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Fine aggregates can be divided into river sand, sea sand, mountain sand and artificial crushed sand according to their sources. The concrete using the former has better pumpability; the artificial sand has a rough surface and poor sand shape, so it is necessary to add some natural sand to improve its proportioning properties, but the artificial sand has better water retention, which can reduce the bleeding and segregation of concrete.

Requirements for Concrete Aggregate Conveying by Fine Stone Concrete Pump

2. Coarse aggregate

Pumped concrete can be made of pebbles, crushed stone or a combination of pebbles and crushed stone.

The laying of the delivery pipe of the pumping wet spray trolley First, whether the laying of the pipeline reasonably affects the construction efficiency and quality of the pumped concrete. The pumping pipeline generally follows the "principle of short straight line between two points", and reduces pipe bends to a great extent. And the utilization rate of the hose, when using the elbow, try to avoid the bending of the elbow is too large.

If the pressure of the concrete pump is too high and unstable, and the oil temperature rises. When the conveying pipe vibrates obviously and the pumping is difficult, it is not allowed to pump forcibly, and the cause should be immediately identified and eliminated. The delivery pipe can be bent first by hitting it with a mallet. Conical pipes, etc., and pump at a slow speed or reverse pump to prevent clogging.

. Concrete pump is a very commonly used concrete pump at present, and has been widely used by major construction units. In the construction process, according to the different engineering conditions and construction environment, users usually use different forms of small concrete delivery pumps.

This scheme has the advantages of simple construction and low construction cost, but the pumping pressure of this scheme is too high, which is easy to cause leakage, leading to many problems such as concrete segregation and pipe blockage. The requirements are extremely high; at the same time, once the project is completed, the pump is not economical for other general projects.

The pumped concrete should meet the pumpability requirements, and if necessary, the mix ratio of the pumped concrete should be determined through test pumping.

1. Straight line laying of pipelines: In the process of laying concrete pump pipelines, it is generally necessary to ensure that the pipeline laying lines and pouring points of the pumping equipment are straight, and the bending degree is minimized. At the same time, the laying of the concrete pump pipeline support and the fixing of the pipeline must be tight and reliable, the pipeline joints should be kept sealed and reliable, and the hose and the steel pipe should not be mixed together.

The strict use requirements of the wet spraying machine for mining need to be known so that the safety of users and the service life of the machine can be guaranteed.

What number of pals know that crawler excavators do no longer have a guidance wheel? so why do excavators in the marketplace have guidance wheels, and a few do now not? so nowadays xiaobian brings the answer to make a simple summary for friends. permit's now not communicate much nonsense. allow's begin state-of-the-art precis, it is still the vintage rule. if you have any questions in the system of our summary, we can communicate and discuss at any time.

Time flies, the annual vacation is about to start, and the maintenance of the hydraulic concrete placing boom machine must be done well before the holiday.
1. Maintenance of mechanical system.
1. Check whether the connecting bolts, shaft end clamps, pins, and nuts for locking the hydraulic placing boom are loose.
2. Check whether the cotter pin of the cloth machine falls off.

Hydraulic placing boom machine is a kind of terminal equipment used with concrete pump, which is suitable for the construction of high-rise buildings and large-area concrete pouring projects, which improves the quality and construction progress of concrete pouring. However, what type of hydraulic placing boom machine should be used under special construction conditions?

After working for a period of time, everyone will choose a place for vacation. Concrete wet spraying machine is a commonly used concrete wet spraying equipment. After many times of construction, it also needs to be maintained. The cured concrete wet spraying machine can not only help improve construction efficiency and shorten the construction period, but also greatly reduce the labor cost of construction.

The wet spraying machine adopts hydraulic transmission, pumping the concrete to a certain distance or to the nozzle, and then sprays the concrete onto the supporting surface with compressed air. At the same time, add an appropriate amount of accelerator to mix with the concrete at the nozzle to accelerate curing The dosage of the agent is adjusted by the metering pump.

1. Straight-line laying of pipelines: In the process of laying concrete pump pipelines, it is generally necessary to ensure that the pipeline laying lines and pouring points of the pumping equipment are straight, and the curvature is minimized as much as possible. At the same time, the laying of the concrete pump pipe support and the fixing of the pipe must be tight and reliable, and the pipe joints should be sealed and reliable, and the hose and steel pipe should not be mixed together.

1. Concrete placing booms Operators need to go through relevant technical learning and training, carefully read the operating instructions, be familiar with the working principle of the cloth machine, master the working essentials, and be in good health. They can only work after passing the inspection.

1. When the wind speed exceeds level 6, the concrete placing boom is strictly prohibited from working. When the wind speed exceeds level 4, disassembly and assembly of the concrete distributor is strictly prohibited.
2. The placing boom should keep a certain distance from the high-voltage wire relay.

Mobile & walking
The mobile hydraulic distributing machine is composed of distributing placing boom assembly, swivel support, tower body, underframe, concrete pipeline, hydraulic system, electrical system and other components.

With the continuous emergence of high-rise buildings, problems such as high wind load and high pumping have brought great difficulties to the construction of high-rise structures. Among them, the construction of concrete placing boom is a big problem.

The fine-stone concrete pump is a special type of concrete pump. This concrete pump is widely used in floor heating projects and floor construction, so it is welcomed by the majority of construction parties. So on the construction site, what are the pumping requirements of the fine stone concrete pump? Now let’s take a closer look.

In the concrete pumping construction operation, once the pipe blockage occurs, the slight blockage can be dredged by repeated forward and reverse pumps and tapping with a wooden hammer. Serious blockage may need to be removed and replaced. Therefore, prevention of pipe blockage is particularly important.

Concrete pumping equipment

Causes of blocked pipes
With the rapid development of building construction, concrete pumping equipment concrete placing boom has been widely used by construction units. However, in the concrete pouring operation, due to improper use, the phenomenon of equipment pipe blockage occurs from time to time, which not only affects the project progress, but also directly affects the project quality.

The hydraulic concrete placing boom is a kind of terminal equipment used in conjunction with the concrete pump. It is suitable for the construction of high-rise buildings and large-area concrete pouring projects. It can easily and efficiently transport the concrete to the pouring operation point, realize continuous and uniform distribution, and reduce construction costs. Improve the quality of concrete pouring and construction progress.

It is inevitable that there will be some failures when using backhoe loader to be busy for construction. Today we are explaining what is the reason for the failure of the boom.

The extensive use of backhoe loader not only saves man power and material resources, but also greatly improves work efficiency. Let’s take a look at the working principle of backhoe loader:

1 The main personnel involved in the concrete placing booms installation and disassembly must be familiar with the performance structure and characteristics of the cloth machine, skilled in technology, and have the ability to troubleshoot.
2 In the process of concrete distributor assembly and disassembly, a special person must be responsible for unified command.
3 The placing boom assembly and disassembly site should be cleaned up, and non-workers are prohibited from entering.

With the development of science and technology, the continuous expansion of the construction field, the continuous improvement of engineering construction quality requirements and the need for environmentally friendly construction, various types of wet spraying machines have emerged, including small concrete wet spraying machines, vehicle-mounted concrete wet spraying machines, and It is suitable for wet spraying concrete equipment such as concrete wet spraying trolley for large-scale projects.

In recent years, the emergence of wet spraying trolleys has solved many inconveniences in the construction process of today's projects, and has improved the efficiency of tunnel construction, coal mine construction, and slope sprayed concrete construction. The progress of China's construction machinery and equipment is largely attributed to the reform and opening up. During this period, front-end technology and foreign-funded enterprises were successively introduced.