What preparations should be made before concrete pouring?

What preparations should be made before concrete pouring? The following Zhong Da consults the bidding teacher to answer your questions for your reference.

Requirements for wall column parts:

1. Verify the position, quantity and fixation of embedded parts, reserved holes, water and electricity pipelines and boxes (slots) in the wall.

2, check the template under the mouth, the mouth of the cave and corner flat-fell seam is tight, corner column reinforcement is reliable, all kinds of connectors are firm.

3, check and clean up the template residue sundry, rinse with water. Wet the template with water at room temperature.

Beam and slab part requirements:

1, concrete layer formwork, steel bars, embedded parts and pipelines have all been installed, which meet the design requirements after inspection, and the concealment and pre-inspection procedures have been handled.

2, pouring concrete with shelves and. The concrete has been erected, the pump pipe has been laid and passed the inspection. The pipe should be straight. If the pipeline inclines downward, air should be prevented from mixing and causing blockage.

3. Remove impurities in the formwork, and water and wet the wooden formwork at the same time before pouring, so as to avoid the wooden formwork absorbing moisture in concrete and affecting the normal hardening after concrete pouring.

Requirements of commercial concrete mixing station:

1. The project department has issued a task list to the mixing station. When the task list is issued, it must include the project name, location, location and quantity, various technical requirements for concrete (strength grade, impermeability grade, retarding and special requirements), on-site construction method, production efficiency (or time limit), handover and overlapping requirements, coordination between supply and demand, etc., and be issued together with the notice of construction mixture ratio.

2. The trial operation of the mixing station equipment is normal, and the number of concrete transport vehicles meets the requirements.

3. The material supply of the mixing station is sufficient, especially the specified cement varieties have sufficient reserves or ensure continuous supply.

4. All materials of the mixing station, including cement, sand, stones, fly ash and additives, have passed the inspection and meet the use requirements.

5. There are reliable means of communication between the mixing station, pouring site and transport vehicles.

Requirements for all machines and tools:

Including concrete pump, vibrator (rod), the test run is normal, and emergency measures should be taken to ensure that manpower, material resources and materials can meet the requirements of pouring speed. On-site concrete block curing pool and block die test are ready.

Requirements for construction personnel:

According to the construction plan, the foreman will make a comprehensive technical disclosure to the operation team and implement the pouring plan. Every construction worker knows the starting point and progress direction of pouring, and the concrete pouring sequence has been approved.

Weather requirements:

Watch the weather. Concrete should not be poured in rainy days. In order to prevent accidents, there should be enough pumping equipment and rain-proof materials for construction in the changeable weather season.

For mass concrete structure concrete pouring:

Temperature monitoring measures and effective measures should be taken to prevent shrinkage cracks caused by excessive hydration heat and excessive temperature difference between inside and outside during concrete hardening, and detailed technical schemes should be formulated to guide construction.

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