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  2. Layer between the base course and subgrade
    The layer between the base course and subgrade. It functions primarily as structural support but it can also minimize the intrusion of fines from the subgrade into the pavement structure and improve drainage. The subbase generally consists of lower quality materials than the base course but better than the subgrade soils.

    Pavement Structure - Pavement Interactive

    pavementinteractive.org/reference-desk/design/structural-design/pavement-structure/
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    What is a subbase layer?
    The subbase is the layer of aggregate material that lies immediately below the pavement and usually consists of crushed aggregate or recycled materials. The Main Roles of the Subbase Layer in Pavements: Include provision of the following (Dawson 1995).

    Section 6F-1 - Pavement Subbase Design and Construction

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    What is a sound sub-base?
    Most paving relies on the support, literally, of a sound sub-base, a layer of crushed aggregate that provides strength and load-bearing capability. This page goes through the hows, the whys, and the whats about sub-bases and sub-base materials. The sub-base layer is often the main load-bearing layer of a pavement.

    Sub-bases - pavingexpert

    pavingexpert.com
    What are the different types of subbases?
    Common types of subbases include aggregate subbases, asphalt subbases, concrete subbases, and soil subbases, each tailored to specific construction needs. 3. How is proper compaction achieved in construction? Proper compaction in subbase construction is achieved by eliminating air gaps through thorough compaction, creating a solid foundation. 4.

    Importance of Subbase in Construction - Structural Guide

    structuralguide.com
    How does a sub-base work?
    A sub-base works by distributing a point load over a larger area. The interlock between adjacent particles of the sub-base material ensures that a relatively thin layer of the right sort of crushed aggregate can dramatically improve the ability of the ground to carry comparatively heavy loads.

    Sub-bases - pavingexpert

    pavingexpert.com
    Which subbase layers are not recommended?
    For these reasons, and others described in this publication, the following categories of subbase layers are not recommended: cement-treated permeable subbase, asphalt-treated permeable subbase and unstabilized open-graded subbases with a permeability coefficient more than about 350 ft/day (107 m/day) in laboratory tests.

    EB204 - Subgrades and Subbases for Concrete Pavements

    wikipave.org
    What is the difference between a subbase and a foundation?
    Subbases typically utilize graded blends of gravels, crushed stone, recycled asphalt, or concrete. The blended gradation compacts tightly under loading for a durable intermediate layer. The top foundational layer is the base course, usually made of crushed stone or a stabilized aggregate mix.

    Optimal Asphalt Subbase Design: My Best Practices ... - Asphalt Calculator

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  4. Wikipedia
    https://en.wikipedia.org › wiki › Subbase_(pavement)

    Subbase (pavement) - Wikipedia

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  5. AboutCivil.Org
    https://www.aboutcivil.org › road-structure-cross-section.html

    Typical Road Structure Cross Section - Sub Grade, Base Course, …

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  7. Structural Guide
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    Importance of Subbase in Construction - Structural Guide

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  8. webspec.cloud
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    Section 6F-1 - Pavement Subbase Design and Construction

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  9. Paving Expert
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    Sub-bases - pavingexpert

  10. calculatorasphalt.com
    https://calculatorasphalt.com › optimal-a…

    Optimal Asphalt Subbase Design: My Best Practices

    Dec 18, 2023 · Often rushed yet critically important, getting subbase layers right lays the foundation for enhanced road lifespan and reduced maintenance costs. On my technical guidance site CalculatorAsphalt, I want to share the key best …

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  11. Pavement Interactive
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    Pavement Structure - Pavement Interactive

    Base courses are usually constructed out of crushed aggregate or HMA. Subbase Course. The layer between the base course and subgrade. It functions primarily as structural support but it can also minimize the intrusion of fines …

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    Structure
  12. ttca.com
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    The Top 3 Tests To Perform On Your Road Base and …

    The base course layer rests atop what is known as the sub-base layer. This layer is designed to evenly spread the load of paving and traffic.

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  13. wikipave.org
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    EB204 - Subgrades and Subbases for Concrete Pavements

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    Concrete and Cement
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    Design Guide for Subgrades and Subbases

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