paving.]] Asphalt (or Bitumen) is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits. Until the 20th century, the term asphaltum was also used. The Persian word for asphalt is moom, which is related to the English word mummy. Asphalt was also used by ancient Egyptians to embalm mummies. such as scabbards and other items. Statuettes of household deities were also cast with this type of material in Japan, and probably also in China.

In North America, archaeological recovery has indicated that asphaltum was sometimes used to apply stone projectile points to a wooden shaft. Then on 25 November 1837, Richard Tappin Claridge patented the use of Seyssel asphalt (patent #7849), for use in asphalte pavement,

In 1838, Claridge obtained patents in Scotland on 27 March, and Ireland on 23 April, and in 1851 extensions were sought for all three patents, by the trustees of a company previously formed by Claridge. "The formation in 1838 of Claridge's Patent Asphalte Company (with a distinguished list of aristocratic patrons, and Marc and Isambard Brunel as, respectively, a trustee and consulting engineer), gave an enormous impetus to the development of a British asphalt industry". "By the end of 1838, at least two other companies, Robinson's and the Bastenne company, were in production",

In 1914, Claridge's Company entered into a joint venture to produce tar-bound macadam, and in a subsequent attempt to save the Clarmac Company.

Early use in the United States

The first use of asphaltum in the New World was by indigenous tribes. On the west coast, as early as the 13th century, the Tongva and Chumash Nations collected the naturally occurring asphaltum that seeped to the surface above underlying petroleum deposits. Both tribes used the substance as an adhesive. It is found on many different artifacts of tools and ceremonial items. For example, it was used on rattles to adhere gourds or turtle shells to rattle handles. It was also used in decorations. Small round shell beads were often set in asphaltum to provide decorations. It was used as a sealant on baskets to make them water tight for carrying water. Asphaltum was used also to seal the planks on ocean-going canoes.

Roads in the US have been paved with asphalt since at least 1870, when a street in front of Newark, NJ's City Hall was paved. In 1876, asphalt was used to pave Pennsylvania Avenue in Washington, DC, in time for the celebration of the national centennial.

Rolled asphalt concrete

The largest use of asphalt is for making asphalt concrete for road surfaces and accounts for approximately 85% of the asphalt consumed in the United States. Asphalt pavement material is commonly composed of 5 percent asphalt cement and 95 percent aggregates (stone, sand, and gravel). Due to its highly viscous nature, asphalt cement must be heated so that it can be mixed with the aggregates at the asphalt mixing plant. There are about 4,000 asphalt mixing plants in the U.S.

Asphalt road surface is the most widely recycled material in the US, both by gross tonnage and by percentage. According to a report issued by the Federal Highway Administration and the United States Environmental Protection Agency, 80% of the asphalt removed each year from road surfaces during widening and resurfacing projects is reused as part of new roads, roadbeds, shoulders and embankments.

Roofing shingles account for most of the remaining asphalt consumption. Other uses include cattle sprays, fence post treatments, and waterproofing for fabrics.

Asphalt is widely used in airports around the world. Due to the sturdiness, it is widely used for runways dedicated to aircraft landing and taking off.

Mastic asphalt

Mastic asphalt is a type of asphalt which differs from dense graded asphalt (asphalt concrete) in that it has a higher bitumen (binder) content, usually around 7–10% of the whole aggregate mix, as opposed to rolled asphalt, which has only around 5% added bitumen. This thermoplastic substance is widely used in the building industry for waterproofing flat roofs and tanking underground. Mastic asphalt is heated to a temperature of and is spread in layers to form an impervious barrier about thick.

