Acquired Tenax Geocomposite product line in 2009 Manufacturer of - - PowerPoint PPT Presentation

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Acquired Tenax Geocomposite product line in 2009 Manufacturer of - - PowerPoint PPT Presentation

Nov 24, 2022 138 likes •653 views

Based in Baltimore Maryland Acquired Tenax Geocomposite product line in 2009 Manufacturer of extruded Civil and Environmental geosynthetics Geosynthetic Engineering and Technical assistance Secured USA based production

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  • Based in Baltimore Maryland
  • Acquired Tenax Geocomposite product line in 2009
  • Manufacturer of extruded Civil and Environmental geosynthetics
  • Geosynthetic Engineering and Technical assistance
  • Secured USA based production for Punched & Drawn Geogrids
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TENDRAIN TENDRAIN II ROADRAIN TENFLOW TENSEAL UBXC SCOURSHIELD ROCK IN ROLL

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TENDRAIN TENDRAIN II

High load and high flow geocomposites for landfill expansions

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TENDRAIN TENDRAIN II

Drainage under concrete slopes for impoundments

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Synthetic subsurface drainage layer for pavement systems

ROADRAIN

Geotextile filter removed to show triplanar core

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ROADRAIN

RoaDrain can be used in multiple ways to improve pavements

Geotextile filter removed to show triplanar core

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ROCK IN ROLL

Grave replacement layer for concrete slabs

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Biofilter Media Media Screen (Tendrain BF) Concrete Curbs* Curb Supports* Sand Bottom* Concrete Tank Bottom* Air Plenum

* Alternative systems use large,

  • pen graded stone and

perforated PVC pipes for air

  • distribution. Tendrain BF is

suitable for all applications.

Inlet Air Plenu m Media Screen (Tendrain BF) Curb Supports*

TENDRAIN BF

Odor control biofilter media screen Tendrain BF

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High flow drainage geocomposites

TENFLOW TENSEAL

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Innovative products for combined drainage and waterproofing

TENSEAL

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The flexible solution to scour protection

SCOURSHIELD

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SBX GEOGRIDS UX SERIES GEOGRID

October 11, 2011 Syntec announced the launch of

  • ur own line of punched and drawn geogrids

manufactured in the USA: SBX biaxial geogrids & UX Series uniaxial geogrids

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Uniaxial geogrids for mechanically stabilized earth structures

UX SERIES

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SBX GEOGRIDS

Subgrade stabilization

(CBR <4)

Base Reinforcement

(CBR >4)

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  • Primary reinforcement

mechanism found in geotextiles

  • Thought to be the primary

reinforcement mechanism for geogrids prior to extensive research

  • Considered now to be minimal in

relation to lateral restraint mechanism, particularly in subgrade improvement

Source: USACOE ETL 1110-1-189

Geogrid Reinforcement Mechanisms:

1) Tensile Membrane Effect 2) Improved Bearing Capacity 3) Lateral Restraint

Vertical Membrane Support Membrane Tension

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Geogrid Reinforcement Mechanisms:

1) Tensile Membrane Effect 2) Improved Bearing Capacity 3) Lateral Restraint

  • Shifting failure envelope from the

weak subgrade to the stronger base material

  • Results in enhanced bearing

capacity of the subgrade without soil treatment or undercutting

Source: USACOE ETL 1110-1-189 Unreinforced Shear Surface Reinforced Shear Surface

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  • Confinement of the aggregate base

during loading

  • Results in increased modulus of the

base material (Residual Stress)

  • Improved/reduced vertical stress

distribution applied to pavement subgrade

Lateral Shear Flow Lateral Restraint Due to Friction Source: USACOE ETL 1110-1-189

Geogrid Reinforcement Mechanisms:

1) Tensile Membrane Effect 2) Improved Bearing Capacity 3) Lateral Restraint

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  • Lateral Restraint

SBX Biaxial Geogrids: Base Reinforcement vs. Subgrade Improvement

Soft Subgrade (CBR < 4.0) Firm Subgrade (CBR > 4.0)

  • Improved Bearing Capacity
  • Tensile Membrane Effect
  • Lateral Restraint

Base Reinforcement Subgrade Improvement

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SBX Biaxial Geogrids: Base Reinforcement vs. Subgrade Improvement

Soft Subgrade (CBR < 4.0)

Facilitate construction over soft soils (CBR <4)

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Firm Subgrade (CBR > 4.0)

Base Reinforcement

SBX Biaxial Geogrids: Base Reinforcement vs. Subgrade Improvement

Reduce cost by major component (aggregate base) reduction.

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  • Life Cycle Cost Savings

– Service Life Extension

  • Reduced Initial Cost
  • Pavement Component

Reduction

SBX Biaxial Geogrids: Base Reinforcement

50,000 ESALs 100,000 ESALs 50,000 ESALs 50,000 ESALs

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Kennephol et al (1985) Cancelli et al (1996) Al-Qadi et al (1998) Miura et al (1990) Perkins (1998 - ) Ruddock et al (1982) Halliday & Potter (1984) Milligan et al (1986) Delmas et al (1986) Chaddock (1988) Anderson & Killeavy (1989) Yarger et al (1991) Webster (1991) Webster (1992) Dawson et al (1994) Freeman & Ahlrich (1996) Austin & Knapton (1996) Brandon et al (1996) Huntington & Ksaibati (1999) Morvant & Holm (1999) Pavement Management Services (2000) Beland & Konrad (2002) Tingle & Webster (2003) Brown et al (1982) Barker (1987) Barksdale et al (1989) Collin et al (1996) Moghaddas et al (1996) Watts et al (2004) Perkins (2004) Gourc et al (1983) U of Waterloo (1984) Milligan et al (1986) Haas et al (1988) Alenowicz et al (1996) Beretta et al (1994) Abdulijauwal et al (1994) Palmeira & Ferreira (1994) Ho (1996) Collin et al (1996) Gabr 2001

Composite Full scale Moving wheels Plate loading

Punched & Drawn PP Biaxial Geogrids:

Almost 3 decades of research to: 1) Identify key properties 2) Quantify contribution

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  • “We have attempted to

capture the physical properties a geogrid must possess in order to enhance flexible pavement performance.”

