Asphalt concrete price asphalt concrete mixing equipment

In order to improve the safe and comfortable high-speed traffic of vehicles on the expressway, asphalt concrete has become the first choice of pavement materials. What are its advantages?

Asphalt concrete has gradually shown its advantages in friction coefficient. The research results show that the anti-skid performance of asphalt pavement is composed of the microstructure and macro structure of pavement structure. Among them, the macro structure comes from the mixture ratio of asphalt mixture, which is mainly determined by the thickness and gradation form of aggregate. "

Asphalt concrete? Concrete, commonly known as asphalt concrete, is a mixture made by artificially selecting mineral aggregates (crushed stone or gravel, stone chips or sand, mineral powder, etc.). ) mixed with a certain proportion of road asphalt materials under strict control conditions.

Number one? Asphalt concrete price

10cm asphalt pavement per m2 120- 130? 750-800 asphalt per cubic meter (1000-2000)

How much is the unit price of 6cm asphalt concrete pavement?

According to the 6cm thick mechanical paving, the comprehensive unit price analysis is as follows:

1, labor cost, 2 yuan/m2;

2. Material cost (including main materials and auxiliary materials), 86 yuan/m2;

3. Mechanical fee, 2 yuan/m2;

4. Other safety and civilized construction measures, fees and taxes, etc. : 7 yuan/m2; The above total is about: 97 yuan/㎡. The price of commercial asphalt concrete is 1400 yuan /m3.

Second,? Asphalt concrete price mixing equipment

Application technology of asphalt concrete mixing equipment

According to the production process, it is divided into intermittent and continuous. Function: Preliminary test of aggregate. Batching, heating and drying. Screening and measurement; Asphalt? Heating, insulation and transportation? Measurement; Packaging and transportation? Measurement; Will it be measured? Aggregate, asphalt, filler? Mix evenly into a certain amount? Temperature of finished product.

Specific requirements for the selection of asphalt mixture mixing equipment include:

1. Performance requirements of the whole machine

1) The production capacity meets the requirements appropriately;

2) The gradation composition of mixed asphalt mixture should meet the requirements;

3) The allowable error of stone ratio is within 0.3%;

4) Wet mixing time should not exceed the requirements (generally not more than 30s). The aggregate temperature in the container is as high as 170℃, and asphalt is sprayed in the form of film. At the same time, the contact area with air increases, which is related to heating, transportation and storage. Compared with the process of heat preservation and temperature rise, asphalt ages fastest in the mixer? Fastest;

5) Must be equipped with a secondary dust collector that meets the requirements of environmental protection;

6) When the water content of aggregate is 5% and the discharging temperature is 130℃ ~ 160℃, mix the mixture? The equipment can work at rated production rate.

2. Overall composition

1)? The quantity of cold storage should meet the requirements of mixture ratio, and can be used for primary grading and? Measure.

2)? Main burner. Require large air-oil ratio, convenient adjustment, reliable operation and easy ignition? Atomization is rapid, reliable, full combustion, stable flame, rapid temperature rise and low oil consumption.

3)? The aggregate heated by vibrating screen can be screened according to the design, and it is required to be fully enclosed. Double vibration motors replace eccentric shaft vibration, and each layer of screen is easy to assemble quickly.

4)? Drying drum. The service life of the power part is not less than 6000h, is the bulge enough? Using heat, the curtains are even and smooth, and the inclination can be adjusted.

5)? Blender. The service life of the blade is not less than 3000 hours, and both sides of the blade can be used. Device for prolonging its service life; After mixing, the finished product shall be uniform and free of ash, ash and ash. Segregation, caking and other phenomena, and ensure a certain discharge temperature. Shouldn't the mixing time be? More than 30s, otherwise the permeability of asphalt in the mixer will lose too much, which is easy to age.

6)? Asphalt supply system. It is required to use heat transfer oil for thermal insulation and equipped with automatic temperature display device. Control device. ? Overall composition

7)? When the electronic weighing sensor is used for weighing, the weighing error should not exceed? 0.3%? .

8)? Main console. Generally, there should be manual, semi-automatic and full-automatic (program-controlled? ) control mode, requiring electronic computer control function (i.e.? PLC logic computer+industrial computer); Try to use it when weighing/mixing? Fully automatic control mode and print the mixing ratio and adding amount of each batch of mixture. Quantity, mixing time and daily output.

9)? Dust removal device. Must be equipped with a secondary dust collector to exhaust smoke at the chimney exit? Ringelman blackness does not exceed 2. Dust emission concentration? ≤50mg/？ M, in line with environmental protection requirements.

10)? Many systems of asphalt concrete mixing equipment should be reliable and cooperative. Uniform mixing and stable mixing quality can realize safe and efficient production.

Third,? asphalt concrete pavement

Is cement pavement better or asphalt pavement better? This is a long-debated issue. It should be said that the two pavements have their own advantages and disadvantages and will coexist for a long time.

From the comparison of pavement quality, the asphalt pavement is flat and has high driving comfort; The smoothness of cement pavement is relatively poor, but the construction of modern cement pavement paving equipment can ensure the smoothness of cement pavement and pave roads with high quality pavement.

From the comparison of pavement life, the asphalt pavement has the disadvantages of aging and poor water resistance, and the design life is 15 years; The design life of cement pavement is 30 years. At present, the design life of two kinds of pavements in China is difficult to reach, and it is very common to start maintenance within one or two years, which is generally related to the low construction quality and overweight phenomenon. For roads with heavy traffic and steep slopes, the advantages of cement pavement are obvious.

Compared with road maintenance, asphalt pavement is easy to maintain, and traffic can be opened immediately after maintenance; The maintenance of concrete pavement is troublesome, so it is impossible to open the traffic immediately.

From the perspective of cost comparison, at present, oil prices remain high. For high-grade highways (above Grade II), there is little difference between the two pavements. However, in terms of cost/life ratio (life cost), cement pavement is dominant, but "life cost" has not been used in design decision in China.

Present situation: The highway is mainly asphalt pavement, accounting for about 90%. In China, low-grade highways are mainly paved with cement, which is closely related to the high cement output, abundant local cement resources and low cement prices in China.

At present, the mainstream of asphalt concrete is put into pavement, and I believe it will be put into a wider field in the future. Let's look forward to it. ...

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