Factors Affecting the Production Efficiency and Quality of Asphalt Mixing Plant

There are many factors affecting the production efficiency and quality of asphalt mixing plant, the following are the nine factors, such as model, number of cold silos, aggregate heating method, dust removal efficiency, asphalt storage, weighing system, mixing time, storage of finished materials, as well as intelligent monitoring.

Product model

Today’s highways are mostly more than 6 lanes in both directions, and the unit output is high, generally requiring the configuration of 5000 types, and the output can reach 350-400 tons/hour.

The number of cold silos

It generally has 6 silos, which can be more subdivided into multiple ingredients and increase the stability of the mix ratio. more details of silos for small plant, visit: https://ltasphaltplant.com/small-asphalt-plant/

Aggregate heating method

The traditional heating method is heavy oil heating. Nowadays, in order to meet the environmental protection requirements, it generally requires the use of natural gas heating, which has the advantages of environmental protection and high thermal efficiency, but the production cost is the highest. In order to save cost, many projects use high calorific value pulverized coal to heat aggregate by vaporizing and re-burning in field vaporizer, which is low cost and high efficiency, but high safety requirements. When natural gas and pulverized coal are fueled by oil, production can be increased by about 20 tons/hour.

Dust removal efficiency

each asphalt station should meet environmental protection requirement, and the bag dust is clean, which can effectively improve the stability of the mix.

Asphalt storage

The asphalt is stored in the asphalt tank on site, and the mixing device should be installed in the asphalt tank to prevent the segregation of modified asphalt. The heat transfer oil is used to heat the asphalt and heat it to the temperature that meets the design requirements, so as to ensure the fluidity, coating and stability of the asphalt.

Weighing system

Weighing system includes aggregate weighing, powder weighing, asphalt weighing, accurate weighing, small error, in order to ensure the stable and uniform performance of each pot of asphalt mixture.

Mixing time

Each pot mixing time must be fully stirred according to the mix ratio design requirements, no knot unity, no white material, no segregation, etc.

Storage of finished materials

In order to ensure continuous production, about 200 tons of insulated finished products should be configured, which can be stored in advance in the case of discontinuous transport vehicles to avoid downtime, and the start-up process of the asphalt station is complicated, and the minimum waste of 30 minutes is wasted each time. The separation of the mixture can also be reduced after the short storage of the finished product bin and then into the transport vehicle.

Intelligent monitoring

Most project factory have introduced a smart system, which can monitor each production link of the asphalt mixing plant in real time, respond to abnormal problems, which is conducive to timely discovery and solution of problems.

The Role of Secondary Structural Pump in Indoor Concrete Construction

In indoor Concrete construction, secondary structural pump (mini type Pump) is a very important equipment, it has many advantages. The following are the main advantages of secondary construction pumps in indoor concrete construction:

1. Efficient and fast: the secondary structural pump can quickly and efficiently transport concrete to the construction site. It can transport concrete to the desired location with a steady flow and high pressure, thereby improving construction efficiency. Compared with traditional manual handling or using traditional concrete pumps, secondary construction pumps can complete construction tasks faster, saving time and labor costs.

2. Flexibility: The secondary structural pump is very suitable for indoor concrete construction, especially in the case of narrow space or complex structure. Because of its compact structure and flexible operation, it can easily adapt to various construction environments. At the same time, the secondary structural pump can also be adjusted and positioned according to the needs, to ensure that the concrete can be accurately injected into the required position, improve the construction accuracy.

3. Good pumping performance: the secondary structural pump has a high pumping pressure and pumping distance. It is capable of conveying high concentrations of concrete, regardless of construction height and distance. This is especially important for high-rise buildings or indoor construction that requires long-distance pumping. At the same time, the secondary construction pump can ensure the uniformity and consistency of concrete and improve the quality of concrete.

4. Reduce human labor: The use of secondary structural pump can greatly reduce human labor. Traditional concrete construction requires a lot of manual handling and pouring, which is not only time-consuming and laborious, but also easy to waste human resources and unstable construction quality. The secondary structure pump can directly transport the concrete to the construction position, reduce the manual handling, improve the construction efficiency, and reduce the labor intensity.

5. Environmentally friendly and energy saving: secondary structural pump can reduce waste generation and energy consumption during concrete transportation. It can effectively control the flow and waste of concrete, reduce the collapse and delamination of the slurry, thus reducing the consumption of energy and materials. In addition, because the secondary construction pump can precisely control the transport of concrete, it can also reduce concrete waste and environmental pollution.

In short, the secondary structural pump has the advantages of high efficiency, fast, flexibility, good pumping performance, reducing human labor and environmental friendliness in indoor concrete construction. With the continuous progress and innovation of technology, the application prospect of secondary structural pump in indoor concrete construction will be broader. More information contact Luton Group.

