ASPHALT CONCRETE Meaning and
Definition
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Asphalt concrete refers to a highly versatile and widely used paving material composed of a mixture of aggregates (such as rocks, sand, and gravel) and a binder known as asphalt cement. It is commonly used in the construction and maintenance of roadways, highways, parking lots, and various other surfaces subjected to vehicular and pedestrian traffic.
The mixture is created by combining the aggregates with the proper amount of asphalt cement, which acts as a binding agent to hold the particles together. The aggregates used in asphalt concrete can range in size and composition, allowing the final product to be tailored to specific needs. Additionally, the asphalt cement used can vary in viscosity and properties depending on the climate conditions and traffic demands of the area where it will be applied.
Once the mixture is thoroughly blended, it is compacted and spread over a prepared surface using specialized machinery. The asphalt concrete is then heated, causing it to harden and bind the aggregates together, forming a durable and resistant surface. This process, often referred to as paving or blacktopping, creates a smooth and even road or pavement that enhances driving comfort and safety.
Asphalt concrete offers several advantages, including its ability to withstand heavy loads, resist water penetration, and adapt to various weather conditions. It also provides an excellent traction surface for vehicles, reducing the chance of skidding or slipping. With proper maintenance, asphalt concrete pavements can have a long lifespan, making them a popular choice in the construction industry.
Etymology of ASPHALT CONCRETE
The word "asphalt" comes from the Late Latin word "asphaltum", which is derived from the Greek word "asphalton". This Greek word referred to a specific mineral pitch found in the Dead Sea region, which was used by ancient civilizations for various purposes, including waterproofing and as a building material. The word "concrete" comes from the Latin word "concretus", which means "grown together" or "hardened". In the case of "asphalt concrete", the term "asphalt" refers to the bituminous material used in the mixture, while "concrete" indicates the hardened composite material formed when the asphalt is combined with aggregate such as crushed stone, gravel, and sand.
