Mini Drum Asphalt Mixing Plant, also known as Small Mobile Continuous Asphalt Mixing Plant, is a compact trailer-mounted pavement construction equipment, mainly used for on-site hot mix asphalt (HMA) production. Unlike large-scale intermittent mixing plants, it integrates aggregate drying, heating, asphalt mixing and other processes inside a single rotating drum, realizing continuous material discharge, flexible transfer and low-cost construction, which is the core equipment for small and medium-sized road maintenance, rural highway construction, and remote site construction.
The miniature drum asphalt mixing plant accurately fills the market gap of large-scale fixed mixing plant with overcapacity and high cost, while there is no suitable equipment for small-scale sporadic projects. With the core advantages of simple structure, fast installation, strong mobility, low operation and maintenance costs, it is widely used in rural road reconstruction, municipal pavement maintenance, short-distance temporary works, remote mountainous infrastructure projects, and is one of the most cost-effective mixing equipment for small and medium-sized pavement projects in 2026.
The miniature drum asphalt mixing plant adopts integrated continuous flow operation mode, which is different from the operation mode of traditional intermittent mixing plant with batch starting and stopping and intermittent discharging, and the equipment can realize continuous automation of the whole process of loading, drying, mixing and discharging, with no interruption of the production and no waiting. Relying on the highly integrated structure of the drum, the equipment has high mixing uniformity, and the output of asphalt mixture is stable and uniform in proportion, temperature and color, and the quality of the finished product is reliable. The equipment is designed for small volume construction scenarios, suitable for rural road maintenance, community pavement renovation, local spot repair, small municipal renovation and other multi-site, short-term projects, effectively solving the problem of unstable quality and low efficiency of traditional equipment for small batch construction.
The whole set of production process of the equipment is closely connected and standardized, forming a fully automatic closed-loop production system. During construction, the multi-bin batching silo delivers sand and gravel aggregates of different specifications accurately according to the preset ratios through the frequency conversion feeding system, which guarantees accurate batching and pure materials from the source. Aggregate is sent into the integrated drying and mixing drum through belt conveyor, with multi-fuel combustion system for continuous heat supply, all-round drying and dewatering of aggregate, warming up and preheating, completely removing the moisture of the material, and eliminating the quality problems of pavement peeling, cracking, and insufficient adhesion caused by mixing of wet material. At the same time, the asphalt supply system and the mineral powder system are synchronized with precise measurement and automatic feeding, which evenly conveys the asphalt and mineral powder to the inner drum, and the continuous rotation of the drum drives the materials to tumble, knead, and mix, so that the aggregates, asphalt, and mineral powder are fully fused, effectively avoiding problems of segregation and uneven mixing, and the output of qualified hot-mixed asphalt mixture is stabilized, which is finally transported to the storage silo through the tilting discharging equipment or loaded onto trucks directly, seamlessly connecting with the on-site paving operation. The final output of qualified hot-mix asphalt mixture is delivered to storage silo or loaded directly into trucks through tilting discharge equipment.
Core Components of Micro Drum Asphalt Mixing Plant
The miniature drum asphalt mixing plant adopts highly integrated design, with compact size and layout, which really realizes “small sparrow but all its vital organs are in one place”. The whole machine is equipped with a full set of standardized and modularized functional components, abandoning the traditional large-scale mixing plant cumbersome auxiliary equipment, without the need for complex infrastructure renovation and additional auxiliary devices, a single machine can independently complete the automation of asphalt mixture, large-scale mass production operations, suitable for various types of small construction sites, rural road maintenance, and sporadic engineering construction scenarios. A full set of core functional components of the equipment is fully configured, the modules work together, stable and efficient, the specific core components are as follows:
Cold Aggregate Batching Silo: The equipment comes standard with 2-4 independent separated silos, which can be used for storing sand and gravel aggregates of different particle sizes and specifications according to the construction requirements, thus eliminating the problem of mixing and cascading of different materials at the source and guaranteeing the purity of aggregate batching. Each silo is independently equipped with frequency conversion feeding mechanism, which can accurately adjust the feeding speed and discharge volume through the intelligent system, and automatically complete the quantitative delivery of various types of aggregates according to the construction parameters of the ratio, with high batching precision and good stability, which can strictly meet the requirements of the standard ratio of asphalt mixture, and lay a solid foundation for the quality of the finished mixture.
Belt conveying system: Equipped with fully automatic closed belt conveying mechanism, the overall structure is wear-resistant and durable, smooth operation, which can realize continuous, uniform speed and stable conveying of cold aggregate. The whole system starts and stops automatically and feeds materials at a uniform speed, which can accurately match the rhythm of material discharge from the batching bin and feeding of the drum, continuously supplying aggregates to the drying and mixing drum without interruption, effectively avoiding problems such as material breakage, jamming and accumulation of materials, thus guaranteeing the continuous and uninterrupted production of the whole set of equipment and greatly enhancing the efficiency of the construction work, which is suitable for the long time and mass production work demand.
