Biaxial Geogrids Trafficked Structure Applications 2012 Hanes Geo

Biaxial Geogrids Trafficked Structure Applications © 2012 Hanes Geo Components

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS Right technology … Desired results …

REALIZING GEOGRID BENEFITS Today’s Pathway § What geogrids provide how do they perform § Applications § Product characteristic identification § Characteristic testing § Manufacturing quality § Hanes product offerings § Hanes technical assistance offerings

Punched & Stretched Geogrids Tensile Modulus Stress Punched & Stretched Geogrid Woven Fabrics Non-Woven Fabrics Strain Compatibility Strain

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS It is widely accepted that geogrids reinforce roads by confining the fill

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS In plan view, the geogrid confinement, ‘C’, acts omniaxially within a circle of grid to resist shear forces, ‘S’, from the wheel load

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS Aggregate Confinement v Minimizes lateral aggregate movement v Improves apparent aggregate shear strength v Reduces pressure on the subgrade

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS © 2012 Hanes Geo Components © 2009 Tensar International Corporation The processes by which aggregate confinement is achieved within trafficked structures is identical for all biaxial geogrids, regardless of aperture shape. Both are planer, 2 dimensional products

REALIZING GEOGRID BENEFITS Today’s Pathway § What geogrids provide how do they perform § Applications § Product characteristic identification § Characteristic testing § Manufacturing quality § Hanes product offerings § Hanes technical assistance offerings

Biaxial Geogrid Applications Biaxial Geogrid • Subgrade Improvement • Building a firm, stable platform over soft soil • Base Course Reinforcement • Reinforcing the structural section over a firm and unyielding subgrade

Subgrade Improvement 1996 US Army Corps of Engineers • 41, 900 lb. Unreinfoced Gross Weight • 2, 000 Passes • 3 -inch Rut Depth for Failure Criteria Woven or Non-Woven Geotextile Geogrid

1996 Corps of Engineers Strength/Compaction Profile With Depth CBR = 80 CBR = 100 CBR = 0. 6

Base Course Reinforcement v Extend Pavement Life: lowering life-cycle costs v Reduce Base Coarse Thickness: for immediate savings v Combination of both optimizing road life and economy Desired benefits …

Base Course Reinforcement 1992 US Army Corps of Engineers Full Scale Testing on all commercially available geogrids • 30 kip wheel load applied • Subgrade CBR = 3 (R-Value = 5) • No. of passes for a 1” rut

1992 US Army Corps of Engineers Application of 30, 000 LB Wheel Load Installing Grid on the Subgrade

1992 US Army Corps of Engineers Several Grids Tested

COE Results TIF (Traffic Improvement Factor) = # of passes until failure (1” rut depth) versus unreinforced (control) section. 2” Asphalt Concrete 14” aggregate Base Subgrade CBR = 3 Not All Geogrids Perform The Same

University of Alaska • How do aggregate particules move • What resists that movement?

University of Alaska & COE Torsional Rigidity Modulus 20 kg-cm A Measure of the Resistance to: • In-plane Rotation • Fishhook Particle Movement Correlates to In-Ground Performance

REALIZING GEOGRID BENEFITS Today’s Pathway § What geogrids provide how do they perform § Applications § Product characteristic identification § Characteristic testing § Manufacturing quality § Hanes product offerings § Hanes technical assistance offerings

INFRASTRUCTURE REBUILDING – GEOGRID CONTRIBUTIONS Key Geogrid Characteristics 1. Tensile strength/modulus 2. Aperture shape rigidity 3. Aggregate-geogrid interaction 4. Durability

CHARACTERISTIC TESTING SUMMARY PROPERTY TEST SPECIFICATIONS 1 QA 2 Tensile Strength – Ultimate ASTM D 6637 -B Yes Tensile Load @ 2% strain ASTM D 6637 -B Yes Junction Strength GRI-GG 2 -05 Yes Aperture Stability U. S. COE (strict) Yes Rib & Note Edges (vertical) Visual Inspection Yes U. S. EPA 9090 A-120 day Yes No ASTM D 4355/D 6637 – 500 hrs Yes No ASTM D 5818/D 6637 Yes No Measurement Yes No Chemical Durability U. V. Durability Installation Damage Durability Aperture Open Area No Post-Consumer Recycled Materials Suggested for use in specifications 2 Possible use for project owner QA evaluations 1

CURRENT U. S. PERFORMANCE STANDARDS Terra. Grid RX Series Ø Rectangular aperture shape Ø Meet current U. S. performance standards set through laboratory research, field trials and 30 years of successful application successes. Type 1 Type 2

WORLDWIDE PERFORMANCE STANDARDS E’GRID Series Ø Square aperture shape Ø Meeting and setting worldwide performance standards developed through laboratory research, field trials and over 20 years of successful applications Ø True alternative to recently-introduced technology § Taller Ribs § Rib x-section designed to resist lateral loads § Vertical rib & node edges § No post-consumer recycled inclusions § > 80% open area E’GRID 1616 E’GRID 2020 E’GRID 3030

REALIZING GEOGRID BENEFITS Today’s Pathway § What geogrids provide how do they perform § Product characteristic identification § Characteristic testing § Manufacturing quality § Hanes product offerings § Hanes technical assistance offerings

HANES TECHNICAL ASSISTANCE Complimenting our world-class products … Ø BI-DESIGN interactive software § designed to assist engineers and contractors select appropriate geogrid products to solve soft subgrade problems, enhance pavement performance and save time and/or money. § incorporating state-of-practice design methodologies validated by nearly thirty years of worldwide performance history to give the user peace of mind.

HANES TECHNICAL ASSISTANCE Complimenting our world-class products … Ø BI-DESIGN modules § Quick Calc – in-field, observation input tool used to solve emergency soft-grade problems § Sub Save – uses geotechnical information to review geogrid confined aggregates that protect the subgrade from excess stress § Base RF – uses geotechnical info to reduce asphalt surfaces road construction costs, extend pavement life or optimize longevity and cost

HANES TECHNICAL ASSISTANCE Complimenting our world-class products … Ø BI-DESIGN modules § Estimator – Results from other modules feed into this tool to facilitate quick material and cost estimates as well as cost comparison amongst geogrid/aggregate combinations being considered. § Spec Plus - Includes comprehensive example hand calculations, simple “drop in” engineering specifications, detail drawings and installation guides.

HANES TECHNICAL ASSISTANCE Complimenting our world-class products … Ø BI-DESIGN interactive software Ø Full traceability from raw materials to delivered product Ø On-staff: 4 graduate civil engineers, 3 PEs, all seasoned in geosynthetic application technologies Ø Renowned expertise of New. Grids, Ltd.

KEY TAKE AWAY’S Desired benefits …

Biaxial Geogrids Trafficked Structure Applications hanesgeo. com or hgcgrid. com Team UP: Hanes Geo – BOSTD Geosynthetics – New. Grids, Ltd