Strata Global

High strength geogrids

What does high-strength geogrids mean?

High-strength geogrids are vital components of most contemporary construction work, especially in the projects that require reinforced soil or stability under load across structures like roadways, retaining walls, and embankments. These grids are specialized materials used to enhance the application of several civil engineering structures including roadways, retaining walls, and embankments.

At Strata Global, we fabricate our geogrids with the use of high tenacity polyester (PET) yarns. This core product provides the main source of strength. These yarns are also coated with a polyethylene tube of extra wide roll widths which tends to resist moisture, chemicals and ultraviolet rays.

What makes high-strength geogrids special?

It’s not only the substance but a cluster of crucial characteristics which makes the high geometric geogrids distinctive from the normal geogrids. These characteristics make it possible for them to support extreme loads without losing their flexibility and durability over time.

  • Ultimate tensile strength: Tensile strength denotes the degree of force applied to a geogrid at the point of rupture. High tensile strength is an advantage in soil reinforcement through effective load distribution over a large radius without causing stretch or tearing.
  • Aperture size: The grid structure itself, with uniform openings or apertures, allows soil to interlock with the geogrid. This interlocking provides stability and enhances the load-bearing capacity of the ground.
  • Junction efficiency: The junctions of a geogrid, which usually connects the ribs of the grid, are very important. Improvements in junction efficiency lead to improvements in the load spreading across the geogrid and shear strength.
  • Radial stiffness : Radial stiffness is important when it comes to controlling deformation. It indicates how well the geogrid can retain its shape in the application of forces.
  • Elastic modulus: A higher elastic modulus implies that the geogrid can deform and return back to its original form and cannot permanently deform during applied tension.
  • Long-term design strength: The long-term design strength is the property of geogrids that minimizes the degradation of performance after years of load bearing.
  • Rib strength: The ribs of a geogrid are the transverse and longitudinal bands that are interconnected to form the grid structure. The more robust the ribs, the higher the load they can hold without any permanent distortion.
  • Load distribution: Geogrids serve a primary purpose of load distribution across a large area. This minimizes the risk of latent stress points hence soil erosion control or soil collapse.
  • Creep resistance: High-strength geogrids are developed in such a way as to eliminate creep, making sure that the normal operation indicators are not affected for prolonged periods, even with a constant operating stress.
  • Chemical and UV resistance: High-strength geogrids are exposed to different chemicals and especially to UV radiation in external applications.
  • Flexibility and rigidity balance: For any geogrid to be of good use, there must be an equilibrium between flexibility and stiffness. If it’s too stiff, then it can easily break when stressed. Our high-strength geogrids have been manufactured to achieve this important aspect.

Types of geogrids

There are two main types of geogrids, each suited for different applications.

Uniaxial geogrids (StrataGrid™)

These are designed to be strong in one direction. Uniaxial geogrids are ideal for retaining walls, where they provide excellent reinforcement and stability

StrataGrid uniaxial geogrids by Strata Global
StrataGrid uniaxial geogrids by Strata Global

Biaxial geogrids (SGB)

Biaxial geogrids offer strength in both the vertical and horizontal directions. These are commonly used in applications like roadways and embankments, where stability is needed in more than one direction.

StrataGrid Biaxial (SGB) geogrids
StrataGrid Biaxial (SGB) geogrids

Testing and standards for high-strength geogrids

To make sure a geogrid truly qualifies as high strength , some standards and normative documents are required. For instance, there are standards developed by several organizations, including ASTM, which clearly outline the parameters that make geogrids high-strength.

Most widely performed tests include tensile tests in which geogrids are pulled apart to breakage  to determine the tensile strength of the specimen. In pull-out tests, the resistance to geogrids dislodging from the ground is measured, which is particularly important in applications such as retaining walls.

Furthermore, laboratory certifications are issued for geogrids ensuring that these are within the specified properties before field application.

In the field of civil engineering, high strength geogrids offer effective alternatives for soil stabilization and load dispersion. Selecting the appropriate geogrid type such as uniaxial for retaining walls or biaxial for pavement applications is key to enhancing the performance and durability of any project. At Strata Global, our primary focus and priorities are geogrids of this kind, customized for every possible engineering problem.

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Harold W. Hill, Jr

Director, President – Glen Raven Technical Fabrics

Strata/Glen Raven tenure: 10 years/28 years
Total industry experience: 35 years


MBA – Wake Forest University

 

Directs the strategic direction of Glen Raven’s automotive, protective apparel, military, geogrid, outdoor and logistic businesses.

J. Craig Bell

Director, General Manager, Strata Inc.

Strata/Strata Inc. tenure: 3 years/14 years
Total industry experience: 25 years


MBA – Georgia State University

 

Led the integration of Strata Inc. business operations into the headquarters of GRTF and transition from USA based to India based manufacturing.

Ashok Bhawnani

Director

Strata tenure: 17 years
Total industry experience: 47 years

CA – ICA

 

Played a key role in the establishment of Strata’s India operations. Provides vision for product innovation and leveraging new technology trends.

Phil McGoldrick

Global Technical Sales Director

Strata tenure: 7 years
Total industry experience: 32 years


Civil & Geotechnical Engineer (First class)


Provides highly technical and innovative civil engineering solutions in India and around the world. Responsible for the design and execution of large-scale geotechnical projects around the world including Australia, Asia, Europe, Africa, Middle East, and South America.

Shahrokh Bagli

CTO – Chief Technology Officer

Strata tenure: 9 years
Total industry experience: 48 years


BTech (Hons), MTech (Civil) Both IIT Bombay, DMS (Bombay University), FIE, FIGS, Chartered Engineer

 

Streamlines the designs of Geosynthetics and has brought innovation in geogrid and geocell design application.

Mujib Katrawala

COO – Projects and Sales

Strata tenure: 13 years
Total industry experience: 24 years


MBA – University of Gujarat

 

Leads the monetization of products and solutions while ensuring highest execution quality and project profitability.

Chandrashekhar Kanade

COO – Technical Textiles

Strata tenure: 13 years
Total industry experience: 33 years


BE (Mechanical) – Nagpur University

 

Drives excellence in process design, product features and cost effectiveness in production.

Govind Keswani

CFO – Chief Financial Officer

Strata tenure: 8 years
Total industry experience: 35 years


CA – ICA, ICWA – ICWAI

 

Leads the finance, accounting, taxation, commercial, legal and IT functions and assisting on all strategic and operational matters.

Gautam Dalmia

CDO – Chief Development Officer

Strata tenure: 10 years
Total industry experience: 13 years


MBA – ISB, Hyderabad

 

Leads diversification of the product portfolio, monetizing the new products and ensuring successful sustained financial growth of the company top line.

Narendra Dalmia

CEO – Chief Executive Officer

Strata tenure: 14 years
Total industry experience: 42 years


B Tech (Chemical) – IIT Delhi

 

Leads day-to-day business operations of the company with focus on capacity expansion, product and process improvement.

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