The difference between pumped concrete and non pumped concrete

1. From the process point of view: non-pumping or manual or mechanical transportation of concrete, while pumping concrete is the use of concrete pump to transport concrete to the construction pouring site of the foundation construction process is the same!

2. From the perspective of concrete performance: the performance requirements for pumping concrete are relatively high, and the workability of concrete (fluidity, water retention, and cohesion) is required to be better, especially the pressure water leakage rate of concrete must meet the requirements, otherwise it is easy to cause the concrete to block the pump during the pumping process; The slump of the pumped concrete.

From the perspective of the specification, it is required to be more than 120mm, but in the actual construction process, the slump of 120mm is sometimes not good to pump, which is directly related to the marking of concrete, for high-grade concrete, it may have to reach about 200mm slump to meet the pumping requirements, but it is not that the larger the slump, the better, if the slump is too large, the concrete segregation, and the same will occur to block the pump. In addition, pumping concrete is a gradation of materials.

There are certain requirements, which require a good gradation of sand and stone.

In terms of construction technology: pumping concrete is a construction process that uses a concrete pump to transport concrete to the construction pouring site; This process is not available for non-pumped concrete.

From the perspective of concrete performance: the performance requirements for pumping concrete are relatively high, and the workability of concrete (fluidity, water retention, and cohesion) is required to be better, especially the pressure water leakage rate of concrete should meet the requirements, otherwise it is easy to cause the concrete to block the pump in the pumping process; The slump of pumped concrete is 80 120mm, and the non-pumped concrete is 30 50mm.

Pumped concrete is mixed with retarder, pumping agent and other materials more than non-pumped concrete; Pumped concrete is thinner; Pumping concrete: In order to ensure the success of pumping, the particle size of the stone should be small;

Pumped concrete requires smaller particle size of crushed stone than non-pumped. Pumping is generally used in cases where construction is inconvenient or the construction conditions are poor.

In the springback procedure, there is strength compensation for pumped concrete.

Definition of pumped concrete: the slump of the concrete mixture is not less than 100mm, and the concrete of the mixture is transported through the pipeline with a concrete pump.

The commercial concrete that is not transported by concrete truck is non-pumped commercial concrete, and the general feature is that the fluidity is smaller than that of pumped concrete.

Concrete pumping refers to the use of ground pumps or commercial concrete pump trucks for pouring concrete when pouring concrete.

Non-pumping of concrete means that when pouring concrete, it is poured by tower crane lifting or manpower cart. Generally, large-area or high-height concrete is pumped concrete, and stairs or small-area concrete are generally non-pumped.

Non-pumped concrete generally refers to ordinary concrete, pumped concrete because of the need to maintain high concrete fluidity in the pipeline, there is to maintain the strength can not be reduced, under the premise of not adding more water, it is necessary to match more cement, reduce the particle size of stones, and add concrete admixtures (such as concrete water reducer, microfoam agent, composite admixture, etc.).

Pumping concrete: A concrete pump can be used to transport the concrete of the mixture through the pipeline.

Non-pumped commercial concrete is commercial concrete other than the above-mentioned concrete. The general characteristic is that the fluidity is smaller than that of pumped concrete.

In building construction, pumped concrete and non-pumped concrete are more common practices, but many people don't know about them and don't know what the difference between pumped concrete and non-pumped concrete is? What should we pay attention to in pumping concrete construction? Let's take these questions and take a look at the relevant content!

From the point of view of construction technology, pumping concrete needs to use a conveying pump to transport concrete in construction, while non-pumping does not use this process; From the performance point of view, pumping has strict requirements for concrete, while non-pumping has no requirements for concrete; From the point of view of the rebound procedure, the pumping is compensated for strength, and the non-pumping is not.

What to pay attention to in pumping concrete construction.

1. In the construction, the water-cement ratio should be strictly controlled, and the water should not be added too much, nor too little, nor can water be added to the concrete at will, so as not to affect the performance of the concrete. If there is too little water, add it gradually in batches, not too much at once.

2. When the casing and its fittings of the water-stopping ring are embedded outside the wall pipe, their position should be determined clearly and firmly fixed. The concrete around the waterproof ring should be poured densely, and there should be no problems such as vibration leakage, and between the main pipe and the casing, it must be installed according to the requirements, and it is also necessary to use waterproof sealing paste to seal tightly.

3. When blending, it is necessary to strictly control the thickness of concrete, and before pouring, it is necessary to pave a layer of 50-100 mm cement mortar on the ground to avoid problems such as holes and exposed ribs in the later stage.

4. For the formwork of the wall column, before construction, the debris in the formwork should be cleaned to avoid problems such as slag inclusion and gaps in the later stage.

5. The construction of concrete requires professional and experienced operators to operate to ensure the construction quality of pumped concrete.

The difference between pumped concrete and non-pumped concrete:

1. The construction technology is different: pumping concrete is a construction process that uses a concrete pump to transport concrete to the construction pouring site; This process is not available for non-pumped concrete.

2. Different concrete properties: the performance requirements for pumped concrete are relatively high, and the workability of concrete (fluidity, water retention, and cohesion) is required to be better, especially the pressure water leakage rate of concrete should meet the requirements, and the slump of pumped concrete is 80 120mm, and the non-pumped is 30 50mm.

3. Different materials: pumped concrete is mixed with retarder, pumping agent and other materials than non-pumped concrete;

4. The batching requirements are different: the particle size of crushed stone required for pumped concrete is smaller than that for non-pumping. Pumping concrete is generally used in situations where construction is inconvenient or the construction conditions are poor.

5. The rebound procedures are different: there is strength compensation for pumped concrete, and there is no strength compensation for non-pumped concrete.