With the comprehensive popularization of thin-layer pavement technology such as road maintenance engineering, new rural highway construction, micro-surfacing and slurry sealing layer in China, the short board of hot mix asphalt with high temperature energy consumption and limited construction window period becomes increasingly prominent, and asphalt emulsification equipment becomes the core supporting equipment for lightweight construction and green maintenance of roads.Emulsified asphalt is a liquid asphalt emulsion which can be constructed at normal temperature by shearing and fusing matrix asphalt, water and emulsifier at high speed in equipment, completely changing the operation mode of traditional hot asphalt depending on high temperature heating.A set of asphalt emulsification equipment with perfect performance has multiple advantages such as energy saving, environmental protection, low cost and wide adaptation scenarios. The following systematically combs its core competitiveness.
Construction at normal temperature, greatly relaxing construction season restrictions
Traditional hot mix asphalt must be heated to more than 150℃ before paving, mixture rapid cooling failure in low temperature environment, only warm season construction.
The emulsified asphalt produced by asphalt emulsification equipment can be mixed and spread at normal temperature, and can be operated at an environment above 5℃. Road repair and sealing construction can be carried out in spring and autumn and early winter, effectively extending the construction cycle of the whole year, making full use of the short construction window period, especially suitable for road maintenance projects in high altitude, cold northern areas and mountainous countries in Central Asia.
The aggregate is not required to be heated continuously in the construction process, only a small amount of preheating is required, and the scattered repair works in low temperature mountainous areas and remote villages are not restricted by temperature.
Energy saving, significantly reducing fuel and operating costs
Dramatically reduce heating energy consumption
The hot mixing process needs to continuously burn fuel to dry, heat sand and asphalt, and the fuel consumption is large; the emulsified asphalt only needs to preheat the asphalt and aqueous solution slightly, and the overall fuel consumption can be reduced by more than 60%. The long-term large-scale maintenance project can save huge fuel expenses.
Higher utilization of raw materials
Emulsified asphalt has excellent permeability, slurry seal layer, micro-surface construction asphalt consumption than ordinary hot asphalt thin layer construction save 20%~30%, the same pavement area consumes less matrix asphalt, reduce the procurement cost of main materials.
Lower installed power
Small and medium-sized asphalt emulsification equipment machine power is much lower than the large intermittent asphalt mixing station, mountain site small generator can drive, no need to support high-power power supply facilities, remote site power supply input is less.
Green environmental protection, reduce exhaust dust and high temperature safety hazards
Traditional hot asphalt production and spreading will produce a lot of asphalt smoke, pungent volatiles, high temperature combustion exhaust gas pollution air, at the same time high temperature hot oil has scald, fire risk.
Significant reduction in flue gas emissions
During the whole process of emulsification production, asphalt does not need to be melted at ultra-high temperature, the volatile amount of light components of asphalt is reduced sharply, there is no strong pungent oil smoke on the construction site, which meets the environmental protection emission standards of various countries, and the construction of urban roads and scenic spots roads is not subject to environmental protection control.
Less dust pollution
Slurry sealing layer and pit repair adopt cold mixing emulsification process, without large-scale drying aggregate, reducing a large amount of dust generated by drying process from the source and reducing dust removal equipment investment.
Construction safety enhancement
Abandon the transfer and mixing procedures of high temperature asphalt above 160℃, avoid safety accidents such as leakage, scald and fire of high temperature asphalt, and it is safer to repair small equipment by single person in the field.
Flexible formula, suitable for all kinds of pavement maintenance technology
The high-performance asphalt emulsification equipment is equipped with independent precise metering systems for emulsifier, asphalt, water and modifier, which can switch multiple emulsion formulas with one click to meet the needs of different road processes:
Cationic slow-cracking emulsion: used for slurry sealing layer, rural road surface;
Medium crack emulsified asphalt: pit cold repair, gravel seal;
Fast-cracking modified emulsified asphalt: micro-surfacing, ultra-thin wearing course, preventive maintenance of high-grade highway;
Modified emulsified asphalt: SBS latex is added to produce high viscosity and high toughness emulsion, which is suitable for heavy duty national highway and cross-border highway surface construction.
The equipment metering system has high precision, stable oil, water and emulsifier ratio, strong emulsion storage stability, long-term storage without layering, and ensures uniform pavement construction quality everywhere.
Modular portable design for small, scattered mountain sites
Mainstream asphalt emulsification equipment adopts integrated modular structure, which is divided into two categories: fixed large-scale unit and mobile vehicle-mounted emulsification equipment, and adapts to different working conditions:
Mobile vehicle integration: tank, shear mill, metering control system are all integrated on the chassis, no need to disassemble, rural scattered pit repair, road sealing along the line can be produced with the walk, no need to fix the factory area.
Split modular unit: large equipment can be disassembled and transported, suitable for mountainous and cross-border remote construction sites such as Kyrgyzstan, and installation and commissioning can be completed in narrow sites;
Small area: Compared with large asphalt mixing plant, emulsification equipment occupies only one third of the land, small station, temporary maintenance base can be placed.
Convenient construction, lower labor and transportation costs
Simplifying construction procedures
Cold mix emulsified mixture does not require centralized production in large asphalt mixing stations. Emulsion is produced on-site and mixed and paved on-site, eliminating the need for long-distance insulated transportation of hot mix materials and avoiding asphalt cooling and segregation losses caused by long-distance transportation.
Less manpower
Small mobile emulsification equipment only needs 1~2 operators to complete production and discharge, which greatly reduces labor compensation expenses compared with the whole team of hot mixing station, suitable for small and medium-sized maintenance units and overseas small engineering teams.
High repair efficiency
For road cracks and small pits, it can produce cold repair emulsion mixture immediately, which can be opened to traffic immediately without long-term traffic closure and reduce economic losses caused by road traffic control.
Strong compatibility, can be matched with renewable materials to achieve resource recycling
Asphalt emulsification equipment can be directly matched with old pavement milling RAP recycled aggregate to produce cold recycled mixture. Old pavement waste can be mixed with emulsified asphalt without heating, realizing 100% recycling of waste asphalt pavement.
On the one hand, it greatly reduces the exploitation of new crushed stone and protects the ecology; on the other hand, it greatly reduces the procurement cost of raw materials for road maintenance, which conforms to the low-carbon development policies of infrastructure construction of various countries and is also the core scheme for cost reduction and efficiency improvement of long-term road maintenance projects.
epilogue
Comprehensively speaking, asphalt emulsification equipment relies on the five core advantages of normal temperature construction, energy conservation and environmental protection, low cost, flexibility and portability, and is compatible with recycled materials. It is perfectly suitable for rural roads, urban preventive maintenance, micro-surfacing of cross-border mountain roads, cold recycling reconstruction and other projects.
In areas where it is cold, the construction window is short, and the sites are scattered, its value far exceeds that of traditional hot-mix asphalt equipment; when combined with the modifier module, it can also meet high-level heavy-duty road construction standards, taking into account short-term repairs and long-term large-scale maintenance. It is an indispensable core equipment for modern green road infrastructure.
