When you need to pump concrete

There is no minimum height for pumping concrete, the highest limit is generally about 200m, and the highest stone I know is 380m. As for whether the foundation is pumped or not, it depends on whether your mixing station and other equipment are installed. At present, the high-rise buildings are generally pumped, and the commercial mix is also pumped. Hehe.

You don't understand what pumping concrete is, to the effect that "use a high-pressure concrete pump to send concrete through a conveying pipeline to the location you need to pour", not the name of concrete, what is sent is commercial concrete. If it is on-site self-mixing concrete, then there is no need for concrete pumps, and other means of transportation, such as tower cranes, are used to transport.

The commercial mix is to the construction site, but do you want the concrete truck to be directly put on the ground, so you need to pump it to the place you want, even to the basement part to pump it over!

For construction works, if required, the concrete pumped can be pumped either to the upper floors or to the underground works. Commercial mixing can generally be pumped, as long as there is a pump.

When the concrete truck can't reach the place, you have to send it, and when the civil engineering is used to lay the floor and pour the beam, the concrete must be delivered to the place within the initial setting time of the concrete.

Adopt pumping according to your construction schedule, on-site transport machinery. There is also the construction quality exceeding the height, and the concrete will produce segregation.

Is it okay to use non-pumped foundations.

Summary. Hello, I have seen your question and am sorting out the answer, please wait a while In the project, under what circumstances is pumped concrete? When is non-pumped concrete used?

Hello, I have seen your question and am sorting out the answer, please wait a while 1When the existing construction means cannot pour concrete or cannot be compacted and concreted, pumped concrete is used, otherwise normal concrete is used. You can also consider what kind of concrete to use in terms of cost performance.

2.Pumped concrete is generally used in housing construction projects, and non-pumped concrete is generally used in municipal engineering3At present, the state stipulates that on-site mixing is not allowed for projects in the city.

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When concrete is pumped, what are the requirements for concrete.

When concrete is pumped, what are the requirements for concrete? Hello, happy to answer your <>. When the pro-concrete is pumped, what are the requirements for the concreteThe requirements for the mix ratio of the pumped concrete are as follows:

The ratio of the maximum particle size of coarse aggregate to the diameter of the conveying pipe: the pumping height is less than 50 meters, the gravel should not be greater than 1:3, and the pebble should not be greater than 1:

The pumping height is 50-100 meters, and it is advisable to be at 1:3 1:4; When the pumping height is more than 100 meters, it should be at 1:

4~1：5；Fine aggregate should be medium sand, and the sand passing through the sieve hole should not be less than 15%; The relative pressure of the mixture is not more than 40% of the water secretion S10; Concrete slump selection values for different pumping heights: the pumping height is less than 30 meters, and the slump is 100-140mm; The pumping height is 30-60 meters, and the slump is 140-160mm; The pumping height is 60-100 meters, and the slump is 160-180mm; The pumping height is more than 100 meters, and the slump is 180-200mm; The water-cement ratio should be; The sand rate is 38%-45%; The minimum cement dosage is 300kgm3.

When the concrete starts to be pumped, it should be kept running at a slow speed, and the pump pressure should not exceed 20MPa and the operation of each part should be maintained, and the pumping should be carried out at normal speed after confirming that everything is normal. When pumping concrete downward, the angle between the perpendicular line and the pipeline should not be less than 120 to prevent the concrete from being blocked due to the formation of empty sections due to the fall of its own weight. High-strength concrete should be pumped into the pump within 1 2 initial setting time, and poured before the initial setting, to maintain continuous pumping, in order to maintain the continuity of pumping, reduce the pumping speed if necessary.

If the pump is stopped for 15 minutes, the pump should be turned on every 5 minutes, and in order to prevent the concrete segregation in the hopper, the hopper agitator should be started at the same time as the reverse and forward rotation. If the pump is stopped for 45 minutes, the pump should be flushed. 1.

The joints of cast-in-place components designed according to different strength grades must follow the principle that low-grade concrete cannot flow into high-grade concrete parts during construction. The construction joints of the two types of concrete should be left in the low-strength grade component and a distance from the edge of the high-strength grade component2The concrete should meet the needs of pouring strength, ensure that the concrete pump can work continuously, and ensure that it does not know to produce cracks intermittently.

3.The conveying pipeline should be straight, the turning should be slow, and the joints should be tight. If the pipe is inclined downward, there should be a horizontal pipe with a length greater than 15m at the outlet of the pump, and the pump port should be emptied to prevent blockage caused by mixed air.

4.Before pumping, lubricate the inner wall of the conveying pipe with an appropriate amount of cement mortar of the same composition as the concrete. When the concrete is segregated or the pumping interval is expected to exceed 45 minutes, the remaining concrete in the pipe should be immediately rinsed with pressurized water or other methods.

When pumping, there should always be enough concrete in the receiving hopper to prevent the intake of air from forming a blockage. Hope mine can help you <>

Do you have any other questions?

Nowadays, we will see common items such as concrete and pumped concrete in many construction projects and construction projects. Many friends don't understand what exactly is the definition of pumped concrete? Today, let's take a look at the relevant information about pumping concrete.