Asphalt emulsion

A number of technologies allow asphalt to be mixed at much lower temperatures. These involve mixing the asphalt with petroleum solvents to form "cutbacks" with reduced melting point or mixtures with water to turn the asphalt into an emulsion. Asphalt emulsions contain up to 70% asphalt and typically less than 1.5% chemical additives. There are two main types of emulsions with different affinity for aggregates, cationic and anionic. Asphalt emulsions are used in a wide variety of applications. Chipseal involves spraying the road surface with asphalt emulsion followed by a layer of crushed rock or gravel. Slurry Seal involves the creation of a mixture of asphalt emulsion and fine crushed aggregate that is spread on the surface of a road. Cold mixed asphalt can also be made from asphalt emulsion to create pavements similar to hot-mixed asphalt, several inches in depth and asphalt emulsions are also blended into recycled hot-mix asphalt to create low cost pavements.

Alternatives and bioasphalt

Certain activist groups have become increasingly concerned about the global peak oil and climate change problem in recent years due to by-products that are released into the atmosphere. Most of the emissions are derived primarily from burning fossil fuels. This has led to the introduction of petroleum bitumen alternatives that are more environmentally friendly and non-toxic.

See also

Blacktop

Asphalt solar collector

Tarmac

International Grooving & Grinding Association

Further reading

Notes

References

Barth, Edwin J., Asphalt: Science and Technology Gordon and Breach (1962). ISBN 0-677-00040-5.

External links

Pavement Interactive - Asphalt

U.S EPA

Asphalt Magazine

CSU Sacramento, The World Famous Asphalt Museum!

National Institute for Occupational Safety and Health - Asphalt Fumes

Category:Building materials Category:Petroleum products Category:Road construction Category:Chemical mixtures Category:Amorphous solids Category:Greek loanwords

Coordinates	54°1′48″N18°27′52″N
Name	Jason Aldean
Background	solo_singer
Birth name	Jason Aldine Williams
Instrument	Vocals, Rhythm guitar
Genre	Country, Country-rock
Occupation	Singer
Years active	2005–present
Label	Capitol NashvilleBroken Bow
Associated acts	Kelly Clarkson Miranda Lambert Brantley Gilbert Michael Knox
Url	Jason Aldean.com

Jason Aldine Williams (born February 28, 1977 in Macon, Georgia) is an American country music singer, known professionally as Jason Aldean. Since 2005, Aldean has recorded for Broken Bow Records, an independent record label for which he has released four albums and twelve singles. His 2005 self-titled debut and 2009 album Wide Open are both certified platinum by the Recording Industry Association of America (RIAA), while 2007's Relentless is certified gold. Of his singles, four have reached the number one position on the Hot Country Songs charts: "Why", "She's Country", "Big Green Tractor" and "The Truth", and six more have reached top ten on the same chart.

Early life

Aldean's parents, Barry and Debbie, divorced when he was three. He was raised by his mother, mainly in Macon, Georgia. During the summer he would spend time with his father in Homestead, Florida.

Before going to work during the day, his dad would map out guitar chords on notebook paper to show Jason where to place his fingers to play the chords. Jason sat and practiced all day while his dad was at work. When his dad got home, he got out his own guitar and they played together. Soon, after hearing a song only a few times, he could play it. His early favorites included George Strait's "The Cowboy Rides Away", Hank Williams Jr.'s "The Blues Man", and Alabama's "My Home's in Alabama". Both parents encouraged young Jason as he progressed musically. From age 14, after watching the country-music awards on TV, he wanted to perform on stage. With his mother's help, he performed at the local VFW hall in Macon, Georgia. He sang John Anderson's song "Seminole Wind" and Tracy Lawrence's "Sticks and Stones". He would later say that the entire audience — all ten — applauded, and that he almost had to be dragged off the stage because he was hooked on performing. He began performing at area talent contests and local fairs. At 15, he joined the "house band" at the Macon, Georgia nightspot Nashville South.

Personal life

Aldean currently lives in Nashville, TN with his wife Jessica and their two daughters Keeley (Born in 2003) and Kendyl (Born in 2007).

