Plantable Porous Paving System

SECTION 02795

PLANTABLE POROUS PAVING SYSTEM

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** NOTE TO SPECIFIER ** Soil Retention; plantable retaining wall block system products.
.
This section is based on the products of Soil Retention, which is located at:
2501 State St.
Carlsbad, CA 92008
Toll Free Tel: 800-346-7995
Email: request info ()
Web: www.soilretention.com
[ Click Here ] for additional information.
Soil Retention Products, Inc., Corporate Office: 2501 State Street, Carlsbad, CA 92008. Phone: 760-966-6090 and 800-346-7995, fax: 760-966-6099, website: www.soilretention.com ,.
Jan Jansson, Founder of Soil Retention, worked as a Superintendent and Assistant Project Manager for a major Swedish contractor for five years, then in 1969 started his own construction company in Sweden. In 1987, after moving to America with his family, Jan opened a franchise in Riverside County, California to manufacture and distribute plantable retaining wall blocks.
Jan soon recognized the need to build a more durable, versatile and better plantable retaining wall block that would more effectively meet the needs of various market segments. After extensive research and development, Jan and the development team at Soil Retention created a new block called Verdura, ("Verdant" for green and "Dura" for durable). Verdura® is a fully plantable retaining wall block system that can be used in many applications from small garden walls to large commercial structures.
This specification includes Drivable Grass®, a permeable, flexible and plantable concrete pavement system. This product is made of wet cast, low moisture absorption concrete. Drivable Grass® is cast with holes to allow for infiltration and root penetration. A cast-inside engineered polymer grid allows Drivable Grass® to flex and conform to irregular ground surface contours along pre-defined linear grooves, while providing the intended structural support needed for daily use. Drivable Grass® maintains its load supporting characteristics even when saturated. The design also eliminates sharp edges common in other products, and won't crack and break like rigid concrete or pop up like plastic.
Drivable Grass® offers a simple and reliable solution to storm water management through biofiltration, infiltration, and storage without losing valuable site area. With the use of Drivable Grass®, storm drains, hydrodynamic separators, filtration devices, and detention basins can be reduced or eliminated. Drivable Grass® also counts for required green space allowing for more usable land while reducing Heat Island Effect.

PART 1 GENERAL

1.1 SECTION INCLUDES

** NOTE TO SPECIFIER ** Delete items below not required for project.

A. Plantable Porous Paving System

1.2 RELATED SECTIONS

** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.

A. Section 02300 - Earthwork: Grading, subbase preparation and compaction.

B. Section 02620 - Subdrainage System.

C. Section 02700 - Pavements, Sidewalks, Curbing and Appurtenances.

D. Section 02800 - Site Improvements and Amenities.

E. Section 02810 - Irrigation System.

F. Section 02900 - Planting.

G. Section 02920 - Turf and Grasses.

H. Section 03300 - Cast in place concrete

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. ASTM C-33 Std. Spec. for Concrete Aggregates

B. CSA A23.1 M94 - Concrete Materials and Methods of Concrete Construction.

1.4 SUBMITTALS

A. Submit under provisions of Section 01300.

B. Product Data: Manufacturer's data sheets on each product to be used, including:

1. Preparation instructions and recommendations.

2. Storage and handling requirements and recommendations.

3. Installation methods.

C. Shop Drawings: Submit manufacturer's shop drawings including mat 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. Reduced Site Disturbance through creation of permeable surfaces and reduction of storm water detention facilities, resulting in less construction impact on an area basis and resulting in less potential particulate runoff and impact to the surrounding land and watercourses.

2. Storm water management through use of permeable surfaces that provide storm water infiltration and reduce storm water runoff.

3. Reduced Heat Island Effect through creation of a cooler surface.

4. Recycled Material Content through use of materials with recycled content to reduce impacts from extraction and processing of new virgin materials.

5. Regional Materials by using material within 500-mile radius of source, if applicable.

** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.

E. Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer's full range of available colors and patterns.

