Hot mix asphalt material for paving is usually a mixture of graded, high quality different sizes of aggregates which are heated and mixed with liquid bitumen in measured quantities to produce hot mix asphalt. Asphalt is a paving material made out of crushed rocks and bitumen.
Apart from the relative amounts and types of aggregate and recycled asphalt pavement used to produce hot mix asphalt, characteristics of hot mix asphalt is determined by the amount and grade of bitumen used while making the asphalt.
Hot mix asphalt production requires drying and heating of aggregates so that bitumen can be coated easily. The drying process involves drying of the aggregates in rotating, slightly inclined dryer drum equipped with a burner. Aggregate is introduced in the higher end of the drum. Interior of the drum is equipped with different types of flights that help in properly heating the aggregates and also aid in properly coating it with bitumen.
Five types of asphalt plants are:
1.Asphalt Batch Mix Plant
Asphalt batch mix plants are the most widely used type of asphalt plants. Batch mix means there is a time interval between two mixing batches. Usually, batch cycle is 40 to 45s.Asphalt batch mix plants produce high quality asphalt mixture for all grades of road pavement /rehabilitation and all sizes of asphalt production. Furthermore, they can be tailored as clients special requirements.
Liaoyuan Machinery manufactures several types of asphalt batch mix plants with capacity from 10-400t/h, including classic type–LB series, eco type–ELB series, energy efficiency type–JJW series, premium type–JNW series, mobile type–YLB series, compact type (no mixing tower)–QLB series.
2.Mobile Asphalt Plant
Mobile asphalt plants, also called portable asphalt plants, including mobile batch /drum mix asphalt plants, featuring modular structure, mobility and fast relocation. Liaoyuan Machinery have designed and manufactured 5 types and over 60 sets of mobile asphalt plants for global clients, covering mobile batch mix asphalt plant, mobile drum mix asphalt plant and mini mobile asphalt plant. Capacity ranging from 8t/h to 200t/h,clients can choose the right type according to their requirements and preferences. Liaoyuan Machinery is ready to offer cousultation for global clients.
3.Asphalt Drum Mix Plant
On Asphalt Drum Mix Plant, aggregate are continuously dried and mixed with bitumen during production, thus, it is also called continuous asphalt plant.
Asphalt drum mix plant is mainly applied to produce HMA (hot mix asphalt) or asphalt concrete for small and medium sized road pavement and rehabilitation.
4.Asphalt Recycling Plant
Asphalt recycling plant RLB series is well designed to combine reclaimed asphalt pavement (RAP), hot fresh aggregate and filler to produce new finished mixture that can be used for driveways, roadway and parking lot repairs. Optimized drying drum, high performance burner and full automatic control enable 100% RAP to be reused. Energy saving, Cost-efficient, Eco-friendly.
5.Mini Asphalt Plant
Normally, asphalt plants with capacity less than 40t/h are defined as mini asphalt plants (also called small asphalt plants). Although mini asphalt plant is both small in dimension and capacity, it has wide applications worldwide due to its smart size and low costs. A mini asphalt plant can be a batch mix (usually has no mixing tower) or drum mix.
Mini asphalt plants are mainly used for small-sized asphalt production as well as small-sized road pavement and rehabilitation projects.