To understand the definition of pumped concrete, let's first look at what a raw material like concrete is. To put it simply, concrete is a kind of raw material obtained by adding a variety of different raw materials such as sand, cementitious raw materials, stones, etc., after adding relevant admixtures, according to the ratio. Concrete is usually widely used in various construction projects and civil engineering.

As a general term for composite raw materials, concrete has won the favor of countless businesses as soon as it was launched. Because such raw materials cannot improve the durability and strength of traditional raw materials, and concrete is relatively easy to obtain due to the relevant component raw materials, the price of concrete on the market is very low, and the cost is not high. But it's really versatile.

With the progress of the times and the development of society, it is no longer a matter of manual handling and conveying concrete in the new era. Concrete pumping is now a piece of equipment that is used in many construction sites. Due to the construction equipment such as pumping concrete, it can not only help the relevant staff effectively provide construction efficiency and speed, but also have the advantages of high performance and high performance.

The definition of pumped concrete has always been a topic of concern for many people. In simple terms, it is both the name of a device and the code name of an industrial act. The so-called pumped concrete, that is, the concrete obtained by proportioning, passes through the relevant transfer pump equipment, and then transmits to the designated place.

In the process of pumping concrete, there are strict standards for both the pump and the concrete. The requirements for the phase annihilation spine in the process of pumping concrete include the following points:

1. First of all, the relevant pressure water secretion rate S10 should not exceed 40% of the specified level.

2. For the definition of pumped concrete, I believe that many friends have their own concepts. In the whole process, the relevant slump of the inlet pump should not be less than the specified 80 mm.

3. The ratio of water cement should be kept within this range.

4. For the sand rate of pumped concrete, it is usually kept at about 38% to 45%.

5. For the amount of cement used in the whole process, it should not be less than 300 kilograms per cubic meter.

As more and more people and merchants begin to pay close attention to the definition of pumped concrete and other related information, this trend has made this kind of equipment and products recognized by many users. Tuba Rabbit** will bring more knowledge and information about decoration projects and building maintenance to all friends, welcome everyone to pay attention at any time.

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To be honest, after a long time of pumping, I naturally have a little experience!

Specifically, it is necessary to look at the material, there are several materials that cannot be beaten, 1 The material that is too dry has reached the level that it will not flow. 2. Segregated material, material separated from cement slurry. 3. The over-mixed material of the admixture will scratch the wall and is easy to block. 4 There are too many stones.

There is also to avoid misunderstandings, not the thinner the material, the better it is to play, but to see the workability, generally the slump of the material is between 140-80mm, the material is wrapped better with each other, and it has fluidity. Do not add water all the time, as this will destroy the workability of the material.

There is also a mixer truck to turn quickly before the feeding, and the material is stirred, because there are mixer truck drivers who will add water or water to the construction site, and there are also those who listen to the drum in the middle, and the material feed trough will be segregated if the material is not opened.

The most important thing is to listen to the sound, to look at the pressure gauge, when to increase the pressure, when to reduce the pressure, when to return to the pump, it is very important to avoid emptying the pump (despise those who sleep while pumping, and don't know when it is empty).

Will listen to the sound of dismantling the pipe, if you have to dismantle it every time you block it, it is estimated that you will not be tired to death, and the plumber will beat you. It's hard for you to think about not blocking the tube once, so learn it.

There is also to remember to keep the material to maintain the pump, and cutting off the material is a taboo for blocking the pump!

Note: To be a one-to-two mortar Pumping cement mortar with the same mix ratio of other components outside the coarse aggregate inside the concrete The pumping speed should be slow first and then fast Pumping is necessary to pump continuously, if it must be interrupted, it cannot exceed the pumping requirements of the concrete When pumping concrete, the piston should maintain the maximum stroke of the operation, if the air is sucked in, it should be vertical and counter-pumping, and the hose should be connected to more than three meters when pumping.

Treatment of the problem of pumping concrete freezing pump in winter.

The exit temperature must be guaranteed;

The pumping time should be reasonably controlled, and the concrete should not be allowed to stay in the pump pipe for too long;

Empty the concrete when moving the pump;

Moisten the pump with hot water;

Insulation measures can be considered for pump tubing.

Not sure what exactly you're trying to ask?

Do you want to ask when to use commercial concrete and under what circumstances to use self-mixed concrete?

In the case of a large number of commercial concrete, convenient transportation and high requirements for the construction period, commercial concrete is used;

The quality of self-mixed concrete is relatively difficult to control, but if the site does not allow or the nature of the building allows, self-mixed concrete can be used.

Now in order to save labor, many non-pumped ones will also be pumped, as long as they can be pumped, this is a principle today;

The bottom plate, frame structure, large area of flooring, square, etc. are basically pumped;

Ring beams, structural columns, sporadic concrete, frames that cannot be reached without floor pumps and can only be poured by manual or tower cranes, etc.;

It is necessary to look at the pouring site flexibly;

The questioner did not ask whether it was self-mixed or commercial concrete, but whether it was pumped or non-pumped.