F. Verification Samples: For each finish product specified, two samples, minimum size 8 inches (203 mm) square, representing actual drivable grass mat unit. Also include:

1. Sieve analysis for grading of bedding sand and base material.

2. Source of compost material for bedding and seed cover.

3. Grass seed mix and sources.

G. Manufacturer's Certificates: Certify products meet or exceed specified requirements.

H. Closeout Submittals: Provide manufacturer's maintenance instructions that include recommendations for periodic maintenance vegetation and components.

1.5 QUALITY ASSURANCE

A. Manufacturer Qualifications: Manufacturer with a minimum for five years documented experience with the products specified

B. Installer Qualifications: An experienced installer who has successfully completed installations of pavers or other pavement systems on projects of similar or larger scope and magnitude.

C. Pre-Installation Meetings:

1. Convene a pre-installation meeting a minimum of two weeks prior to start of plantable porous paving system.

2. Verify project requirements, subbase and base conditions, manufacturer's installation instructions and coordination with other related work.

3. Require attendance of parties directly affecting work of this section, including the Contractor, Architect, engineer, and installer. Manufacturer's representative may attend by phone conference as needed. Review installation procedures and coordinate installation with other work around installation area.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Deliver materials to site in manufacturer's original palletized configuration with labels clearly identifying product style number, color, name and manufacturer.

B. Store materials in clean, dry area in accordance with manufacturer's instructions.

C. Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.

D. Protect all materials from damage in accordance with manufacturer's recommendations. Damaged materials shall not be incorporated into the work.

1.7 SEQUENCING

A. Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.

1.8 PROJECT CONDITIONS

A. Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

B. Verify completion of all adjacent hardscape, paving, and mow curbs/strips indicated on the Drawings prior to the installation of the Drivable Grass paving mats.

C. Gradients for Plantable Porous Paving System can vary from flat to 12 percent. For steeper conditions, consult with manufacturer.

D. Cold weather applications:

1. Coordinate maintenance contracts.

2. Snowplow equipment operators should be educated about the underlying surface prior to beginning snow removal. Snowplow equipment should be fitted with Teflon runners, which will help keep the snowplow blade from damaging the product.

3. For sites that will require the use of heavy-duty snowplowing machinery, install mow curb/strips prior to installation of Drivable Grass paving mats. Drivable Grass® should be depressed 1/2" below the top of the mow curb/strip to protect the product from the snowplow blade.

4. Do not use frozen materials or materials mixed or coated with ice or frost.

5. Do not build in freezing conditions.

6. Ensure proper drainage to avoid standing freezing water in contact with paving mats.

7. Do not use deicing agents that are known to damage concrete such as rock salt.

E. Protect partially completed paving against damage from other construction traffic when work is in progress and until grass root system has had time to mature after 2 mowings. Projects using aggregate infill instead of planting are drivable upon completing infill.

F. Protect drivable grass installation and adjacent areas during construction.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: Soil Retention, which is located at: 2501 State St.; Carlsbad, CA 92008; Toll Free Tel: 800-346-7995; Email: request info (); Web: www.soilretention.com

** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.

B. Substitutions: Not permitted.

C. Requests for substitutions will be considered in accordance with provisions of Section 01600.

** NOTE TO SPECIFIER ** Edit the following paragraphs as required and applicable to project requirements.

2.2 PLANTABLE POROUS PAVEMENT SYSTEM

A. Drivable Grass Mats:

1. Material:

a. Concrete: Compressive Strength at 28 days, 5000 psi.

b. Propriety Grid Reinforcement: Engineered Plastic..

c. Flexibility: Minimum radius of curvature, 12 inches.

2. Physical Properties:

a. .Nominal Dimensions in inches (l x w x h): 24 inches by 24 inches by 1.5 inches.

b. Gross Area of Each Mat: 4 SF

c. Weight of Each Mat: 45 lbs.

d. Plantable Area: 60 percent (100 percent for sod).

e. Mats per pallet: 60

f. Area Covered per Pallet: 240 SF

3. Color:

a. Buff/tan

b. Grey

c. Terra Cotta

d. Other colors available for special order

B. Filter Fabric: Appropriate filter fabric if required by engineer to separate subgrade and base for site specific conditions.

