Coal tar and asphalt are both widely used in the construction industry but are vastly different materials. Asphalt is a petroleum based substance, while coal tar is a by-product of coal.
In this blog, we will explore the differences between coal tar and asphalt and why they are used in the construction industry.
Origin and composition of coal tar and asphalt
Coal tar and asphalt are both dark-brown to black in color, but have different origins and compositions. Coal tar is a by-product of the coking process, which is used to make coke for the steel industry.
Asphalt, on the other hand, is a mixture of complex hydrocarbons and is derived from petroleum, which is made up of lighter hydrocarbons. Asphalt also contains a variety of other materials, including gravel and sand, and may be modified with certain chemicals to increase its adhesion, flexibility, and durability. Coal tar, on the other hand, is a thick, sticky liquid that is used as a sealant and waterproofing agent, and is not usually modified.
Difference in properties of coal tar and asphalt
The difference between coal tar and asphalt is vast, yet subtle. Coal tar is a byproduct of the distillation of coal, and is composed of a variety of organic compounds that give it a black and viscous consistency.
When it comes to durability, coal tar has a higher resistance to weather and temperature extremes, while asphalt is more susceptible to wear and tear. In terms of cost, coal tar is generally more expensive than asphalt due to its complex composition.
Finally, coal tar is oftentimes used as a sealant for roofs and other surfaces, while asphalt is best used for paving and surfacing applications.
Applications of coal tar and asphalt
Coal tar and asphalt are two materials that are often used in construction and paving projects. While they may appear to be similar, they are in fact very different and have distinct applications. Coal tar is a thick, black liquid that is a byproduct of the process of distilling coal to produce coke and other products.
Coal tar is a thick, black liquid that is a byproduct of the process of distilling coal to produce coke and other products. Asphalt, on the other hand, is a mixture of sand, gravel, and bitumen which is derived from petroleum. Coal tar is used primarily as a preservative and protective coating for wood, concrete, and metal surfaces.
It is also used as a sealant for roofs, bridges, and other structures. Asphalt is mainly used for paving roads, driveways, and other surfaces.
It is also used for waterproofing and protecting surfaces from the elements.
Environmental impact of coal tar and asphalt
Coal tar and asphalt are two materials with many similarities – they are both used in the construction of roads and other surfaces – but they also have some differences. Coal tar is a byproduct of the production of coke from coal, and it is a thick, black, viscous liquid.
Both materials have an environmental impact, but the differences between them are important to consider when assessing their respective impacts. Coal tar is typically used as a binding agent in asphalt and therefore can have a larger environmental effect due to the production of coke.
Asphalt, being a petroleum-based product, can have its own environmental impacts depending on the extraction and refining processes used.
Cost comparison of coal tar and asphalt
When it comes to choosing the right surfacing material for your project, it’s important to weigh up the cost and performance of your options. Coal tar and asphalt are two common surfacing materials, but what is the difference between them?
Coal tar is a by-product of the coal production process, and its main advantage is that it is more cost-effective than asphalt. On the other hand, asphalt is created from oil and has a higher performance rating, making it the material of choice for long-term projects. In terms of cost, coal tar is usually less expensive, but it also has a shorter lifespan than asphalt.
So, if you’re considering a long-term project, asphalt may be the better option in the long run.
Bottom Line
In conclusion, the primary difference between coal tar and asphalt is the origin of the materials used. Coal tar is derived from burning coal and is a byproduct of the process, whereas asphalt is a naturally occurring mixture of sand, gravel, and bitumen. Both materials are often used in roofing and paving applications, but they have different properties and benefits.
Both materials are often used in roofing and paving applications, but they have different properties and benefits. Asphalt is more commonly used due to its cost and availability, while coal tar can provide better protection against certain types of weathering. Ultimately, the best material for a particular project will depend on the needs of the individual or organization.