  • Aperture Stability index

property developed

Ribs Thickness Thicker is better Stiffness High stiffness is better Shape Rectangular is better Aperture Size Depends on fill used Shape Round or square is better Stiffness High stiffness is better Joint Strength High compared to ribs (>90%) Overall Torsional Stiffness High is better Stability Very high Source: USACOE Webster, 1992

Punched & Drawn PP Biaxial Geogrids:

Almost 3 decades of research to: 1) Identify key properties 2) Quantify contribution

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Tensar Standard Geogrid Patent Expires May 30, 2012 ! Punched & Drawn PP Biaxial Geogrids:

Patented in the USA since 1995

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Punched & Drawn PP Biaxial Geogrids:

Patented in the USA since 1995, Patent expires May 30th 2012

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Punched & Drawn Geogrids: Biaxial vs. Triaxial

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1) Almost 3 decades of successful Design, Installations and Proven Performance worldwide and in the USA. 2) Approved by FHWA and AASHTO. 3) Often the preferred geogrid by, USACE, State DOT’s, Counties, Municipalities and Private Enterprise. (Walmart) 4) Due to the patent they are often specified without equal. Geogrids demonstrating similar strength are often rejected because due to a single property. 5) What was once the Gold Standard is now claimed obsolete by the maker?

Punched & Drawn Geogrids: Biaxial vs. Triaxial

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Punched & Drawn Geogrids: Biaxial vs. Triaxial

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Tensar BX1200 (Biaxial geogrid)

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Tensar TX160 (Triaxial geogrid)

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Manufacturer provided no tensile data for TriAx in 2010 or 2011 Geosynthetics Specifier’s Guides

Punched & Drawn Geogrids: Biaxial vs. Triaxial

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ASTM D4439 Standard terminology for geosynthetics ASTM D6637 Standard test method of geogrid tensile properties

WHAT IS RADIAL STIFFNESS?

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WHAT IS RADIAL STIFFNESS?

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ASTM D6637 does not define radial stiffness or taking of samples in any other direction than MD or TD.

WHAT IS RADIAL STIFFNESS?

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WHAT IS RADIAL STIFFNESS?

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PER ASTM D 6637 LOAD @ 2% STRAIN LOAD @ 5% STRAIN LOAD @ PEAK kN/m Lbs/ft kN/m Lbs/ft kN/m lbs/ft TriAx 140 TD 3.95 270 8.99 616 14.73 1,009 BX1100 (Type 1) TD 6.6 450 13.4 920 19 1,300 MD 4.1 280 8.5 580 12.4 850 TriAx 160 TD 4.6 314 10.64 726 18.924 1,291 BX1200 (Type 2) TD 8.6 590 19.6 1,343 28.8 1,970 MD 6 410 11.8 810 19.2 1,310

Punched & Drawn Geogrids: Biaxial vs. Triaxial

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TRIAXIAL GEOGRID STUDIES: LOUISIANNA TRANSPORTATION RESEARCH CENTER

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TRIAXIAL GEOGRID STUDIES: LOUISIANNA TRASPORTATION RESEARCH CENTER

Research funded in part by Tensar 2 Geogrids Tested (tensile modulus) GG1 = 450 kN/m @ 2% (BX1200) GG2 = 475 kN/m @ 2% (TriAx 170) Currently Available (tensile modulus) TriAX 140 = 198 kN/m @ 2% TriAX 160 = 230 kN/m @ 2% From the report: “…the triaxial geogrid GG2 performed a little better than the biaxial geogrid GG1. However, the difference is considered insignificant and lies within the test variations.”

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TRIAXIAL GEOGRID STUDIES: The Confinement Effect of Different Geogrids

Discussion of the results: “…there does not seem to be any significant difference in performance between square and triangular shaped apertures.” “…. confinement load at 2% strain should be adopted…”

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TRIAXIAL GEOGRID STUDIES: Western Transportation Institute

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TRIAXIAL GEOGRID STUDIES: Western Transportation Institute

Progress Report #2

  • July 1, 2008 – Sep 30, 2008
  • 13 Sections Constructed
  • 13 Sections Tested
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TRIAXIAL GEOGRID STUDIES: Western Transportation Institute

Project Summary Report

  • August 2009
  • Only 12 Sections
  • TriAx Section Stricken! Why?
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Punched & Drawn Geogrids: Biaxial vs. Triaxial

1) Many designers still desire the proven BX geogrids 2) Many BX specifications still remain in use, Tensar is

  • ften able to switch to Triax

3) A few designers simply want Tensar geogrids 4) Syntec SBX geogrids are direct replacements to Tensar BX geogrids

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SYNTEC SBX vs. TENSAR BX

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SYNTEC SBX vs. TENSAR BX Streamlining the DOT approval process, when needed.

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www.synteccorp.com

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