Today we are going to touch on a very important issue, the vibrating of the concrete at the moment of pouring, so that we vibrate the concrete? concrete I do not have a correct consolidation.

The vibrator must enter vertically, what do I mean, a vibrator must not enter diagonally, nor horizontally, for example in a formwork of a beam, the vibrator should enter vertically, not diagonally because when entering the vibrator, it has a radius of action, that is, this vibrates and helps to rearrange the concrete particles.

If it enters diagonally, it will leave volumes or spaces without vibrating, and the crabeater will be generated because the vibrator is not arriving, on the other hand, if we work vertically we make sure that the radius of action is everywhere and accommodates the particles, avoiding the crabeater is the corners.

In vibrating it is better to consider placing a short time in many points, let me explain, we enter it and hold 1, 2, 3 and 4 seconds and go to another continuous or adjacent point, it is better to do several points for a short time, than few points and long time; If on a slab for example, we place the vibrator and I stay a long time and then I go to another distant point, because I think that area vibrates for a long time, and what happens in that area is the phenomenon that causes the extreme vibration that is segregation. Segregation is caused by extreme vibration, as it vibrates too much it begins to densify and by this I mean that the coarse aggregate as it is denser begins to be stored in the lower part and the cement paste begins to settle in the lower part. up, which is going to make you think that the top is spectacular because it looks nice and uniform, but when you remove the form, you are going to see pure thick aggregate and that is going to be worse than if you had not incorporated a vibrate.

In vibrating, it is a matter of reaching the core of the element, that is, trying to reach the bottom of the formwork, without touching or hitting the formwork, because sometimes in some works it happens that the wooden or metal formwork is struck and this is moves, then the formwork is destabilized and the concrete can begin to come out through the corners, then the Vibration must reach a distance of 2.5 cm more or less before the formwork but must reach the lower part of the element.

Another very important point is to remove the vibrator slowly, it does not mean that I place the vibrator on the beam quite strongly and immediately take it out and start vibrating at another point aggressively, that cannot be, because a vacuum is generated or hollow and we did not let it rearrange and fill the part that was occupying the vibrator with material.

Another point also when we are going to vibrate the concrete is not to run the steel reinforcement, since it can run to one side and not remain centered, many times with the vibrator we hit the stirrup or we hit the steel, the longitudinal rods and that is incorrect , because we can move the studs that we should have placed there to generate the coating.

Another recommendation, suppose that the concrete is being poured into a column and concrete has run out or a moment, a minute, two minutes or five minutes passes for any reason, we are bringing the cement, the issue with the ready-mix pump, it can take many things, then when the emptying is resumed, a part of the already vibrated volume is vibrated again so that the "phase" that can be generated there for a long time is broken, the vibrator can be incorporated from 10 to 15 centimeters between the concrete that we are making fresh and the one that was for a while, in this way the two masses of concrete the "old" and the "new" are incorporated. One last recommendation is important to use vibrators that we can lift, because there are people who extract a very long and very heavy vibrator on site, because it is very heavy the operator drags the vibrator across the slab and that is incorrect, the vibrator is lifted perpendicular to the plane of the slab, you take a point and incorporate it to another point, it never creeps because dragging what you are doing is generating sedimentation of the aggregate and that can be worse than not vibrating.
Well, dear readers, to avoid errors like the one above, use the information provided, I hope it is useful and that you apply it in your works, you can leave me any questions in the comments, thank you for your attention, thank you.