The Distinct Difference between Bitumen and Tar
When it comes to pavement and roofing, it’s crucial to select the right material for the job. Two common options are bitumen and tar, but what’s the difference between them? Let’s take a closer look.
Composition
Bitumen is a black, sticky, and viscous mixture of hydrocarbons that is a byproduct of crude oil refining. It’s commonly used in construction and road surfacing thanks to its waterproofing and adhesive properties. Tar, on the other hand, is a thick, black, and sticky liquid made of a combination of organic and inorganic materials. It’s primarily used as a sealant and protective coating for industrial and commercial roofing.
Application
One of the main differences between the two substances is their application process. Bitumen is typically heated to a liquid state and then evenly sprayed or poured onto a prepared surface. It’s then left to cool and harden. Tar, meanwhile, is brushed or sprayed onto a surface, often in multiple layers, and then allowed to cure.
Physical Properties
There are notable differences in the physical properties of bitumen and tar. For one, bitumen is more flexible and elastic, adapting better to temperature fluctuations and resisting cracking. Tar, on the other hand, can become brittle when exposed to harsh weather conditions, making it more prone to cracking and damage.
Environmental Impact
When it comes to the environment, bitumen and tar have different implications. Bitumen is a petroleum product, meaning it’s not a renewable resource and has a significant carbon footprint. Tar, on the other hand, can be made from renewable resources like wood and coal, but its production process can be energy-intensive, making it less environmentally friendly.
Conclusion
When deciding between bitumen and tar, it’s crucial to understand their distinct differences. Both materials have their unique strengths and weaknesses, so it’s essential to select the material that’s best-suited for the specific project at hand. With careful consideration, you can select the most appropriate product for your needs, ensuring a durable and long-lasting result.
Table difference between bitumen and tar
| Property | Bitumen | Tar |
|---|---|---|
| Composition | A mixture of hydrocarbons | A residue of high-temperature coal-distillation |
| Appearance | Dark brown to black | Black |
| Uses | Used for road construction, roofing, and waterproofing | Used for road construction and as a binder in pavement-making |
| Elasticity | High | Low |
| Adhesivity | High | Low |
| Stability | Does not harden with time | Hardens with time |