The Causes Of Acne... And How To Avoid Them

Written by Steve William

If you aren't a sufferer ofrepparttar effects of acne, feel lucky. Acne is one ofrepparttar 136946 most common skin diseases inrepparttar 136947 United States, affecting some 17 million people.

By definition, it occurs whenrepparttar 136948 pores ofrepparttar 136949 skin are plugged, whererepparttar 136950 natural oil, called sebum, can't reachrepparttar 136951 pore's surface.

Doctors believe that it could berepparttar 136952 overproduction of sebum that contributes torepparttar 136953 clogging of pores, which results inrepparttar 136954 formation of pimples and zits. All of this occurs especially aroundrepparttar 136955 time of puberty, adolescence and even into adulthood.

Problems with severe acne can go on for years, even into one's forties or fifties.

The sebaceous glands, which producerepparttar 136956 sebum, connect torepparttar 136957 hair follicle. Breakouts of pimples and/or zits onrepparttar 136958 face, upper-back and chest are most common in this are because this is whererepparttar 136959 glands are most active.

While acne isn't a deadly disease, per se, it can lead to problems later for those who've been inflicted by it. Whiteheads and blackheads can last for an extended period of time, causing irritation and inflammation.

Sufferers of acne usually become self-conscious ifrepparttar 136960 pimples and zits lead to cysts that can leave deep facial scars. These scars may never truly disappear.

Paving The Way For California's Asphalt Consumers

Written by Brett Lane

The California asphalt paving industry is ever-changing and in order to providerepparttar best services, asphalt paving companies are turning to new technologies to stay ahead ofrepparttar 136467 competition.

Asphalt technology in California has been changing sincerepparttar 136468 creation of Hot Mix Asphalt and will continue to change as time permits. Asphalt rubber pavement was introduced in 1991, which shocked many industry experts. Asphalt rubber pavement seemed promising to those inrepparttar 136469 industry who were ready for a change. Onrepparttar 136470 other end ofrepparttar 136471 spectrum were industry experts who thought thatrepparttar 136472 world wasn't ready for such technologies to be implemented.

In Tom Kuennens article titled, "Asphalt Rubber Makes a Quiet Comeback" shown in Better Roads Magazine, he describes rubber asphalt as, "a chemically reacted mix of liquid asphalt binder with 15 to 22% crumb rubber. The rubber is obtained from reclaimed tires, and added to liquid asphalt. It's reacted at elevated temperatures prior to being mixed with aggregate."

There are two types of asphalt rubber (wet process) are used in California. Type A- contains rubber only from ground tires, and Type B contains rubber from both ground tires and natural rubber. Caltrans seems to favor Type B binders because they have better resistance to reflection cracking and provide better stability. Rubber pavement disappeared for a few years due an increase in asphalt pavement technologies and a decrease in existing pavement costs associated with this form of material. Until recently, a number of important developments have helped propel asphalt rubber pavement to its current level of acceptance, including new tire-shredding technologies andrepparttar 136473 establishment of tire recycling facilities in every part ofrepparttar 136474 United States.

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