Pavement
Pavement is a durable surface layer used in road, walkway, and other traffic-bearing construction.
Pavement is a durable surface layer used in road, walkway, and other traffic-bearing construction. In civil engineering, the term usually refers to layered road structures made from materials such as asphalt, concrete, aggregates, and base or sub-base layers. Pavements are commonly classified as flexible, rigid, or composite.
Types of pavement
Pavements are commonly divided into flexible, rigid, and composite types. Flexible pavements typically use asphalt concrete over granular base and sub-base layers supported by compacted soil. Rigid pavements typically use a portland cement concrete slab, with or without a base layer. Composite pavements combine asphalt and concrete in the same roadway structure, often as a rehabilitation layer.
Materials used in pavement construction
Common pavement materials include aggregates, asphalt/bitumen, Portland cement, gravel, sand, and other bound or unbound materials. Aggregates are a major constituent of both bituminous and Portland cement concrete pavements and are also used in base and sub-base courses. The material mix depends on the intended pavement type and structural layer.
Layered pavement structure
Road pavements are usually built in layers, including the surface course, base, sub-base, and subgrade. These layers work together to distribute traffic loads and improve durability. The structure often includes a surface layer, base, sub-base, and subgrade layers.
Material testing and performance
Pavement materials are evaluated for strength, toughness, abrasion resistance, soundness, water absorption, and shape characteristics. These tests help determine whether materials are suitable for traffic loading and long-term performance. Pavement materials are selected and tested for strength, durability, shape, abrasion resistance, and related properties.
Key facts
- Flexible pavements typically use asphalt concrete over granular base and sub-base layers supported by compacted soil.
- Rigid pavements typically use a portland cement concrete slab, with or without a base layer.
- Composite pavements combine asphalt and concrete in the same roadway structure, often as a rehabilitation layer.
- Aggregates are a major constituent of both bituminous and Portland cement concrete pavements and are also used in base and sub-base courses.
- Pavement materials are selected and tested for strength, durability, shape, abrasion resistance, and related properties.
Pavement is directly relevant to Canadian road, sidewalk, and infrastructure engineering, including the design of highways, municipal streets, and winter-resistant surfaces.
Frequently asked questions
What is pavement in civil engineering?
What are the main types of pavement?
What is flexible pavement made of?
What is rigid pavement made of?
What materials are commonly used in pavement?
References
- Pavement Design and Materials — http://ndl.ethernet.edu.et/bitstream/123456789/74661/1/5.pdf?dfDeU=7KH7qXSupports: Defines flexible, rigid, and composite pavements and describes their typical structural layers.
- Pavement Materials — https://sjce.ac.in/wp-content/uploads/2018/01/Pavement-Materials.pdfSupports: Describes aggregates used in pavement construction and their required properties and tests.
- Federal Highway Administration — https://www.fhwa.dot.gov/pavement/materials/pubs/hif10002/hif10002.pdfSupports: Classifies pavement construction materials into natural and manufactured materials.
- Indian Institute of Technology Bombay — https://www.civil.iitb.ac.in/tvm/1100_LnTse/404_lnTse/plain/plain.htmlSupports: Explains aggregates as major constituents of bituminous and Portland cement concrete and lists common pavement tests.
- PIARC — https://www.piarc.org/ressources/documents/984,Pavement-surface-materials-used-in-u.pdfSupports: Summarizes urban pavement surface materials including bituminous-bound, cement-bound, paving elements, and composite pavements.