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Do the concrete industry know that HM16-D concrete mixer truck made in China in the transport process of the car body of the large pot must be kept rotating, in order to be the material in the jar mixing mixing of concrete is not solidified to ensure good quality of concrete in the construction site.

A whole load of goods will be scrapped if the concrete mixer truck does not rotate the tank for a long time. We need to clear the goods in the mixing tank in time, otherwise the consequences will be very serious. The whole concrete mixing tank may be scrapped if the mixing tank is solidified by concrete.

When it is found that high quality HM12-D concrete mixer truck does not rotate, we should analyze the reasons from the following aspects to find out the problem:

1. The oil level is too low, and the suction pipe is not placed as required to absorb oil

2. The suction pipe breaks or is squeezed to bet the match

3. The oil filter is too dirty, and the environment under the concrete mixer truck itself is not very clean. It should be cleaned regularly

4. The high pressure valve of the main pump is damaged or too dirty

5, connecting the pump shaft fracture, the meat can be seen

6. The driving motor of the HM10-D concrete mixer truck made in China rotates in the wrong direction, causing damage to the auxiliary pump

7. Release the adjusting lever and disconnect from its control

The above 7 items are the common treatment methods for checking that the concrete mixer tank does not rotate.

From the road situation, the use of LB2000 Asphalt Mixing Plant made in china is the most, which is also one of the reasons for the rapid development of asphalt mixing station. Under the situation of rapid economic development, the quality problems on the surface of asphalt pavement increase gradually, which puts forward higher and higher requirements for the use quality of asphalt. It is understood that the primary factor affecting the use of asphalt quality is the ratio of raw materials, which is also involved in the introduction of asphalt mixing station, we can discuss together.

In order to obtain high-quality asphalt products, in addition to high quality LB1500 Asphalt Mixing Plant to meet the requirements, the selection of the appropriate asphalt mixture grading type is also the most important. According to the current regulations of China, the maximum particle size of asphalt mixture in the highway upper layer should not exceed half of the thickness of the layer. The maximum aggregate particle size of the middle layer asphalt mixture should not exceed two-thirds of the thickness of the layer. And the aggregate maximum nominal size of asphalt pavement structure layer mixture should not exceed one third of the thickness of the layer.

Based on this analysis, if the asphalt surface layer with a certain thickness is selected according to the above specifications, the particle size of asphalt mixture aggregate is generally larger, which is bound to bring difficulties to the construction of low price LB1000 Asphalt Mixing Plant price. Through investigation, experiment, analysis and comparison, it is known that the selection of the lower layer is wide, so the ag-201 class can be used; It is difficult to choose the mixture type of the upper layer. In order to realize the reasonable selection of the mixture ratio, on the one hand, it is necessary to investigate the aggregate resources as much as possible, and on the other hand, it is necessary to consider the model of stirring equipment.

In order to guarantee the project quality, must strict selection and inspection of engineering materials, so choose, to determine the raw materials should be used according to the pavement structure and the requirement of quality, and conjunctively material supply situation, in accordance with the requirements of the relevant test procedures for inspection, and then optimize the material selection, make each technical indexes are in conformity with the provisions of the materials technical requirements.

What is the difference between commercial hzs50 stationary concrete batching plant made in China and engineering concrete mixing plant.

First, different uses
From the names of the engineering concrete mixing plant and the commercial concrete mixing plant, it can be seen that the two are very different. Their differences in terms of use and other aspects are as follows: Generally, the engineering concrete mixing stations mentioned are built in Next to the construction site, it is mainly used for a certain project and has a single configuration that can only meet the concrete required for the production of this project. It is mainly used to produce the main concrete of its own project.

For the purchasers of commercial concrete, they are investors who invest in buying and selling concrete and operate concrete buying and selling businesses. According to different business needs and different customer requirements, they produce concrete for the corresponding customer needs for sale. The configuration of the commercial hzs60 stationary concrete batching plant for sale is very complete, to meet the needs of many customers to a greater extent, and expand the business.