Drying and mixing integrated drum: as the core working parts of the whole set of mini asphalt mixing plant, it adopts the integrated structure of drying, heating and mixing, which subverts the cumbersome process of the traditional split equipment. The customized design of wear-resistant lifting material leaves and mixing blades inside the drum can automatically complete a series of processes such as aggregate lifting, sprinkling, hot air drying, high-temperature heating, asphalt mixing, and so on, realizing the multiple functions of aggregate dewatering and drying, warming and heating, and even mixing of asphalt mixtures in one go. This component is highly integrated, reducing the intermediate transmission links, effectively reducing the incidence of equipment failure, stable operation, low failure rate, long service life, is the key to ensure the quality of the mixture mixing core.
Multi-fuel combustion system: equipped with multi-fuel energy-saving combustion system with strong versatility, compatible with a variety of commonly used industrial fuels such as diesel, natural gas, etc., adapting to the fuel supply conditions of different construction sites, the user can flexibly switch the fuel type according to the on-site resources, with strong adaptability. The system is fully combustible and has high heat conversion efficiency, which can provide a stable and uniform high-temperature heat source inside the drum, significantly reducing fuel consumption and construction energy consumption, and is both energy-saving and economical. At the same time, the combustion system runs stably, the temperature control is accurate, the fire size can be flexibly adjusted according to the production demand, and the aggregate heating temperature can be precisely controlled to ensure that the mixing temperature of the mixture reaches the standard.
Asphalt supply system: the supporting equipment carries 10-12 tons of large-capacity asphalt heat preservation storage tanks, special asphalt transfer pumps and high-precision metering devices, forming a complete automated asphalt supply system. The heat preservation tank has the function of constant temperature and heat preservation, which can effectively prevent the asphalt from solidifying and aging, and continuously maintain the best mixing state of asphalt, and protect the fluidity and performance of asphalt. The precise measuring device can accurately measure and quantitatively deliver asphalt, strictly control the proportion of asphalt injection, completely eliminate the problems of proportion deviation, too much or too little asphalt brought about by manual injection, and effectively improve the bonding strength of the asphalt mixture and the stability of the finished product quality.
Dust removal and environmental protection system: the equipment is equipped with micro-engineering special venturi wet dust collector, which is the mainstream environmental protection configuration of small asphalt mixing plant, and it can efficiently capture the dust, smoke and other pollutants generated during the production process, and complete the dust settlement and filtration through the wet purification principle, so as to effectively control the proliferation of construction dust. At the same time to support the upgrading of equipment, can be replaced as needed bag dust removal equipment to further enhance the efficiency of dust purification, dust removal effect is better, more environmentally friendly performance. The whole set of dust removal system can effectively control the construction site dust pollution, reduce exhaust emissions, fully meet the acceptance standards of environmental protection construction sites around the world, suitable for environmentally stringent construction scenarios.
Mineral powder adding system: Equipped with fully automatic quantitative mineral powder conveying and adding mechanism, according to the demand of asphalt mixture proportioning, automatic, accurate and uniform speed to complete the mineral powder conveying and feeding operations, without manual adding manually. The precise addition of the appropriate amount of mineral powder can effectively fill the gaps in the aggregate, greatly enhance the density, adhesion and waterproof and impermeable properties of the asphalt mixture, and at the same time, enhance the compressive strength of the molded pavement, abrasion resistance and structural stability, and effectively reduce the cracking of the pavement, water seepage, breakage and other diseases, to improve the quality of road construction and service life.
Hot material discharging and storage device: adopts the combination design of inclined high-efficiency discharging conveyor with 3-10 tons small buffer storage silo to form a complete system of discharging, storing and loading finished materials. The inclined discharging mechanism is fast, no accumulation of material, no blockage of material, and can quickly transport the finished asphalt mixture to the storage silo; the supporting buffer storage silo can realize the temporary storage of finished material, which effectively connects the mixing production of the equipment with the rhythm of the on-site paving construction and avoids the interruption of the production due to the waiting of the paving equipment and the intermittent construction, thus guaranteeing the continuity and high efficiency of the road paving construction.
Intelligent control system: Equipped with semi-automatic/PLC fully-automatic integrated intelligent control panel, the human-machine interface is simple and intuitive, and the operation is convenient. The system supports real-time production data monitoring, dynamically displaying parameters such as aggregate ratio, asphalt dosage, mixing temperature, equipment operation status, etc. Meanwhile, it supports one-key parameter fine-tuning and mode switching to meet the needs of different specifications of mix production. Built-in multiple equipment overload protection, fault warning, automatic shutdown protection function, can effectively avoid equipment overload, jamming, fault damage and other issues, reduce equipment loss and construction risk, the operator can be simple training to start operation, significantly reducing the threshold of manual operation and construction costs.
