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You are here: Home / Pavement and Foundation / Definition of Hot Mix Asphalt

Definition of Hot Mix Asphalt

October 2, 2013 by admin 2 Comments

Hot Mix Asphalt HMA

Hot mix asphalt (HMA) is “the black stuff” used as a pavement material. Its a combination of aggregate and asphalt binder mixed together at elevated temperatures that forms a hard, strong construction material when cooled to suitable temperatures.

Also known as “asphalt concrete” (AC or ACP), “asphalt”, “blacktop” or “bitumin“. They must be mixed very well to make sure that the rocks are evenly distributed in the mix. Each rock piece must be completely coated by the asphalt.

Once it is well mixed, it is laid down on the roadway as pavement. The pavement must then be compacted to achieve uniform density. If this is not done properly,  it can reduce the lifetime of the pavement and increase the costs of maintaining the road.
It usually costs less. The life expectancy of an asphalt pavement is between 15 to 20 years.

surface course by hot mix asphalt
Surface course by hot mix asphalt

Filed Under: Pavement and Foundation

Reader Interactions

Comments

  1. umer says

    October 6, 2013 at 1:02 pm

    great work….

    Reply
  2. admin says

    October 6, 2013 at 9:39 pm

    Thank you 🙂

    Reply

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