Second, different production
The engineering concrete mixing plant and the commercial concrete mixing plant are still very different in terms of manufacturing concrete:
1. The types of admixtures, the number of cement and the size of the cement bin are different. The number of engineering admixtures and cement is small, and the number of admixtures and cement silos is small.
2. Engineering concrete does not require external sealing, and the structure is simple; commercial concrete is used for external sealing, pursuing beauty and environmental protection, and large structure.
3. The price of commercial hzs90 stationary concrete batching plant made in China is relatively high.

1. Laying the first board: first locate the first board, and fix the position of the low cost Galvanized Corrugated Steel Sheet according to the layout drawing and the corresponding hole position on the purlin. The first low cost Galvanized Corrugated Steel Sheet is installed from the east side gable near the gutter, and is laid from east to west. Installed.
2. When the profiled steel plate is connected with the purlin, it is fixed by 5.5*30 self-tapping screws with waterproof gasket. The fixing point should be set on the trough, and the self-tapping screw is fixed in the valley, and the length direction is 350mm. When fixing, the manual operation is moderate, and it is not appropriate to fix the self-tapping screws too tight or too loose to prevent the formation of gaps.
3. The lap joint of the Galvanized Steel Roofing Sheet: China supply Galvanized Steel Roofing Sheet is connected by self-tapping screws, and the sealant is sealed at the joint to prevent leakage, so that the joints are tightly and smoothly engaged.
When the lap joint is made, the two pressed steel plates are lapped one by one, and the lap joint is fastened with a self-tapping screw with a waterproof rubber pad. When longitudinal lap joint is required, the two profiled steel plates are overlapped and overlapped, and the lap length is about 250 mm. After the lap joint, the self-tapping screws are used for fixing.
4. When laying the Galvanized Steel Roofing Sheet, the lap joint of the adjacent two plates should be overlapped according to the maximum frequency wind direction (the dominant wind direction is the southeast wind), which can avoid the cold air being poured into the room during windy.
5. The ridge is laid from the side of the gable. It is fixed with a 5.5*30 self-tapping screw and a purlin. The fixing of the purlin and the profiled steel plate is strict and straight.

Aluminized zinc coil, also known as aluminized steel coil. It is also called high quality galvalume steel coating steel coil or hot dip aluminized coil. Aluminized steel coil is aluminum-silicon alloy coated steel coil, in which the content of aluminum is 90%, silicon 10%. Aluminized steel coil has good heat resistance, heat reflection, and corrosion resistance, and its mechanical and physical properties are better than cold-rolled steel coil. Because of the superior performance of the aluminized steel coil, it has been widely used in our daily products. Such as car muffler, household appliances and so on.

USES for aluminized zinc coils
Car parts, thermal equipment, building materials, etc.

Aluminized zinc coil is called "hot dip aluminum coil ", which is similar to hot dip galvanized steel coil in the manufacturing process. But its heat resistance is better than galvanized steel.

Currently, only South Korean and Japanese steel mills can produce the product in Asia.

According to the different USES, in order to further enhance the corrosion resistance of materials, there are also special specification products through surface post-treatment (chromate treatment, no (hexavalent) chromate treatment).

Characteristics of aluminized zinc coil

1. High-temperature resistance: because of the specific combination of steel coil substrate and coating organization, the formation of an iron-aluminum alloy, so that the GL Galvalumed Steel Coil made in China has excellent high-temperature resistance. Extremely high reflectivity is guaranteed at 450℃. At higher than 480℃, coating appearance gray. When the temperature is up to 650℃, the protective layer to prevent the oxidation of the steel coil is still well preserved without any shedding.

2. Thermal reflection: at 480 degrees Celsius high temperature, an aluminum coil can reflect 80% of the incoming heat. Therefore, aluminized coils can be made into efficient insulation barriers or heat reflectors for high-temperature applications, which rapidly increase the temperature in the furnace through effective heat reflection.

3. Mechanical strength: at room temperature, the mechanical strength of the aluminum coil is consistent with that of the substrate. At the same temperature of 480℃, the strength of the aluminized steel coil is 10 times that of aluminum coil, so the thickness of the steel coil can be reduced by at least 30%.