There are slight differences in the parameters of the same type of equipment produced by different manufacturers. The core parameters summarized in this document are applicable to the mainstream classic mini asphalt mixing plant in the industry, with a capacity of 20-30 tons/hour and 20-40 tons/hour, which can provide a reliable reference for equipment procurement and model selection. The plant has a wide range of adjustable capacity, ranging from 10-60 tons/hour, and the mainstream capacity of the standard small model is stable at 20-40 tons/hour, and it is equipped with a total installed power of 34-165 kilowatts to meet different construction output requirements.
In terms of working performance and precision, the machine realizes high efficiency and energy saving operation, with diesel or heavy oil consumption of 5.5-7.5 kg per ton of asphalt mixture. Its production temperature can be flexibly adjusted between 140°C and 180°C according to the site construction conditions to ensure the quality of the finished product. At the same time, it has high batching accuracy, aggregate measurement error of ± 1-1.5%, asphalt measurement error of ± 1%, effectively ensuring the standardization and stability of asphalt mixture ratio.
Compared with miniature intermittent mixing plant and large stationary equipment, the procurement cost of miniature drum mixing plant is greatly reduced, and the fuel consumption, fault repair and daily maintenance costs are lower. When the utilization rate of the equipment is high, the production cost of a single ton of asphalt mixture has a significant advantage, which can effectively control the overall budget of the small-scale project and improve the profitability of the project.
Flexible maneuverability, strong adaptability to the transfer site
Trailer integrated body supports rapid dismantling, cross-regional transportation, rapid commissioning on-site production, the whole set of installation cycle takes only 3-7 days. It is perfectly adapted to temporary projects with scattered construction sites, remote sites and short construction periods, and solves the pain points of large-scale equipment that are difficult to transfer, expensive and uneconomical to enter the site.
Simple operation and maintenance, low failure rate
The equipment structure is streamlined, with fewer parts and components, which greatly reduces the number of failure points. The daily maintenance process is simple and standardized, without the need for professional and technical personnel on duty, significantly reducing the probability of equipment downtime and later operation and maintenance costs, suitable for long-term use by small and medium-sized construction enterprises.
High efficiency in small project construction, no waste of capacity.
The machine can continuously discharging materials without batch waiting time, and the discharging speed perfectly matches the paving rhythm of small road surface. It completely avoids the problems of idle capacity and waste of energy consumption during the operation of large-scale mixing plant for small projects, and it can take care of the construction accuracy and economy in both directions.
In order to select adaptable and cost-effective construction equipment, enterprises should combine the actual project situation with seven core evaluation dimensions to make comprehensive judgments and achieve accurate selection, avoid resource waste and mismatch, and meet the standardized and long-term construction needs. The specific selection criteria are as follows:
The model selection should be matched with the project scale to avoid insufficient construction capacity or idle equipment. 20-40 tons/hour model is suitable for rural road maintenance and all kinds of small sporadic construction projects, while 40-60 tons/hour model is the best choice for small and medium-sized municipal supporting projects.
Determine the type of equipment according to the mobility of the construction site. For frequent cross-site construction scenarios, give priority to trailer-type mobile equipment; for long-term fixed-site construction projects, it is more suitable to choose skid-mounted fixed equipment.
Fully consider the comprehensive cost of the whole life cycle of the equipment, including the initial purchase cost and subsequent long-term operation and maintenance costs. According to the actual budget and construction needs, choose the basic version or intelligent and highly compatible version flexibly.
Match the dust removal configuration according to the local environmental protection policy. It is recommended to use upgraded baghouse dust removal equipment in urban areas and areas with strict environmental protection regulation; wet dust removal equipment can be used in construction sites in remote areas to fully meet local environmental protection construction standards.
Fully combining with the objective conditions of the site, including local aggregate moisture content, conventional fuel type and power supply conditions, choose the most suitable combustion system and power configuration to ensure stable and efficient operation of the equipment at the site.
Priority is given to regular manufacturers with complete qualification certificates and perfect after-sales service system to ensure reliable equipment warranty, timely supply of spare parts and professional on-site commissioning services, so as to eliminate subsequent operational risks.
Selection should focus on considering the expandability of equipment functions. Priority should be given to models that support subsequent functional upgrades, such as RAP regeneration, temperature mixing modification and intelligent monitoring system docking, in order to reserve upgrading space for future project iterations and expansion of construction needs.
Micro drum asphalt mixing plant is a compact continuous asphalt production plant tailored for small, temporary and decentralized pavement projects, which perfectly solves the industry pain points of high cost of large-scale mixing plant, difficult to transfer, waste of production capacity, and the lack of suitable equipment for small-scale projects.
With the core advantages of flexible mobility, simple operation, lower energy consumption, outstanding cost performance, and convenient operation and maintenance, this equipment has become the preferred equipment for rural road construction, urban pavement maintenance, and remote site construction. When purchasing and selecting the model, you only need to combine the project capacity, construction standards and site conditions.
