Developing re use applications and improving the economic benefits of florida s waste materials
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Developing Re-Use Applications and Improving the Economic Benefits of Florida’s Waste Materials. By Paul J. Cosentino, Ph.D., P.E. Howell H. Heck, III, Ph.D., P.E. Background. Florida stockpiles large volumes of waste or recyclable materials Examples: Waste Glass RAP

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Developing Re-Use Applications and Improving the Economic Benefits of Florida’s Waste Materials

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Developing re use applications and improving the economic benefits of florida s waste materials

Developing Re-Use Applications and Improving the Economic Benefits of Florida’s Waste Materials

By

Paul J. Cosentino, Ph.D., P.E.

Howell H. Heck, III, Ph.D., P.E.


Background

Background

  • Florida stockpiles large volumes of waste or recyclable materials

    • Examples:

      • Waste Glass

      • RAP

      • Concrete Rubble and Dust

      • Waste-to-Energy Ash

    • Engineering characteristics of these materials may be improved by adding common fill


Background cont

Background (Cont.)

  • Proper re-use would produce savings for Florida’s construction and landfill industries

  • Florida’s construction boom has caused a large demand for quality fill

  • Engineering properties of RAP improved by adding sand

  • Blending is common practice and often economical


Objective

Objective

  • Evaluate Florida’s candidate waste materials and improve their engineering behavior by adding conventional fill to make them economically attractive


Approach

Approach

  • Two year project

  • Nine Tasks to Accomplish Objectives


Flow chart

Flow Chart

Identify Re-Usable Waste Streams

Identify Engineering Environmental and Economic Conditions

Reject

Sample Waste Materials

Accept

Dry Rodded Unit Weight Evaluation

Reject

g

Mix %

Accept

Fundamental Geotechnical Testing and Analysis of Blends

Reject

Consistency and Economic Impact

Reject

Accept

Landfill

Applications


Explanation of tasks

Explanation of Tasks

  • 1 – Identify Candidate Waste Materials

  • 2 – Sampling

  • 3 – Fundamental Geotechnical Testing

  • 4 – Analysis of Testing

  • 5 – Waste-Soil Mixing Program

  • 6 – Waste-Soil Geotechnical Testing

  • 7 – Analysis of Mixing Results

  • 8 – Economic Impact of Re-Usable Materials

  • 9 – Reporting, TAG Meetings & Specifications


Major tasks

Major Tasks

  • Year 1

    • Select candidate materials from facilities statewide

    • Perform fundamental geotechnical testing

    • Choose materials with minimal environmental concerns

      • RAP, waste glass and concrete rubble and dust

  • Year 2

    • Perform Mixing Analysis

    • Evaluate Economics

    • Complete specifications describing proper use


Proposed schedule

Proposed Schedule


Expected technical results

Expected Technical Results

  • Geotechnical engineering data base

  • Summary of economic impact for re-using these materials

  • Specifications


Anticipated benefits

Anticipated Benefits

  • Two end users groups will benefit:

    • Contractors who use soils and borrow materials in highway construction

    • Landfill operators at solid waste or construction and demolition landfills

  • Suitable fill is becoming costly. Providing more choices, will control costs and save money.

  • Re-use of waste materials diverts them from the waste stream, and reduces landfilling costs & increases landfill space.


Related work

Related Work

  • A significant database of information exists to expedite the proposed work

  • Waste products have engineering properties that fall short of those needed for re-use in highways

    • Waste-to-energy ash

    • Waste-glass

    • RAP


Follow up

Follow-up

  • FDOT has funded over a decade work in this area without concentrating on economics.

  • A $261,000 24-month proposal has been funded to continue work on RAP and RAP-soil mixes.

  • The funding request to the FCSHWM is considered a supplement to the FDOT work.


Year 1 budget

Year 1 Budget


Year 2 budget

Year 2 Budget


Technical awareness group peer reviewers

Technical Awareness Group & Peer Reviewers

  • David Horhota, Ph.D., P.E. State Geotechnical Materials Engineer, FDOT, [email protected]

  • John Shoucair Geotechnical Materials Engineer, FDOT, [email protected]

  • David Westcott, Technical Service Manager Florida Region, CEMEX Corp., [email protected]

  • Chris Brunais, Area Manager, APAC-Florida Melbourne Div. [email protected]

  • Suzanne Boroff FDEP [email protected]

  • Jim Langenbach, P.E. Senior Engineer, GeoSyntec Consultants, [email protected]


Summary

Summary

  • Waste Materials can be re-used in Highways

  • Economic Benefits to Construction Industry

  • Economic Benefits to the Solid Waste Industry

  • Environmental Benefits to the Public


Questions

Questions?


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