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Functional classification, advantages and disadvantages of asphalt mixing equipment

Jul 25, 2019

Asphalt concrete mixing equipment is a mechanical device for producing various asphalt mixtures. It is suitable for engineering departments such as highways, urban roads, airports, parking lots, and freight yards.

The function of the asphalt concrete mixing equipment is to mix the aggregates and fillers of different particle sizes in a prescribed ratio, and use asphalt as a binder to mix them into a uniform mixture at a prescribed temperature.

Asphalt concrete mixing equipment is one of the key equipments for asphalt pavement construction, and its performance directly affects the quality of the paved asphalt pavement.

According to its process, asphalt concrete mixing equipment can be divided into two types: intermittent forced type and continuous drum type.

The continuous asphalt mixing equipment is also a drum mixing equipment. The process is simple and the equipment is simple. In the grading, metering and heating drying of the cold aggregate, the process is basically similar to the batch type, but the continuous type has no hot aggregate lifting, screening, secondary metering and the like. The dynamically metered cold aggregate is directly heated into the drying drum and then stirred into an asphalt mixture in a mixing drum connected thereto. Continuous feeding and discharging.

Intermittent concrete mixing equipment is an early development of conventional asphalt mixing equipment. It is to add the preliminary graded cold aggregate into the drying cylinder, heat it by drying, then lift the hot aggregate, and then sieve it by vibrating screen. It is stored in the hot silo and added to the mixing pot together with the metered filler (mine powder) and binder (asphalt). Mix the asphalt mixture evenly. He measures the ingredients, stirs and discharges in one pot and one pot, which is called intermittent mixing equipment.

Because the aggregate is subjected to secondary screening and classification, the asphalt is secondly metered, so not only the ratio of aggregates can be ensured, but also the accuracy of aggregate and asphalt is relatively high. In addition, because it is intermittent agitation, it is easy to change the aggregate gradation and the ratio of oil to stone at any time, the asphalt mixture produced is also better in performance, the quality is more assured, and the requirements for aggregate are relatively lower.