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  2. Subbase (pavement) - Wikipedia

    en.wikipedia.org/wiki/Subbase_(pavement)

    Layers in the construction of a mortarless pavement: A.) Subgrade B.) Subbase C.) Base course D.) Paver base E.) Pavers F.) Fine-grained sand. In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted when there will be only foot traffic on the pavement ...

  3. Base course - Wikipedia

    en.wikipedia.org/wiki/Base_course

    The base course or basecourse in pavements is a layer of material in an asphalt roadway, race track, riding arena, or sporting field. It is located under the surface layer consisting of the wearing course and sometimes an extra binder course. If there is a sub-base course, the base course is constructed directly above this layer.

  4. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    The material can be made of virgin (newly mined) rock, or of recycled asphalt and concrete. Base is used as a base course in roadways, as a base course for cement pads and foundations, and as backfill material for underground pipelines and other underground utilities. The base course is the sub-base layer of an asphalt roadway.

  5. Road surface - Wikipedia

    en.wikipedia.org/wiki/Road_surface

    Any steel reinforcing is removed, and the ground pavement is compacted to form the base and/or sub-base layers for new asphalt pavement. [35] Ground pavement may also be compacted for use on gravel roads. [34] Cold in-place recycling: Bituminous pavement is ground or milled into small particles. The asphalt millings are blended with asphalt ...

  6. Wearing course - Wikipedia

    en.wikipedia.org/wiki/Wearing_course

    In flexible pavements, the upper layer consists of asphalt concrete, that is a construction aggregate with a bituminous binder. The wearing course is typically placed on the binder course which is then laid on the base course, which is normally placed on the subbase, which rests on the subgrade. There are various different types of flexible ...

  7. Highway engineering - Wikipedia

    en.wikipedia.org/wiki/Highway_engineering

    Highway engineering (also known as roadway engineering and street engineering) is a professional engineering discipline branching from the civil engineering subdiscipline of transportation engineering that involves the planning, design, construction, operation, and maintenance of roads, highways, streets, bridges, and tunnels to ensure safe and effective transportation of people and goods.

  8. Rubblization - Wikipedia

    en.wikipedia.org/wiki/Rubblization

    This saves the expense of transporting the old pavement to a disposal site, and purchasing/transporting new base materials for the replacement paving. [1] The result is a smoother pavement surface than would be obtained if a layer of asphalt were to be applied to the unbroken concrete surface. [2]

  9. Crocodile cracking - Wikipedia

    en.wikipedia.org/wiki/Crocodile_cracking

    There are many ways that the subbase or base can be weakened. Poor drainage in the road bed is a frequent cause of this degradation of the base or subgrade. [1] A heavy spring thaw, similarly to poor drainage, can weaken the base course, leading to fatigue cracking. [1] Stripping or raveling is another possible cause of fatigue cracking.