4. Corrosion resistance: in the process of hot-dip plating, molten aluminum immediately react with oxygen in the air to form a layer of Al2O3 protective layer, so that the surface of the steel coil immediately passivation. This protective layer is very stable and does not dissolve in water. Even if the surface of the steel coil is scratched later, this protective layer can heal itself. Therefore, aluminum zinc steel coil in stock has strong corrosion resistance to chemical corrosion.

After China Wave Type Galvanized Corrugated Steel Sheet is finished, it has a great effect on surface quality improvement and performance improvement. There are mainly the following aspects:

1. Improve the surface flatness of the galvanized sheet. After finishing, the flatness of the galvanized sheet is improved, the wave shape of the galvanized sheet is partially eliminated, and the slag particles or other uneven spots on the surface can be flattened to make the surface of the galvanized steel sheet become Smooth and flat.

2. Adjust the roughness of the surface of Wave Type Galvanized Corrugated Steel Sheet. By controlling the roughness of the surface of the work rolls of the finishing machine, the uneven roughness of the surface of the galvanized steel sheet can be unified to a certain range. This improves the paintability of the product and the lubricity during processing.

3. Improve the surface color of the Galvanized Corrugated Steel Sheet. For small zinc flower and zinc-free flower products, the galvanized sheet can be made to have a more uniform surface with a uniform gloss. For some private enterprises, the use of large zinc flower products as color-coated substrates can make the zinc flower bumps and different glosses formed by the large zinc flower crystals smooth and uniform, which makes the zinc flowers blurred and unfavorable. Cover the zinc flower when painting.

4. Improve the processing performance of Wave Type Galvanized Corrugated Steel Sheet. By finishing, the yielding platform of the galvanized steel sheet can be eliminated or become inconspicuous, and the metal slip line can be prevented from being generated in the subsequent processing.

Application of high quality galvalume steel coating steel coil.
Architecture: roofs, walls, garages, soundproof walls, pipes, and prefab houses.
Automobile: muffler, exhaust pipe, windshield wiper accessories, fuel tank, truck box, etc.
Home appliances: refrigerator backboard, gas stove, air conditioner, electronic microwave oven, LCD frame, CRT explosion-proof belt, LED backlight, electric cabinet, etc.
Other: heat insulation cover, heat exchanger, dryer, heater, etc.

Galvalume steel coating steel coil is also known as low aluminum galvanized steel plate, the coating contains 5%Al, 95%Zn, and trace rare earth elements. The main advantages of the coating is good plasticity and adhesion, and the corrosion resistance before and after deformation is the same; And the corrosion resistance of the atmosphere is the conventional hot galvanized sheet 2~3 times and has good coating, welding, in all galvanized sheet, its toughness is very good, corrosion resistance and molding can be comparable to electro-galvanized sheet.
The coating structure of the galvalume steel coating steel coil is Al - Zn alloy, the coating composition is 55%Al, 43.3%Zn, 1.6%Si. Its surface is smooth, with excellent atmospheric corrosion resistance, then the same hot galvanized sheet 2~6 times higher. It is similar to the hot-plated aluminum plate in high-temperature corrosion resistance and can be used for a long time without any discoloration or deformation at a high temperature of 315 degrees. Water corrosion resistance is better than hot galvanized plate and hot aluminum plate, soil corrosion resistance is better than a hot galvanized plate.

Scratch resistant PPGI prepainted galvanized steel coil
As cheap PPGI prepainted galvanized steel coil machining demand is higher and higher, coating in the guarantee of good flexibility, at the same time, need to improve the coating resistance and wear resistance, the existing technology adds polyamide powder in the coating formula, react with isocyanate in coatings, forming interpenetrating network system, to improve the surface roughness and hardness of the coating.

Antibacterial PPGI prepainted galvanized steel coil
Uses in household electrical appliances, food packaging, medical utensils antibacterial coating: mainly contains Ag+, the silver ion is the most effective antibacterial agent in nature, through zeolite as a carrier, release silver ion. Invades the cell body of the bacteria on the surface of the coating, cutting off its respiration. Disadvantages: the high cost of silver; Silver ion is unstable in the zeolite.

