Process of Making Massive Concrete Hollow Core Slab. Korean Concrete Mass Production Factory 

I work at a factory where we make the same elements, and i have to agree, this was a very nice factory. It looks pretty new also, and they have nice new equipment. In our factory alot of the equipment is pretty old.

its concrete not cement, do you call a cake or bread flour?

With my vast knowledge, and the comfort of my arm chair, I will say they’re doing it completely wrong. Needs more cow bell. 🤔

Workers understand the sounds, they are crazy 🤪 too.

Very clever, actually - diff machines or areas have different warnings, and the sound intent is clear to us yet they don't increase stress levels like standard warning horns do.

I would kick my own ass if i had to listen to this crap all day 🤣

@@Alpejohn both feet? At the same time?😳👀😳

@@galewinds7696 yep, ninja 🥷 style😂

Yes, technology is much more advanced

What do you mean with "in the past"? When did you start cutting it into requierd lenghts? I have been working in a concrete plant for 18 years now where we make these elements, and we have cut them to required size all the time, and its been done since the 1980's.

they are called post tension slabs and are still made to suit the job you can not cut these you will kill yourself

@@Alpejohn The World existed long before the 1980s.

@@MrThisIsMeToo Yes…. And?

@@to-vb6jl 그래도 다른 제조업 공장보단 단순하고 수월해서요. 제조업은 자동로봇이 곳곳에 들어가야돼서 투자및 유지하기가 더힘들어요.

В конце видно, что они потом все бетоном заливают. Чтобы он внутрь плиты попал.

Já funcionam por aqui desde década de 60's !

@@pedrocampos2965 Boa tarde, obrigada.

If i where to guess, its to make the concrete poured on top after they are put in place have a good bond. In our factory we dont do this.

The span will be concreted in later. Notice the rebar hooks next to it that will join the new concrete layer to the one below.

I had the same thought. It looks to be about 100 mm max. If you look later in the video from the drone footage, you can see workers pouring and levelling the top layer. You can also see that they have poured concrete into the holes and gaps, which explains the black plastic plugs that were inserted. Back to the 100 mm being enough, I would hope that there was rebar fed through into the ends of the beams after being placed. If there was any deviation or failure at one point, it would collapse like a house of cards. Excellent in showing the manufacturing process though.

За счет пустот , которые заливаются после монтажа, и арматур поверх плит сечение увеличивается многократно, и воспринимают все расчетные нагрузки. А монтажное опирание должно выдерживать собственный вес плиты, кстати оно армированное.

He was doing the health and safety squint. He will be fine.

Around 8:50 goggles found!

Они прищуривают глаза, этого, видимо, достаточно

если смотреть внимательно, то в конце показано бетонирование этого всего , при этом в пустоты на определенную длину загоняют бетон и возможно арматуру и получают "жесткое " соединение с ригелем и плитой

They probably put rebar into the end of the element, so it sticks out and gets casted together with the rebar sticking up from the beam they lay them on to secure it all in place. As seen at 13:40

может быть заложена некоторая подвижность конструкции... или потом стыки заливают....

рабочая технология, пар здесь не прокатит, т.к. в отличие от вашего завода, вместо арматуры трос натянутый, обусловлено тем, что бетон должен набрать марочную прочность определённую, чтобы изделие не потрескалось. У нас после пара плиты еще до набирают марку в цехах, сразу их никто не гонит на объект.

смотрел корейский же ролик про плиты перекрытич с пенопластом-утеплителем, там пар испльзуют

We can deliver up to 16-17 meter lenghts depending on the thickness of the element. 😛

5 см там точно есть, но выглядит как то ненадежно. И непонятно зачем дыры сверху пробили. Думал может для монтажа краном цеплять, но нет.

You are correct. There has to be a single slab pour to tie everything together

I can answer you in english. The plastic plugs are put there to prevent the concrete from pouring inside the element when they pour concrete between the ends on top of the beam. As you can see at 13:23 there is rebar sticking up, there will be filled with concrete. 🙂 Btw, in the factory i work, these elements can cure in about 6 hours, ready to be cut. 😛

They will add another layer of concrete next to the span and inside the ends that will lock it in place. Notice the curved rebar hooks that will join the new layer to the previous one.

There is a small fulcrum for the slab, and the fact that the concrete will be poured will not play a special role...

Distribution center

They found them at 8:50

이민자입니다

The steel reinforcement is again connected to the empty space and it crowds with the concrete. You don't know anything about construction, so that's what it looks like.

This way, you don't have to make a separate mold. When placing concrete, it eliminates the phenomena of concrete bending down due to its immense weight, increases the accuracy of its dimensions, and simplifies the structure of plumbing conduits through the spaces below; it simplifies the binding of reinforcing bars and reduces their complexity. This method is very efficient for creating a series of identical blocks that do not require special design elements such as large factories or warehouses. In addition, the load and center of gravity are pointed precisely to the floor, firmly fixed with reinforcing bars so that they are not pushed out, and after constructing several pipes below them, they are filled with concrete to form a complete structure connected together. This advantage eliminates the hassle of having to use hundreds to thousands of cradles to withstand enormous weight when placing concrete, and has the advantage of preventing it from falling below.,It is a very helpful way

You *_cannot buy it_* easily with no money.