Chipseal, also known as tar and chip, is a type of pavement surface treatment used to provide a durable and low-cost alternative to traditional asphalt paving. The spelling of "chipseal" is pronounced as /ˈtʃɪpsil/ in IPA phonetic transcription. The word is composed of two parts; "chip" referring to the crushed stone and other aggregates used to make the surface, and "seal" referring to the emulsion or asphalt binder used to hold the chips in place. Chipseal offers good skid resistance, water drainage, and resistance to weathering, making it a popular choice for rural and low-traffic roads.
Chipseal is a method of surfacing roads or pavements where a layer of crushed stone or gravel is laid on top of a layer of liquid asphalt. The process involves spraying hot liquid asphalt onto the existing road surface, followed by the application of a layer of small stones or chips. These chips are then compacted into the asphalt using heavy machinery or rolling equipment.
The purpose of chipseal is to create a durable, weather-resistant, and cost-effective road surface that provides sufficient grip for vehicles. The crushed stones or chips act as an aggregate, improving the road's strength and structural integrity. Additionally, the small gaps between the stones allow for proper drainage, preventing water from pooling on the road surface and reducing the risk of hydroplaning.
Chipseal is commonly used for various road surfaces, including rural roads, residential streets, highways, and airport runways. It is typically applied on roads with moderate traffic volumes and serves as an effective way to maintain and extend the lifespan of existing asphalt surfaces.
Although chipseal offers numerous benefits, it can have some drawbacks. It can produce more road noise compared to other surfacing methods, and the loose stones may be kicked up by passing vehicles, potentially causing damage or windshield cracks. However, regular maintenance, including sweeping and reapplication of the protective layer, can help mitigate these issues and prolong the life of the chipsealed road.
The word "chipseal" is a combination of two separate elements: "chip" and "seal".
The term "chip" refers to small pieces or fragments, often irregular in shape. In this context, it specifically refers to small aggregate materials like rocks, stones, or crushed gravel that are used in road construction.
The word "seal" refers to the action of sealing or securing something. In the case of roads, it refers to the process of applying a layer of bitumen or asphalt to the surface in order to protect it and improve its durability.
Therefore, "chipseal" is a compound word that describes the process of covering a road or pavement surface with small chips or aggregate stones and then sealing them with a layer of bitumen or asphalt.