Drum-type asphalt concrete mixing equipment was developed in the 1970s, and its characteristic is that the drying, heating and mixing of the sand and gravel materials are continuously carried out in a drum. The burner is installed in the center of the feed end of the drum and heats along the material flow. The hot asphalt liquid is sprayed into the first half of the drum, and then discharged after being self-falling mixing with the hot sand and gravel, which not only simplifies the process, but also reduces dust flying. The discharged finished products are stored in the finished product warehouse for later use. In recent years, this kind of mixing equipment has applied electronic technology and new detection instruments, which can realize production automation and strictly control the mixing ratio, ensuring the quality of the finished product.

The development tends to be large-scale; the production process is automatically controlled by a computer; the mixing process is improved, and the fuel consumption is reduced.