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Geogrid Reinforced Flexible Pavement Design

ABG can offer a geogrid-stabilised, reduced road foundation thickness for weak subgrade conditions, utilising the benefits of geosynthetics to improve the layer stiffness / drainage quality within the AASHTO pavement design approach. This increases the lifespan and / or reduces the thickness of the overall pavement. We can apply one, or a combination of geogrids, geocomposites and geotextiles to benefit our clients in the design of flexible road foundations. Please contact ABG to discuss your project specific design requirements.

Project name

Project description

Contact name

Company

Telephone

Region

Sector

Subgrade soil

CBR [%]

and/or Undrained shear strength, Cu: [kN/m²]

Soil type
ClaySiltSandPeat

Further description of sub-grade soil (if required)

Ground water table below ground surface level [m] (approximate)

Aggregate fill

DoT Type 16F1/6F46F2/6F5Others

Approximate maximum aggregate particle size:

Asphalt layers

Asphalt Base Course [mm]

Asphalt Surfacing Course [mm]

Asphalt Binder Course [mm]

Project drawings provided?
YesNo

Project Geometry and Loading

Total length of road [m]

Total Width of road [m]

or Total trafficked area [m²]

In addition to the construction traffic, please include the traffic the road may experience during its design life,
and input the number of visits per day/week/month:

Vehicle type	Number of visits
Typical cars [w ≈ 10kN (≈ 1 tonne)]
Light construction vehicles [w ≈ 50kN (≈ 5 tonnes)]
Fully loaded vans [w ≈ 25kN (≈ 2.5 tonnes)]
Typical lorries [w ≈ 80kN (≈ 8 tonnes)]
Heavy tippers and lorries [w ≈ 120kN (≈ 12 tonnes)]

Estimated number of axle passes [ESALs] = [e.g. 0.5msa, 1.0msa, etc.]

Is Foundation Class (CD225/ Class 1 or 2) required?
YesNo

[Note: For construction purpose, we will consider a typical 20t truck (max axle load 97.5kN) in our assessment.]

Notes:

Design Parameters used by ABG to be reviewed and confirmed by the Customer:

The following values will be used in our design, if detailed information is not available from the customer.

Typical design capacities:
Housing Development - 1M - 5M ESALs
Unclassified/Private Road - 0.5M-1M ESALs
Car Parking Bays - 0.05M ESALs

Typical asphalt stiffness values:

HRA 40/60 (Hot Rolled Asphalt) - 3100 MPa
SMA / DBM (surface course) - 2500 MPa
DBM 100/150 (binder and base course) - 2500 MPa
DBM / HDM 40/60 (binder and base course) - 4700 MPa

Typical aggregate stiffness values:
Unbound Sub-base - 135 - 150 MPa
Unbound Capping - 60 - 75 MPa

Additional notes relative to overall design assessment

Attachments

Relevant drawings / project info

Zip file only. Maximum file size 25mb.

SI Report

Zip file only. Maximum file size 25mb.