Self-cleaning PPGI prepainted galvanized steel coil
Self-cleaning coatings are generally divided into two categories:
- surface hydrophilicity (true self-cleaning)
- hydrophobic surface (lotus leaf effect surface, easy to clean)
Hydrophilic surface coating
Add hydrophilic auxiliary agent in the coating, coating after baking, the auxiliary agent float to the surface of the paint film, hydrophilic group hydrolyzed after water, make the coating surface hydrophilic, rain easy to wash off the attached layer and achieve self-cleaning.

PPGI prepainted galvanized steel coil for cold roof
Pigment powder in the paint can selectively absorb visible light, the rest of the reflected visible light is reflected as visual color.
Cold roof paint
Same color, different pigment powder, in the infrared camera, the display is completely different.
Antistatic paint
It is used in the production environment of electronic parts, food, optical equipment, medical facilities, etc
Generally existing products: to coating antistatic auxiliaries or exposed metal surface.

A feasible method to prevent the speed of aging of the GI steel coil in advance.

GI steel coil with spangles made in China used for a long time or not used for a long time may occur aging, why to say it, long-term construction or storage will be exposed to the sun. Aging occurs after a long time of exposure to light, which we cannot avoid. However, we can prevent and reduce the aging rate in advance in ordinary times. So what should we do?

The first necessary condition for aging or photochemical reaction of PPGI corrugated roofing sheet is that the surface composition of PPGI sheet can absorb radiation energy. Secondly, the absorption of molecular radiation energy is greater than the molecular bond energy, the color coating can occur degradation. The shorter the wavelength, the higher the energy.

According to the above theory, the aging of the high quality PPGI corrugated roofing sheet in the atmospheric environment is that the coating molecules absorb the energy of the ultraviolet band in the sunlight which is higher than its molecular bond energy, leading to the degradation of the coating molecules. With the aging of the coating, the base material body is gradually lost, and the coating surface gradually becomes rough and lose light. This loss of base material eventually leaves relatively stable pigment particles in the form of an unbonded powder on the coated surface, a process known as pulverization.

To sum up, there is a big difference in the aging resistance of polyester color coating board with different coating thickness, the aging resistance of thin coating color coating board is poor, the aging resistance of normal thickness coating is relatively good.

Therefore, it is not feasible to reduce the production cost of PPGI corrugated roofing sheet by reducing the thin coating, which will inevitably bring serious quality problems.

One, the product quality of low cost PPGI prepainted galvanized steel coil is decided not only by the basic property of base material and coating, still depend on production craft and operation control technology. The operation control technology has great influence on the physical properties and surface quality of the PPGI corrugated roofing sheet products. The production control technology analysis from the production process should focus on cleaning treatment, chemical coating treatment, coating (including initial coating, fine coating), curing 4 links.

Two, PPGI prepainted galvanized steel coil production using two coating two drying production process. In order to ensure the coating quality of PPGI corrugated roofing products, it is necessary to remove oil, dust, rust and other pre-treatment work on the surface of the substrate before coating, which is the first step to ensure the coating process, but also to ensure the quality of PPGI corrugated roofing sheet products. Caitu processing purpose is to remove adhered on the surface of the base material of anti-rust oil, rusty spot, dust, etc, on the surface of the base material that cleaning chemical coating processing, form and Cr3, Cr6, + + as the basic skeleton network of chemical conversion coating, in order to increase the adhesion between substrate and coating, the durability of the base material of corrosion and coating.

Three, the quality of the work determines the quality of the coating, and directly affect the coating flexibility, impact resistance, and other physical indicators. Determines the PPGI prepainted galvanized steel coil, PPGI steel sheet product coating adhesion. The purpose of initial coating, fine coating and curing is to apply the coating to the surface of the substrate and use the heating method to make the organic solvent volatilize the coating, making the organic coating closely combine with the substrate.

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