Black Diamond Paving, CO.

1. Black Diamond Paving, CO. KerstenStelmach, Maggie Bailey, Hailey Frankland

2. Cost & Time • 20 minutes for the asphalt to get to about 300 degrees • The average time it takes to pave a regular freeway is about two days • 275$ per square foot for highways

3. Transportation of Asphalt • HMA (Hot Mix Asphalt) is put in trucks to be transported to the paving sites • The trucks dump the HMA into hoppers located in the front of paving machines • The asphalt must stay at 175 degrees

4. Location in Distillation Tower Lighter hydrocarbons are towards the top of the fractional column while the heavier molecules are towards the bottom

5. Process Involved in Manufacturing • Asphalt chunks or millings are loaded into an asphalt recycler that mixes them until they are combined • Asphalt is a compound • It includes sand, crushed stone, or gravel • Also petroleum and crude oil is mixed with it too • Depending on how much you heat it up, it could become a solid or a liquid

6. Process cont. • The hydrocarbon material is made from the left over waste material from kerosene, gasoline, and diesel fuels • Asphalt is a hydrocarbon mixture that is heated until it has the consistency of tar • Asphalt is a by-product of the excess material after crude oil and petroleum have been harvested • http://www.youtube.com/watch?v=FI2JQ-bVNMw

7. Benefits of Mankind/earth/living Organisms • There are four main advantages of using asphalt: • Economical • Durable • Safe • Recyclable

8. Economical • Low cost • It takes less time to complete construction • Saves contractors, public, and government time • Dries very fast, less traffic

9. Durability • Can be used for low and high traffic conditions • Tractor trailers can drive on it without it cracking under pressure • Can width stand different weather conditions • High flexibility

10. Safety • Smooth like finish • Skid resistant • Reduces splash-back • Better visual differences (reduces surface water)

11. Recyclable • 100% recyclable • Saves renewable, natural resources • Its life cycle never ends (can be reused over and over) • Every year, 75 million tons of asphalt is recycled

12. Risks if Asphalt is not Manufactured • If asphalt isn’t manufactured, road conditions would not be suitable for travel • They would become cracked and uneven over time • Runways for planes won’t be able to handle the weight and its velocity • Eventually, the roads wouldn’t be in a good enough condition to drive on • Without petroleum in asphalt, it wouldn’t be durable • The bond between all the materials wouldn’t stick together and form

13. Research & Development • By using the RAP, it will lower the amount of petroleum, crude oil, and other materials needed • an owner operator recycling 50 tons/day for 30 days, will yield a savings/profit of $90,000 • Petroleum is needed to make good quality asphalt • If you discontinue asphalt, we will have to use dirt road and gravel road that damages cars and trucks

14. Disposal of Waste by-products • It is reusable • Asphalt does not add to the landfills • RAP means ‘Reclaimed Asphalt Pavement’, asphalt pavement material that has been removed from paved surfaces and reprocessed (recycled). • This method keeps 75 million tons of asphalt out of the landfills • When it’s time to dispose of the RAP, contractors will often bring it to a hot mix plant, which charges a small fee and then recycles/resells it.

15. References • http://www.apa-mi.org/what_is_hot_mix_asphalt_paveme.php • http://www.asphaltrecycling.com/display.php?cnt_id=24 • http://www.wisegeek.org/how-is-asphalt-made.htm • (Company we called for information is on the sheet)