Can the post pouring belt be continuously poured in the construction project, and on what basis?

Post-pouring belt in construction projects.

It cannot be poured continuously.

The post-cast belt is a cast-in-place reinforced concrete structure in building construction to prevent it.

Harmful cracks that may be produced due to uneven shrinkage or uneven settlement, in accordance with the requirements of the design or construction specifications, temporary construction joints left at the corresponding positions of the foundation floor, wall and beam.

The structure is temporarily divided into several parts, and after the internal shrinkage of the components, the concrete of the construction joint is poured after a certain period of time, and the structure is connected into a whole.

There are two types of post-pouring belts: settlement post-pouring belts and telescopic post-pouring belts: to solve high-rise buildings.

The post-pouring construction zone set up by the settlement difference between the main building and the podium is called the settlement post-pouring zone. In order to prevent the construction area from being too large, the structure is due to temperature changes, and the concrete shrinkage and cracking are set up as the expansion and post-pouring belt.

The pouring belt after settlement should be poured after the main structure project is completed and the settlement of the building is basically stable. Generally, it is poured 14 days after the completion of the main structure.

The telescopic post-pouring belt should be poured 60 days after the original concrete has been poured, because the hardening shrinkage of the concrete is completed after 60 days of concrete pouring.

The post-pouring belt of the construction project can not be continuously poured, and the classification of the post-pouring belt is: 1. It is used to solve the difference between the high-rise main body and the low-rise podium, which is called the post-pouring settlement zone. It must be poured after the completion of the main structure 2, used to solve the shrinkage deformation of reinforced concrete, called the post-pouring shrinkage zone 3, used to solve the concrete temperature stress, called the post-pouring temperature zone.

To prime at a lower temperature. Therefore, the post-pouring belt generally cannot be poured continuously.

28 days after the end of the general main project, the pouring settlement beganPost-pouring tape；60 days after the concrete on both sides is formed, it can be poured after shrinkage pouring belt.

The re-pouring time of post-pouring concrete is not less than 14 days, some are not less than 42 days, some are not less than 60 days, and some are 28 days after the capping. "High-rise building.

The Technical Specification for Concrete Structures (JGJ3-2010) stipulates that it is poured after 45 days. The third edition of the Concrete Structure Construction Handbook China Architecture & Building Press stipulates that it is 28 days.

Hello dear, here is the reason why you can find out that the post-pouring belt is a temporary construction joint set up in order to overcome harmful cracks due to temperature, shrinkage and settlement during the construction of cast-in-place concrete structures. The joint needs to be retained for a period of time according to the design requirements before pouring, and the setting distance of the pouring belt after connecting the whole structure into a whole should be determined by calculation under the condition of considering the effective reduction of temperature difference and shrinkage stress. Under normal construction conditions, the general spacing is 30 50m, and after taking special measures, it can be increased appropriately.

The retention time of the post-pouring belt should be determined according to the design, if there is no design requirement, it is generally retained for at least 28 days. The width of the post-pouring belt is generally 70 200cm, and the steel bars in the post-pouring belt should be well protected. Before the construction of the post-pouring belt, the entire concrete surface must be treated in accordance with the requirements of the construction joint.

The concrete filled with the post-pouring belt can be made of micro-expansion or low-shrinkage concrete, and the concrete strength grade should be increased by one level compared with the original structural concrete strength grade, and the wet curing must be maintained for more than 14 days.

Generally, the post-pouring belt is divided into telescopic post-pouring belt and settlement post-pouring belt, and the triangular post-pouring belt is generally poured in the concrete after the shrinkage is basically stable, and it can only be carried out after 60 days after the pouring is completed.

It depends on what is the nature of the post-pouring belt on your project, and the general drawings have a description of the time of post-pouring belt construction, if there is no explanation, according to the following time processing (construction):

If it is a post-settlement pouring belt: it is necessary to wait for the main structure to be completed (no longer loaded on the structure) and the settlement is stable before construction.

If it is a shrinkage (temperature) post-pouring belt: only 60 days after the concrete on both sides is formed, it can be constructed.

Now the reinforcing belt is mostly used instead of the post-construction pouring belt. The general design of the pouring belt after settlement is given, and there are those that are capped for 28 days and poured after 42 days.

If it is poured after construction, that is, 60 days after the pouring of concrete on both sides, if it is poured after settlement, it needs to be poured after the main structure is completed.

Pouring belt after settlement: pouring is carried out after the main structure is completed and the settlement is stable.

Pouring belt after shrinkage: The concrete on both sides can be poured 60 days after molding.

After the construction of the construction project, the pouring time of the pouring belt should be more than half a year.

1. After the main body of the building structure is capped, according to the settlement observation record, the pouring belt can be poured and closed only after the settlement is relatively stable and confirmed by the design unit.

2. Early shrinkage post-pouring belt: It should be closed after the concrete age on both sides reaches 60 days.