Under Depth

Hot mix plants for asphalt are assembly of mechanical and electronic apparatus where aggregates are being blended, heated, dried and mixed with binder to make hot mix asphalt meeting particular requirements. The plant may be stationary or located at a stable location and portable or can be moved from contract to contract.

There are several types of plants, including batch plants, continuous mix plants, counter flow drum plant, double barrel drum plants and parallel flow drum plants are some example to name a few. Generally, though the bulk of plants may be classify as either a batch plant or a drum mix plant.

In the batch type mixing plant, the hot aggregate and binder are added in the known amounts so that it makes up one batch. After mixing, the hot mix asphalt is release from the pug mill in one batch. In the drum type mixing plant, the aggregate is first dried then heated followed by mixing with the binder in the drum. In any case of the type of asphalt mixing plant, the fundamental reason is basically the same. The purpose is to make hot mix asphalt including the proportions of binder and aggregate that will meet all of the specification requirements.