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  • 1

    Presented by:

    Interlocking Concrete Pavement Institute

    The Low Impact Development Center, Inc.

    North Carolina State University

    Permeable Interlocking Concrete

    Pavement (PICP)

    A Low Impact Development Tool

    Training for Schools and Universities

    This program is registered with the AIA/CES and ASLA CPE for

    continuing education professional education. As such, it

    does not include content that may be deemed or construed

    to be an approval or endorsement by the AIA or ASLA of

    Any material of construction or any method or manner of

    handling, using, distributing, or dealing in any material or product.

    Questions related to specific materials, methods, and services will

    be addressed at the conclusion of this presentation.

    Dec. 19, 2008 Program 000011

    Permeable Interlocking

    Concrete Pavement

    A Low Impact Development Tool

  • 2

    Learning objectives:

    - Identify PICP Components

    - Understand integrated

    environmental benefits of

    PICP

    - - Understand contribution of

    LEED points from PICP

    - Understand basic design &

    maintenance requirements

    of PICPs

    What is PICP?

    PICP Costs

    PICP Benefits

    Low Impact Development (LID)

    Designing PICP Systems

    Construction

    Maintenance

    Teaching and Research Opportunities

    PICP Resources

    Content

  • 3

    A solid interlocking paver system water drains

    through permeable joint material

    Strong & durable paving system well-suited for low

    traffic areas: parking lots, parking bays & low-speed

    streets

    What is PICP?

    What is PICP? Concrete Pavers

    Open-graded

    Subbase

    Reservoir

    Uncompacted

    Subgrade Soil

    Open-graded

    Base Reservoir

    Underdrain

    (As required)

    Optional Geotextile

    Under the Subbase

    Permeable Joint Material

    Open-graded

    Bedding Course

    System

    Components

  • 4

    Paver Types: Interlocking Shapes/Patterns

    What is PICP?

    Recent regulations encourage managing runoff at the source

    PICP reduces or eliminates need for detention ponds & storm sewer pipes

    PICP reduces runoff, pollutants; recharges groundwater & helps reduce downstream erosion & flooding

    Cost-effective site use: pedestrian & vehicular pavements combined with detention areas

    Why use PICP?

  • 5

    PICP Hydrology Example

    Assumptions:

    Paver Thickness: 3 in. (8 cm)

    Bedding Layer: 2 in. (5 cm)

    Base Layer: 8 in. (20 cm)

    Total Area: 15,000-20,000 ft (1,500 to 2,500 m)

    Prevailing Wages

    Does NOT include design, concrete curbs, excavation, and pipe costs

    $ 7-12/sf

    PICP System Cost Example

  • 6

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Stormwater and

    CampusesSustainable

    Practices & LEED

    PICP Benefits

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Stormwater and

    CampusesSustainable

    Practices & LEED

    PICP Benefits

  • 7

    Sustainability Tool

    Manage campus stormwater sustainably

    Cleans and infiltrates stormwater at the

    source

    Teaching Tool

    Opportunity for faculty research

    Opportunity to train students to use this

    technology

    PICP BenefitsStormwater and Campuses

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Sustainable

    Practices & LEED

    PICP Benefits

    Stormwater and

    Campuses

  • 8

    LEED Gold Project

    Peak flow & pollution reduction,

    University of Victoria, BC

    Engineering & Computer Sciences

    Building

    PICP BenefitsInfrastructure Cost Savings

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Sustainable

    Practices & LEED

    PICP Benefits

    Stormwater and

    Campuses

  • 9

    Water Quality and Quantity Issues

    Don River (Toronto) at Bloor Street May 12, 2000

    Rapidly developing areas hydrology is being radically changed

    25% of developed areas are impervious

    Campus programs provide the training for the problem solvers of the future: Stormwater is key issue

