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  2. Gravel road - Wikipedia

    en.wikipedia.org/wiki/Gravel_road

    Compared to sealed roads, which require large machinery to work and pour concrete or to lay and smooth a bitumen-based surface, gravel roads are easy and cheap to build.. However, compared to dirt roads, all-weather gravel highways are quite expensive to build, as they require front loaders, dump trucks, graders, and roadrollers to provide a base course of compacted earth or other material ...

  3. 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 ...

  4. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    A limestone quarry 10 mm graded crushed basalt rock or aggregate, for use in concrete, called "blue metal" in Australia 20 mm graded aggregate A gravel and sand extraction facility in Međimurje County, Croatia Chipseal aggregate on Ellsworth Road in Tomah, Wisconsin. Construction aggregate, or simply aggregate, is a broad category of coarse ...

  5. Base course - Wikipedia

    en.wikipedia.org/wiki/Base_course

    Class 3 Road Base Layers in the construction of a mortarless pavement: A. Subgrade B. Subbase C. Base course D. Paver base as binder course E. Pavers as wearing course F. Fine-grained sand. The base course or basecourse in pavements is a layer of material in an asphalt roadway, race track, riding arena, or sporting field.

  6. Macadam - Wikipedia

    en.wikipedia.org/wiki/Macadam

    A Frenchman from an engineering family, he worked paving roads in Paris from 1757 to 1764. As chief engineer of road construction of Limoges, he had opportunity to develop a better and cheaper method of road construction. In 1775, Tresaguet became engineer-general and presented his answer for road improvement in France, which soon became ...

  7. Road surface - Wikipedia

    en.wikipedia.org/wiki/Road_surface

    Gravel road in Namibia. Gravel is known to have been used extensively in the construction of roads by soldiers of the Roman Empire (see Roman road) but in 1998 a limestone-surfaced road, thought to date back to the Bronze Age, was found at Yarnton in Oxfordshire, Britain. [45] Applying gravel, or "metalling", has had two distinct usages in road ...

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    mail.aol.com

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  9. Types of road - Wikipedia

    en.wikipedia.org/wiki/Types_of_road

    A road is a thoroughfare, route, or way on land between two places that has been surfaced or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse.