How Is The Concrete Pouring Process Controlled?

The construction process of pouring concrete is very important, but often the process is easily overlooked. This is because pouring takes a long time and people are fatigued and tend to slack off. Therefore, it is very important to know the key points of pouring, as long as they are controlled. Let’s take a look at how they control the process.

  1. Before pouring concrete, calculate the concrete square volume 3 days in advance and report it to the commercial mixing station.
  2. Prepare 4 vibrators, leaving 3 for field use and 1 reserved for emergency use.
  3. Personnel arrangement: 6 people vibration (1 person to lift vibrator, 1 person vibration) concrete leveling 2 people: 2 people to collect light: tanker discharge port 1 person (responsible for the concrete in the large stones out): hold concrete discharge pipe 1 person: site coordination 1 person.
  4. Concrete truck tankers are kept rotating during transport.
  5. The first load of concrete is the same cement mortar as the original ratio (into the shear wall, preferably first in a large metal bucket or a special tool for cement mortar. Then shovel by shovel into the shear wall, about 100 mm thick, to prevent rotting).
  6. Concrete trucks must be reversed quickly for more than 20 s before dumping concrete into the ground pump truck before unloading.
  7. Concrete slump should be checked every 3 trucks. The slump should be controlled between 160mm-180mm, the location of the concrete sampling is between 1∕4-3∕4 of the tanker truck.
  8. Wet the formwork before pouring and clean up the trash.
  9. Before pouring, check whether the outer frame is set 1.5m above the finished surface of the concrete layer, and hang full of tight mesh net.
  10. Check if the crane needs to be raised
  11. Check that the ground pump tube is not touching the formwork of the slab (it must not touch the formwork, many formwork collapses are caused by the ground pump tube touching the formwork).
  12. The order of pouring is to pour the shear wall first, then the beam slab, and the stairs when the beam slab is poured halfway.
  13. Talk to the mixing plant in advance when you are about to pour the stairs. Deliver slumped concrete for pouring (the stairs are inclined, and with a large slump, the water inside the concrete will easily run away).
  14. If the shear wall and beam slab have different types of concrete, the owner and superintendent requirements are strict. Different concrete should not be mixed together. The shear wall should be poured first, and after the shear wall concrete is poured, do not vibrate with a vibrator at this time, continue to pour the shear wall concrete. Pour the concrete until it is 200mm-300mm higher than the shear wall and do not vibrate. When the concrete of the beam slab is poured up to the shear wall, vibrate the shear wall and the concrete of the beam slab together and the shear wall will be well separated. After the concrete for the shear wall is poured in one place, when the shear wall is poured in another place, the outlet of the concrete pump pipe is quickly packed with sacks. Prevent the concrete of the shear wall and the concrete of the beam slab from mixing together.How Is The Concrete Pouring Process Controlled?
  15. When the steel reinforcement at the junction of beams and columns is too dense, the tamping holes should be left when tying.
  16. The elevator shaft must be poured in a rotating manner, otherwise the formwork will easily burst.
  17. When the pouring height of shear walls and columns exceeds 2m, they must be poured and vibrated in layers, and it is strictly forbidden to finish pouring once. When the wall column with two vibrations, use 50 vibrators with pounding with vibration, with 30 or 20 vibrators or manual hammering template (two workers hammering on both sides of the wall column at the same time, from bottom to top, hammering spacing of 200mm) for the second vibration, in order to prevent surface bubbles, honeycomb, pitting surface, rotten roots.
  18. Send someone to the shear walls and wall columns around the root of the concrete acceptance of the elevation, flatness control in 3mm or less, to facilitate the later shear wall mold.
  19. The insertion range of the vibrator is 250mm, the vibrator vibrates until the surface is smooth, and there is pulp on the surface, and no bubbles emerge, that is suitable for vibration.
  20. The elevation must be controlled at the time of pouring, controlled by the 50 line and pull-through line previously struck above the shear wall.
  21. It is forbidden to add water to the tanker and it is recommended that someone be on duty next to the tanker.
  22. Pave the bridleway well in advance of pouring concrete.
  23. Reinforcement workers, carpenters and electricians must be present when concrete is being poured. Reinforcement workers: focus on the reinforcement of shear walls and beams, and do not stick to the formwork or the face of the slab when the concrete is being poured. Do not warp when pouring concrete. Especially the rebar of the floor slab, where it is anchored in the beams.

How Is The Concrete Pouring Process Controlled?

Carpenters: focus on the occurrence of running and bursting moulds. Electricians: focus on power outages.

  1. Vibration of the floor is recommended with a plate vibrator
  2. When there is a second renovation of the floor, the surface will be brushed.
  3. Cover with a film to moisturize after the hair pulling treatment.
  4. Arrange for immediate curing within 12h after the concrete has been poured. Curing at least 7 days (Curing is very important.) If the curing is not in place within the first 7 days, the strength of the concrete will hardly reach the design standard, and there is only one remedy later, which is spray curing for a month, wasting manpower and material resources).
  5. After dismantling the mold, if a small amount of local honeycomb, the phenomenon of pitting surface is found. The volume ratio of 1:3 white cement, black cement with the appropriate amount of 107 glue treatment. For larger holes, should be chiseled, watered and moistened, and then poured with a higher level of concrete than the original concrete can be.