    PICP BenefitsStormwater Regulations

    PICP BenefitsStormwater Regulations

    Water Quantity

    Reduces volumes & peak flows via infiltration

    Imitates predevelopment conditions: no runoff from common storms

    Reduces or eliminates retention/detention facilities & conserves

    land

    Reduces stormwater utility fees

    Water Quality

    Reduced downstream erosion, preserves drainage system

    Filters & reduces nutrients, metals

    Recharges groundwater

    Helps maintain dry-weather stream flows

    Filters oil drippings

    Reduces runoff temperatures

  • 10

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Sustainable

    Practices & LEED

    PICP Benefits

    Stormwater and

    Campuses

    PICP BenefitsInspection Training Available

  • 11

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Sustainable

    Practices & LEED

    PICP Benefits

    Stormwater and

    Campuses

    Example Teaching Opportunities

    Campus real life laboratory in paved surface areas

    Lab opportunities for analysis of water samples

    Train students how to design hydrologically functional pavements

    Integrated visual and functional design

    Problem-solving for multiple objectives

    PICP Benefits

  • 12

    Research Examples at Universities: Data analysis, pavement performance comparisons

    Research & Site Design

    Modeling Design

    Technical Reports

    TRCA

    Bill Hunt, Kinston, NC

    Student labs

    PICP BenefitsResearch

    TRCA

    Ongoing Research Needs

    Volume reductions

    Water quality improvements

    Reflectivity (albedo) cool surface quantification

    Winter performance; deicing salt use

    Maintenance protocols

    New applications (e.g. coatings for AQ benefits)

    Comparison studies to other pavements

    Benefits to trees & other vegetation

    Life cycle assessment for impacts & benefits

    Life-cycle cost analyses

    PICP Benefits

  • 13

    Sustainable Design Research Topics for many disciplines

    LINKHUB

    Planning, Landscape Architecture, Biological Engineering,

    Horticulture, Environmental Engineering, Civil Engineering,

    Urban Foresters, Ecologists, Architecture..

    Campus Green Infrastructure is enhanced by LID tools such as PICP

    PICP BenefitsResearch

    Pier A Park

    Hoboken, NJ, 1998Image courtesy of Bruce K. Ferguson

    Research Topic:

    Structural Soil Supports PICP and Tree Growth

    Collaboration of soil scientists, engineers, landscape architects,

    urban foresters and/or urban designers

    PICP BenefitsResearch

  • 14

    Inspection Training

    Available

    Durable ADA

    Compliant Surface

    Local Stormwater

    Regulations

    Research

    Infrastructure

    Cost Savings

    Sustainable

    Practices & LEED

    PICP Benefits

    Stormwater and

    Campuses

    Dominican UniversityRiver Forest, IL

    165,000 ft PICP

    Sustainable Design & Stormwater Management Research

    Elmhurst College, IL

    125 space parking lot with

    underground cisterns,

    detention areas under

    pavement linked to

    bioretention areas.

    Effectiveness monitored by

    science faculty, chemistry &

    biology students.

    LEED Gold Project

    Seneca College

    King City, Ontario

    Multiple paving

    types evaluated.

    PICP BenefitsSustainable Practices & LEED

  • 15

    Decrease pollution through sustainable sites (SS)

    Increase building water use efficiency (WE)

    Reduce energy and atmospheric pollutants (MR)

    Conserve materials and resources (MR)

    Improve indoor air quality (EQ)

    Offer innovative ideas and designs (ID)

    PICP contributes to LEED Credits

    PICP BenefitsSustainable Practices & LEED

    LEED

    Credit Points

    6.1 Reduction of stormwater rate and quantity 1

    6.2 Treatment of stormwater runoff 1

    7.1 Increase albedo (reflection of solar radiation)

    (non-roof surfaces) 1

    7.2 Increase albedo (segmental paver on roof surface ) 1

    Decrease Pollution Through Sustainable Sites (SS)

    PICP BenefitsSustainable Practices & LEED

  • 16

    Credits - 1 LEED point each:

    3.1 5% reused content

    (i.e. crushed concrete)

    3.2 10% reused content

    4.1 5% recycled waste content

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