C. Base Aggregate: Crushed permeable base, crushed miscellaneous base (CMB), crushed aggregate base (CAB), crushed rock or similar structural material normally used as a base course for pavement systems and meeting the gradation and / or permeability requirements shown on the Drawings.

D. Bedding Course - Defined as the initial material directly beneath the Drivable Grass mats. For planted applications, a minimum thickness of 2 inches of a thorough mix of 75 percent sand and 25 percent granular compost shall be used. For non-planted applications, and .25 inch to 1 inch sand shall be used depending on size of aggregates exposed in base course. A uniform thickness of bedding between the base and the Drivable Grass is required.

1. Sand shall be clean, non-plastic, and free from deleterious or foreign matter. Sand shall be sharp and manufactured from crushed rock. Do not use limestone screenings stone dust. Particles shall conform to ASTM C 33 CSA A 23.1-M94 and the following grading requirements:

2. Sieve Size Percent Passing

3. 3/8 in. (9.5 mm) 100

4. No. 4 (4.75 mm) 95 to 100

5. No. 8 (2.36 mm) 85 to 100

6. No. 16 (1.18 mm) 50 to 85

7. No. 30 (0.600 mm) 25 to 60

8. No. 50 (0.300mm) 0 to 30

9. No. 100 (0.15mm) 2 to 10

E. Compost material is defined as finely ground, well screened composted products such as composted manures, mushroom compost or green-waste compost. Material should be able to mix well with sand, able to hold moisture, and provide nutrient.

F. Infill: Infill for planting applications shall be the same as the bedding course. Infill not intended to support vegetation is likely to consist of 3/8 inch minus crushed angular stone or decomposed granite.

G. Grass: Use approved seed, hydroseed mix, or sod as specified for site specific application.

H. Seed Cover: Use approved seed cover to retain moisture during germination of seed.

I. Fertilizer: A commercial "starter" fertilizer shall be used. Check with local grass supplier for recommendations.

PART 3 EXECUTION

3.1 EXAMINATION

A. Subgrade: Coordinate with subgrade preparation specified in Section 02700. Do not begin installation until subgrade has been properly prepared.

1. Provide vertical depth to accommodate structural section of base aggregate, bedding layer, and Drivable Grass mat thickness.

2. Excavate to the lines and grades shown on the Drawings.

3. Install any mow strips or curbs as specified.

4. Proof roll foundation area as directed to determine if remedial work is required.

5. Over excavation and replacement of unsuitable subgrade soils with approved compacted fill shall be as specified in Section 02700.

** NOTE TO SPECIFIER ** Include the following paragraph if irrigation system is required. Delete if not applicable.

6. Install irrigation system to the specified depth and location as required by the Drawings.

7. Verify the accuracy of layout and grading prior to placement of base material or fill soils. Verify that all sub-grades, base course aggregate conditions, and subdrains are as specified.

B. Notify Architect of unsatisfactory preparation before proceeding.

3.2 PREPARATION

A. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

3.3 INSTALLATION

A. Install in accordance with manufacturer's instructions.

B. Aggregate Base and Bedding Layer

1. Install and compact aggregate base as required by the Drawings. Recommended base surface should be plus or minus 3/8 inch over a 10 foot straight edge.

2. Install, level to a uniform thickness, and compact bedding course upon which permeable, flexible and plantable pavement system will be placed.

C. Drivable Grass Pavement System

1. Install permeable, flexible, and plantable pavement in accordance with the manufacturer's guidelines.

2. Install to the line, grades and locations required by the Drawings.

3. Install mats in one axial direction. Butt mats against each other leaving no significant gaps. Adjust mats as required to maintain good grid pattern alignment. For vehicular driving, a running bond pattern is recommended.