Musical career

After high school, with his father's help, Aldean and his band performed in college towns in Florida, Alabama, and Georgia, and then further up the southeastern seaboard. With one of the band's members, Justin Weaver, Aldean began writing songs. In 1998 he performed his original songs at a showcase staged by Atlanta nightclub The Buckboard. He was approached by Michael Knox, then of the Warner-Chappell song-publishing company. It served as the lead-off to his album Jason Aldean, and reached a peak of #10 on the Billboard Hot Country Songs charts. The album also produced his first Number One hit in "Why", as well as the #4-peaking "Amarillo Sky", which had previously been a non-charting single in 2002 for McBride & the Ride. Amarillo Sky earned a 2006 ACM nomination for song of the year and video of the year. Jason Aldean earned the title of "Top New Male Vocalist" at the 2006 Academy of Country Music Awards. Jason Aldean has sold over one million copies in the United States, and was certified platinum by the RIAA in 2007.

Relentless (2007-2008)

Aldean spent most of January 2007 in the studio with producer Michael Knox to finish his second album, Relentless. This album was released on May 29, 2007, and at Wal-Mart, it was released with a Limited Edition CMT Pick DVD that includes performances from Jason Aldean. The album's lead-off single, "Johnny Cash", was originally recorded by Tracy Byrd and peaked at #6 when Aldean released it. Its followup, "Laughed Until We Cried", has become his fifth consecutive Top Ten hit. Relentless has also been certified gold by the RIAA, and its title track was released as its third single. The song has also been Aldean's lowest charting single in both the U.S. and Canada, failing to reach Top Ten on the country charts.

Wide Open (2009-2010)

Aldean released a seventh single titled "She's Country" to radio on December 1, 2008. It is the first single from his third album Wide Open which was released on April 7, 2009. The single debuted at #51 on the Hot Country Songs chart in late-November 2008. His seventh consecutive Top 40 hit on the country charts, it is also his first Top 40 hit on the Billboard Hot 100, and became his second number-one hit, and his first since "Why" in May 2006. The next single, the David Lee Murphy-Jim Collins co-write "Big Green Tractor," became Aldean's third Number One hit. Wide Open debuted at #2 on the Top Country Albums chart. "The Truth" became the album's third consecutive Number One hit in January 2010, with "Crazy Town" being the album's fourth single, peaking at #2 on the country charts.

Jason Aldean performed with Bryan Adams on an episode of CMT Crossroads in the beginning of May, and the episode premiered on June 26, 2009. In an interview with Shave Magazine, Jason explained that working with Bryan on Crossroads "was great. He was a lot of fun." But the real highlight for Jason was working with Randy Owen. "I am a big fan of Alabama so I got a chance to work with Randy Owen on this album (it didn’t make the album but it eventually made a bonus track). It was really cool. Alabama were like ‘The Beatles’ for me so working with him was definitely one of the highlights. I mean, both of those guys were really cool moments, but, if I had to pick one highlight, it would be working with Randy this year."

A live DVD titled Wide Open Live & More was released on August 25, 2009.

At the 2010 CMT music Awards Jason Aldean picked up 3 nominations in Video of the Year and Male Video of the Year for "The Truth", as well as collaborative video of the year and CMT performance of the year for his performance of "Heaven" with Bryan Adams.

My Kinda Party (2010-Present)

Aldean released a new single in August 2010, "My Kinda Party," which entered the Hot Country Songs chart at #41, which is the lead-off single from his album of the same name, released on November 2, 2010. It marks as Aldean's tenth top 10 country hit. He also collaborated with Kelly Clarkson on the intimate duet "Don't You Wanna Stay". Aldean and Clarkson's performance on November 10, 2010 at the CMA Awards received positive recognition, and debuted at #59 on Billboard's Hot Country Songs chart from unsolicited airplay for the week of November 20, 2010.

Discography

Albums

2005: Jason Aldean

2007: Relentless

2009: Wide Open

2010: My Kinda Party

References

External links

Jason Aldean Official Site

Category:1977 births Category:American country singers Category:American male singers Category:Broken Bow Records artists Category:Living people Category:Musicians from Georgia (U.S. state) Category:People from Macon, Georgia