Mobile Asphalt Plant (Batch Type)

The CONSTMACH Mobile Asphalt Plant (Batch Type) is a relocatable hot-mix asphalt facility that produces graded asphalt mixtures in discrete batches. It is part of the Asphalt Plant product group and is built on a modular, road-transportable chassis so that the entire plant can be moved from one project site to another. This makes it well suited to road construction and infrastructure works where the point of production follows the project, such as long highway sections or sites that are used for a defined period before the plant is relocated.

As a batch-type (tower) plant, it produces asphalt in a precisely controlled cycle rather than in a continuous stream. Cold aggregate of different sizes is held in cold-feed bins and metered onto a feed conveyor. The aggregate passes through a rotary dryer drum, where a burner heats it and drives off moisture. The dried, heated aggregate is lifted by a hot elevator to the top of the tower, where a multi-deck vibrating screen separates it into size fractions that are held in hot-aggregate storage bins.

The batching sequence then takes place in the tower. For each batch, aggregate is drawn from the hot bins into a weigh hopper and weighed by fraction; mineral filler from the filler silo and hot bitumen from the bitumen system are weighed separately. All components are then discharged into a twin-shaft pugmill mixer, which blends them into a homogeneous hot mix in a short mixing cycle before the finished batch is released. This batch principle allows the recipe, including aggregate gradation, filler content, and bitumen ratio, to be changed between batches so the plant can produce different asphalt types without changing equipment.

The finished asphalt is discharged to a storage silo or directly to trucks for transport to the paving site. Supporting systems include the bitumen tanks and heating, the mineral-filler supply, and a dust-collection (baghouse) system that captures fines from the dryer exhaust and returns them to the process or to a reject silo. A control system coordinates feeding, drying, screening, weighing, and mixing, monitors mix temperature and proportions, and enables consistent production from a compact operating crew.

The mobility of the plant is its defining characteristic. The dryer, tower, mixer, bitumen, and filler systems are arranged on modular, wheeled or skid-mounted units that can be transported by road and erected with minimal site preparation, often without extensive foundations. This significantly shortens installation and relocation time compared with a fully fixed plant, allowing the same asset to serve successive projects. CONSTMACH offers batch-type asphalt plants across a range of hourly capacities; the mobile units are sized to balance transportability with production output, and a representative mobile model produces on the order of 120 tons of hot mix per hour.

Core components include the cold-feed bins and feeder, the rotary dryer drum and burner, the hot elevator, the screening unit and hot-aggregate bins, the weigh hoppers for aggregate, filler, and bitumen, the twin-shaft pugmill mixer, the bitumen tanks and heating system, the mineral-filler silo, the dust-collection system, and the hot-mix storage silo, all integrated on the mobile chassis with the control cabin.

Within an asphalt production operation, the Mobile Asphalt Plant (Batch Type) provides the same controlled, recipe-driven hot-mix production as a stationary plant while adding the ability to follow the work. It is intended for producers who need accurate batch control and the flexibility to relocate the plant as projects change location.