Forced Asphalt Mixing Plant VS Drum Type Asphalt Mixing Plant
2023-02-20
Asphalt mixing plant, can be heated cold aggregates such as sand and gravel, then mixed with additives such as liquid asphalt and mineral powder to one place and combined into a mixture with temperature up to 160-180° for laying asphalt pavement.
There are two types of common asphalt mixing plants: forced type and drum type. Forced asphalt mixing plants produce asphalt mixes in batches with short intervals between batches; drum type asphalt mixing plants are able to produce asphalt mixes continuously and without interruption. Therefore, in some countries or regions, forced type asphalt mixing plants are also called intermittent asphalt mixing plants and drum type asphalt mixing plants are also called continuous asphalt mixing plants.
How do they mix? What are the differences in the mixes they produce? Which road projects are they suitable for? What are the differences in price?
A. What are the differences between forced type and drum type asphalt mixing plant?
1. Forced asphalt mixing plant
Description
The cold aggregate is poured into the suitable graded batching hopper according to different particle sizes, and then brought to a vibrating sieve by the conveyor belt, the cold aggregate with particle size larger than 4cm is filtered out, and the other cold aggregate is sent to the drying cylinder by the inclined belt machine. After drying and heating these hot aggregates enter the elevator from the burner end. With its help, the hot aggregate reaches the vibrating screen. Depending on the size of the sieve holes, the hot aggregate is sieved into different hot bins. After precise weighing, the hot aggregates in different bins are put down to the mixing tank one by one according to the pre-set ratio, the powder is also dropped from the screw conveyor, and the heated liquid asphalt is sprayed outward by the nozzle. After mixing, one batch of finished material is produced.
2. Drum type asphalt mixing plant
Description
The drying drum of drum type asphalt mixing plant integrates drying, heating and mixing functions. The cold aggregate enters the non-stop rotating drum from the grading machine through the belt and is dried and heated first. The asphalt nozzle inside the drum continuously sprays asphalt, and the two are bonded and mixed with the rotation of the drum. This series of actions are continuously carried out in the drying drum.
2. Finished material
The difference between the finished material of forced type and drum type asphalt mixing plant
| Forced Type Asphalt Mixing Plant | Drum type asphalt mixing plant | |
| Production capacity (t/h) | 40-400 | 20-100 |
| Applicable project size | Large and medium-sized | Small |
| Applicable road surface | High-speed highway or other high-level roads | Low-level roads in townships and other areas |
Description
The capacity of forced asphalt mixing plant is usually larger and suitable for large and medium-sized projects. The finished material produced is of high quality and suitable for paving high grade roads, such as highways, etc.
The capacity of roller type asphalt mixing plant is much smaller and can only be used for small projects. Due to the lack of precise measurement, no powder is added, and the oil to stone ratio cannot be changed precisely, the finished products are of lower quality and suitable for low grade roads.
B. What are the advantages and disadvantages of forced asphalt mixing plant and drum type asphalt mixing plant?
Forced asphalt mixing plant is widely used because of the good quality of the finished material and its applicability to high-level roads; drum asphalt mixing plant has high cost performance and low investment cost, and can be applied to a large number of low-grade roads in rural areas.
| Forced asphalt mixing plant | Drum type asphalt mixing plant | |
| Advantages | Each mixing component is precisely measured and has high precision screening | Modular structure, easy to install, transport and relocate |
| Can add powder and various admixtures | Small footprint, can be used in narrow places | |
| Real-time monitoring and precise change of oil-to-rock ratio during operation | Relatively low operating costs | |
| Adopt pulse bag type dust removal technology, good environmental performance | Low investment cost, fast results, high cost performance | |
| High intelligence of control system | Particularly suitable for countries and regions that are rapidly developing rural transportation | |
| High quality of finished material | ||
| Applicable large-scale and high-grade road construction projects | ||
| Disadvantages | Large footprint, not suitable for small space | No precise metering, no sieving of aggregates |
| High initial investment | Can not add powder and various admixtures | |
| High maintenance and operation costs | Inability to monitor and precisely change the oil to stone ratio during operation | |
| Complex structure, not easy to master quickly | Simple dust removal facilities, relatively environmentally unfriendly | |
| Low quality of the finished material produced |
C. Price Comparison of Forced and Drum Type Asphalt Mixing Plant
NFLG has been established for more than 20 years and dedicated to developing and producing a full range of forced and drum type asphalt mixing plants, and has become the leader in China's road construction machinery industry. NFLG is also the director unit of the Construction Machinery Branch of China Construction Machinery Industry Association. Its products have passed not only ISO9001 and ISO14001 quality system certification, but also CE certification of EU and GOST certification of Russia, with superior quality, energy saving and environmental protection. Also because of the high cost performance, NFLG has exported more than 400 sets of asphalt mixing plants to more than 80 countries and regions.
D. How to choose forced asphalt mixing plant and drum type asphalt mixing plant?
If the project scale is large, high grade, or need to change the oil to stone ratio and add admixture during the operation, then naturally choose forced asphalt mixing plant.
If the project scale is small, the grade is low, there is no high quality requirement, and the environmental protection requirement is not high, then the drum type asphalt mixing plant is the more cost-effective choice.
Combined with the project requirements and project budget, choose customized forced or drum type asphalt mixing plant. For example, adding bag dust removal and powder to drum type asphalt mixing plant, adding recycling system and strengthening environmental protection initiatives for forced asphalt mixing plant, etc.