connection using special apparatus.
3.
Dimensions:
a.
Nominal Width by Length: 20 inches by 40 inches (0.5 m by 1.0 m).
b.
Nominal Depth: 2 inches (50 mm).
c.
Nominal Coverage Area: 5.38 square feet (0.5 m2).
d.
Cells per Unit: 72.
e.
Cell Size: 3.1 inches by 3.2 inches (79 mm by 81 mm).
f.
Top Open Area per Unit: 87 percent.
g.
Bottom Open Area per Unit: 41 percent.
h.
Interlocking Offset Tabs: 12 tabs per 40 inches (meter). Tab system on all edges of unit.
i.
Weight: Nominal weight per Unit: 9.0 pounds (4.0 kg).
j.
Maximum Unit End-to-End or Side-to-Side Warpage: 0.24 inch (6 mm).
4.
Runoff: Runoff Coefficient shall be 0.15 at 2.5 inches per hour.
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.
3.2
PREPARATION
A.
Subgrade: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. The strength of the porous pavement system is determined, in part, by the support provided by the engineered base. Consult Presto Geosystems for engineered base details and thickness recommendations. 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.
 
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 engineered base to the thickness recommended in Presto Geosystems Design and Construction Overview. The base thickness is dependent upon the sub grade CBR and wheel loading.
5.
Place engineered base of clear stone or crushed rock, homogenously blended with topsoil.
6.
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 (9.5 to 25 mm).
7.
Add and blend topsoil before placement equal to void percentage in aggregate.
8.
Pulverized topsoil portion shall equal plus or minus 25 percent of the total volume and be added and blended to produce a homogenous mixture prior to placement.
9.
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:
 
** NOTE TO SPECIFIER ** Edit the following paragraphs as required for paving pattern.
 
1.
Place units with square hole to ground.
2.
Place units with long direction of unit perpendicular to direction of traffic. 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. 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.
Standard running bond bricklayer pattern for access lane applications.
c.
Herring bone pattern for large area with random traffic flow.
3.
Cut units with a hand or power saw to custom fit contours and around obstructions.
4.
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 tthe necessary anchoring of the system.
 
5.
Place first row of units against a stationary edge, when available.
6.
Slide units together so interlocking tab joint is fully engaged. Units should not protrude above desired surface elevation.
7.
Prevent units from shifting during installation as follows:
a.
Temporary wood stakes or permanent metal stakes through holes in units.
b.
Thread-forming tapping screws through perimeter interlocking tabs.
 
** NOTE TO SPECIFIER ** Anchoring may be required when placing the Geoblock 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.
Anchor units in-place after installation of all the units within the defined area.
2.
Anchor Geoblock units with 0.5 inch (13 mm) #4 rebar to prevent movement of the units.
3.
Anchor length shall be _____ inches (______ mm).
4.
Drive anchors through holes in the Geoblock units 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 - Vegetated Systems:
1.
Infill units with suitable topsoil immediately after units are installed to minimize potential for joint separation.
2.
Spread topsoil infill uniformly over the units to a level even with the top of the cell wall.
3.
Use spreading methods to prevent over-compaction of cell infill.
4.
Topsoil: As specified in Section 32 92 26.13 - Stolonizing.
E.
Infilling Units - No Infill:
1.
If the Geoblock units are to remain unfilled, add expansion joints as required for the application.
3.4
DELINEATION
 
** NOTE TO SPECIFIER** With vegetated systems, once healthy turf has been established, the Geoblock cell wall structure will have minimal visibility when good turf-maintenance practices are followed. Delineation may be desirable to create greater visibility for those using the access lanes.
 
A.
Delineate the installed Geoblock system with the following method:
1.
In-ground curbing.
2.
Above-ground curbing.
3.
Shrubbery or vegetation.
4.
Perimeter lighting.
5.
Delineation markers.
6.
____________________________.
3.5
SEED AND GRASSING
A.
Finish in accordance with manufacturer's instructions.
 
** NOTE TO SPECIFIER ** Select seeding or sodding 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.
Sodding:
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.
Sodding: 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 ** 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.
Maintain grass in accordance with manufacturer's instructions and as specified in Section 32 92 26.13 - Stolonizing.
B.
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.
C.
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 Geoblock units.
END OF SECTION