What Are the Benefits of Self Loader Concrete Mixer in Tunnel Construction

Concrete self-loading mixer trucks are more and more used in various engineering constructions, especially in small and medium-sized projects. Due to the advantages of the self-loading concrete mixer truck, it has a stronger ability to open up wasteland, and it can be used in places with narrow roads and rough roads.

Concrete self-loading mixer trucks have the following advantages in tunnel construction projects:

1. Efficiency: The self mixer directly loads the raw materials into the mixing drum for mixing, which reduces the steps and time of concrete preparation and improves the construction efficiency. During the mixing process, the vehicle can move at any time to adapt to the changing needs of the construction site, avoiding the midway transportation and waiting time of materials.

2. Quality control: The self-loading mixer truck is equipped with an automatic control system, which can precisely control the proportion of concrete and the mixing time. By monitoring and adjusting the ratio of cement, aggregate, mortar and water in real time, the uniformity and stability of concrete can be ensured and the quality of concrete can be improved.

3. Reduce waste of resources: Since the self-loading mixer truck mixes on site, the amount of concrete preparation can be adjusted according to actual needs, avoiding too much or too little waste. In addition, the mixing machinery equipped on the mixer truck can fully mix the materials, reducing the possibility of slurry separation and particle accumulation, and reducing material waste.

4. It can drive in both directions, easy to move, and can climb a slope of 30 degrees under full load.

In order to ensure the quality of concrete, the following measures can be taken:

1. Select suitable raw materials: ensure that cement, aggregate, mortar and other raw materials meet relevant standards and requirements, and have good quality and stability.

2. Implement strict quality control: During the mixing process, parameters such as the ratio of concrete, mixing time and mixing speed are monitored through the automatic control system, and timely adjustments and corrections are made to ensure stable quality of concrete.

3. Carry out sufficient tests and inspections: carry out necessary tests and inspections on raw materials and finished concrete, such as strength tests, impermeability tests, etc., and observe and evaluate the appearance and slump of concrete to ensure that the concrete meets the design requirements. Require.

4. Regular maintenance and maintenance: regular maintenance and maintenance of the pan mixer truck to ensure the normal operation of the mixing machinery and control system, as well as the accuracy of related instruments.

In general, the advantages of concrete self-loading mixer trucks are to improve construction efficiency, quality control and resource utilization. The quality of concrete in tunnel construction works can be ensured through strict quality control measures.

What Should We Do For High Pressure Concrete Pump Suspended on Site

Whether the mortar is for pouring the floor or the secondary structure or the internal powder and external powder, there will be a common problem of waiting for materials in the construction of fine stone high pressure pumps.

As long as it is commercial concrete, there will be the same problem. There are many reasons for waiting for materials. One is that trucks are stuck on the road. Another is there are inadequate transporting trucks at the commercial concrete batching plant. The third one is temporary material replenishment. All these will happen to wait for materials.

Waiting time is various from as short as ten minutes to as long as three or five hours. Long waiting time will lead to blockage of the pipeline or s tube.

What should we do during this period to avoid the blockage? Common processing methods are as follow.

  1. If the situation of waiting for materials is often, we should not sign the order until the materials of the next vehicle is arrived. It can prevent the commercial mixing station from deliberately holding on to wait for materials.
  2. If unpredictabel materials occurs, the operator should pay attention to it. When a truck of material is almost finished, it is necessary to ensure that the material in the hopper of the high pressure pump is full. In this way, you can prevent the blockage caused by the lack of material.
  3. In summer, when waiting for materials, the pump machine usually runs once every 15 minutes. And it is not work until the machine runs more than three processes. In winter, it can be operated every 30 minutes.
  4. A bucket of concrete material can be pump 5 times. That means, it can last for about an hour in summer, and an hour and a half in winter.
  5. When the material in the hopper is gone, and the new material in the commerical mixing plant hasn’t arrived, what we only can do is washing the pump and the pipe, or mixing mortar by ourselves.
  6. When there is no material in the hopper, it is strictly forbidden to pump the material in the pipe back into the hopper and then pump to the pipe again. It is surely that in this way, the pipe will definitely be blocked after several times. That is because reverse pumping cannot pump back the material in the horizontal pipe at the front end of the vertical pipe. It will cause a blockage in the same place.

It is very common for fine stone ultra-high pressure concrete pumps to suspend construction due to waiting for concrete materials, but it doesn’t mean that there are no methods to solve it. In the process of waiting for materials, technicians need to make improvements according to the actual situation to avoid the pipe blockage. Also, they should pay attention to clean machines timely.

All in all, it is necessory to take actions to deal with the problem of waiting for materials to ensure the construction working process in correct condition.

What are the advantages and disadvantages of recycled asphalt concrete?

At present, the recycling technology of asphalt mixture mainly includes hot recycling and cold recycling, which have not been developed significantly due to their respective defects. Thermal regeneration has the disadvantages of high energy consumption, heavy pollution and low recovery; Cold regeneration has poor road performance for a long time, and is generally only used for the middle and lower layers.

In terms of energy consumption: traditional hot mix asphalt mixture>local geothermal recycling>plant mix cold recycling>local cold recycling.

The content of recycled materials in thermal regeneration is generally 10-30%. As the mixing is carried out under the heating state, the old asphalt mixture is fully integrated with the new aggregate and new asphalt in the mixing process, so the material performance of this mixture can reach or even exceed that of conventional asphalt concrete, and can repair the deformation, cracks and other defects of most road surfaces. However, compared with cold recycling, it will cause certain pollution to the surrounding environment. Asphalt mixing equipment is required for the production of asphalt mixture. Please click the marked link to learn more about it.

reclaimed asphalt plant
reclaimed asphalt plant

Several regeneration technologies are briefly introduced as follows:

Introduction: Recycled old asphalt pavement materials (RAP) shall be mixed with new materials by selecting appropriate mixing proportion, and some regenerants shall be added when necessary, and then new hot asphalt mixture shall be produced by intermittent or continuous plant mixing equipment. The equipment here refers to the reclaimed asphalt station.

Advantages: The plant mixed hot recycling process is easy to control, the mixture after recycling has good performance, guaranteed quality and wide application range.

Disadvantages: The old materials of asphalt pavement need to be transported back and forth, and the requirements for mixing equipment are high. At present, the amount of old materials is small, generally 20-30%.

Scope of application: The recycled asphalt mixture is applicable to the construction and maintenance of asphalt pavement of all classes of highways, and can be used for asphalt pavement and flexible base course.

2、 Asphalt pavement geothermal regeneration (surface course)

Brief introduction: The asphalt pavement shall be heated and softened by using special geothermal recycling equipment, then raked (or milled) to a certain depth, and a certain amount of new asphalt, recycling agent, new asphalt mixture, etc. shall be added to form a new hot mixed recycled asphalt mixture.

Advantages: local recycling is realized, material transfer cost is saved, and the utilization rate of raw pavement materials is high.

Disadvantages: the recycling depth is only 20-50mm, and it is difficult to control the construction quality. It is easy to produce unevenness, and its service performance is inferior to that of plant mixed hot recycled mixture.

Scope of application: The pavement has sufficient bearing capacity and only has shallow minor diseases. It is generally used for the maintenance of asphalt pavement surface of expressways and Class I and II highways.

3、 Plant mixed cold recycling of asphalt pavement (surface course material, base course material)

Introduction: mix old asphalt pavement materials with new aggregates, emulsified asphalt or foam asphalt binder, hydraulic active filler and water at normal temperature, and pave at normal temperature to form pavement structure layer.

Advantages: the plant mix cold regeneration process is easy to control, the mixture after regeneration has good performance, wide application range, low energy consumption, small pollution, and obvious emission reduction effect.

Disadvantages: It takes a long time to form the strength of the mixture, and a certain thickness of overlay is required.

Scope of application: recycling of asphalt pavement old materials of all classes of highways. The recycled asphalt pavement old materials are applicable to the middle and lower layers of asphalt pavement and flexible base course; The recycled materials of base course can be used as subbase or base course.

4、 In situ cold recycling of asphalt pavement (composite recycling of surface course, base course, surface course and base course)

Introduction: special cold recycling equipment is used for cold milling, crushing and screening of asphalt pavement on site. A certain amount of new aggregate, emulsified asphalt or foam asphalt binder, hydraulic active filler and water are mixed and paved at room temperature to form the pavement structure layer. According to different regeneration layers and thicknesses, on-site cold regeneration can be divided into on-site ground layer cold regeneration, on-site base layer cold regeneration, and full depth (surface layer and base layer composite material) cold regeneration.

Advantages: realize local recycling and save material transfer cost; Low energy consumption and pollution during construction; Wide application scope.

Disadvantages: the construction quality control is difficult; Generally, it is necessary to pave a thick pavement structure layer.

Scope of application: recycling of old asphalt pavement materials of all classes of highways. The recycled surface mixture is applicable to the middle and lower layers of asphalt pavement and flexible base course; Recycled base course or full depth recycled materials can be used as subbase or base course.

The selection of the above recycling technologies shall be comprehensively considered and selected according to the highway grade, pavement conditions, nature of maintenance works, traffic volume, construction environment, production capacity and other factors. Normally:
① Asphalt surface course materials and base course materials shall be recycled and reused separately;
② Asphalt pavement materials recovered from pavement overhaul works – plant mix recycling shall be given priority;
③ Recycled asphalt mixture for middle and lower layers – plant mix cold recycling is preferred;
④ Recycled asphalt mixture for upper layer – plant mixed hot recycling technology shall be selected;
⑤ Restoration project of pavement surface function – geothermal regeneration technology can be selected;
⑥ Recycling of base course materials – mainly choose the cold recycling technology of on-site or plant mixing.

Dairy Universe India

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The Exhibition would cover the complete need for the milk and milk products processing, packaging, storage and distribution industry.

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Lay the foundations for your dairy business in northern India by registering for Dairy Universe India and our special trade fair notes.

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