 which affects the temperature a lot, as you can see. So these two cases should be analyzed separately. And depending on the type of the concrete on the pavement, you should do separate type of analysis. And all of them are unique. Time limit is in hours. Hours. Yes. And this picture you can see because of the hidalization, which I've seen. Because of the hidalization, there is a heat release, and it affects temperature. That is, due to time, it is coming. And this is another part of analysis which is, this is the head generation. This is, if you know it, about thermodynamics, about the conductivity and the specificity of the material is changing. In terms of this, the concrete is quite interesting material, which is in early age, all the parameters, mechanical and thermal parameters, are changing. And here, you can see the planning of different. This is for indoor pavement. You can see the temperature variation from day one to day 28. If you look for the, this is the thickness. You look from surface to depth. You can see that in the first date, there is a more linear, the temperature change. And here, at the end, at the 28 days, you can see that the temperature is in equivalence. So this is the bottom temperature of the ground, and this might be the temperature of the room, for example. Then we use these results to do the humidity analysis. And here, you can see there is a relative humidity change between the first 28 days. In the surface, it is closing the room. 12% of the water or the humidity and the bottom, it is just different, just 2%, 3%. And this is the diffusivity coefficient, which is describing the velocity of the water movement in the concrete. As you can see, this parameter, depending on the humidity, depending on time, this parameter is also changing. So it was quite obvious to incorporate all this change in just one model. And here, you can see an example of the humidity. And you can see that even after 28 days, the bottom of the concrete slab is almost, there is no change in humidity. So the humidity change is very, very slow process. Any question? Actually, you showed the graphs of the hydration that it starts from zero and then it goes up again. So this hydration, you start counting for the product. Actually, it's going to be some mixture already. Yes. The concrete is mixture of water and the cement. Well, cement and aggregate. And aggregate, right? So it already has the volume of the water. Yes. Then we pour additional water on it and that is how you are talking about the humidity. No, when you do the mix, you consider that the humidity in this moment is 100%. In all the thickness of the concrete. Yes, because you just put the mixed concrete in place and it is starting to differ. The hydration starts from the top? No, hydration starts everywhere. But the losing of the water is from the top. That's just the fractions, the graph that you showed me. Yeah, you have to go on this side. You do it back, back, back, back, back. One more time, yeah, again? Back. Yeah, again, back, back. Yeah, here, this one, yeah. This one, this is just a fraction of the water and other components inside. This is not fraction. This is just to account how the process is made. The fraction might be very different. This is just how the humidity is made. It becomes to the humidity. And what are the types, as you can see, that it brings up having two types of water in concrete. There is a chemical bound and free water, which is content in the pore structures that you can hear or get for. And there is a chemical bound which is here already in the humidity products, which is not able to diffuse. So what we're talking about of diffusion is about these two types of water. So these are not the typical systems? No, no, no. This is just to show the question. But here, you can see that in the surface, again, after 20 days, there is almost 15% of difference. But in the bottom, it's just 2%. So you may wait years, or maybe one question. One other question about this moisture content. Yes, I think what is the thickness of the slope, test the slope? It's 25 centimeters more. 25 centimeters. Which method did you check the humidity? And what was the temperature and humidity of the environment? Internal, internal. OK, yes. Here, you have a question to mention this factor. The environment, it was exposed to 20 degrees by Celsius as an indoor climate without chance any environmental temperature, but the humidity was 70%. So it's a laboratory? Yes, this is just for humidity. We keep the weather stand constant as a 70%. This is actually a result from analysis from software, not from laboratory. Well, we are all OK. But also, by using this, we evaluate it, our model, with a lot of examples from laboratory or from other research papers. So this is to demonstrate how the model works. And if, in this case, do you mention that you have any cooling agent, or have you closed your surface software, or not? Here, in this case, because I've done a lot of different analysis, it was considered three days of perfect cooling. So the diffusion is starting after three days. So what do you mean, the perfect cooling? The thermal moisture transfer with the ambient. Sorry? There is no moisture transfer with the ambient. OK, but if it is a perfect cooling gas, why do we have moisture difference? No, I'm telling you three days of perfect cooling. After three days? Oh, OK. There is a, OK. OK. What's it? I mean, yes. So then, after doing the thermal humidity analysis, both of them normalize with the equations and everything to the results. And then we go forward to the mechanical analysis. And here, this is also an example of the joint. Here, we consider fully elastic material. So there is no cracking to see how the behavior of the material would be. And here, you can see some examples of the stresses. This is mentioned, the principal stresses that are the highest stresses appearing in this part. You can still mention these, like the node numbers. Well, here, I'm not sure if you can see her perfectly, but this is nonlinear water. And here, you could see some cracking. And this is the joint that it is perfectly cracked. But you can see very well. There should be like red and blue dots. So now we come to our point when is the optimal time of doing the cell codes. So to remind you what is the output, is the putting in the longitudinal or transversal direction to avoid undeniable cracks. So when you cut, do the cut in here. That's it. You force the concrete to crack in the place where you made the cut. So maybe you will cut one point of the depth and you will leave it in the crack. So there is a window when you should do this cell putting. If you do it very early, they might be relevant. Or you can damage the structure. Or if you do the lathe, the cracking might appear. And you might not be able to control it. So by the time, in some intervals, when the concrete is changing, there is in some intervals, you should do this cell putting. It normally might be from several hours to maybe a couple of days, depending. If I'm not mistaken, here some engineers also do it just by looking and by feeling if it is a time to cut, they don't do it in a couple of hours. Several hours. Several hours, in a couple of days. But if there are cases, you can wait a couple of days. Depending on the show cut windows in initial and final set during this time, yes? During initial and final set, you have only a few hours, in our case. If it's standardization values, yes, a different kind, which is a different value of time. But we'll speak about hours, the sewing. Well, I'm not sure about what you are telling about the sewing, because we haven't done for this any laboratory test. But what we have learned about from the literature is that it might be. Because my knowledge about the cell cutting is fine. Maybe you speak about longitudinal joints, but transversal joints must be cut in several hours. So here you can see that this is the same case. Well, these are the different cases when you're in the pudding for four days or one day. And you can see these two are the stresses appearing in the first two rows. And these lines and these graphs will show the strength in this part, in this time. So if they are crossing, it means in this part, there will be the complete graph. So what does it mean? It depends on different parameters. You can see in every graph, the parameters are different. You have different time of the, let's say, last point of the cell cutting. If you do after this on this time, it will be too late to cut. So taking these times, we might have some graphs which are showing the end of the cell cutting time, depending on the different parameters, that there will be shrinkage coefficient, that there will be the correct time, if the correct is perfect, or this will be the relative humidity of the end. And the other part is which we are going to put is the original function. So from the joint spacing distance, which we are doing right now, we have some results already, but we should somehow validate and put in the test in the convention of the work. And with this, we'll finish this part of the test. I think if we have time, we will continue also with the long life long period of the concrete periods, where we will discuss the exodotes and other parameters, but here until now, we did until this part. And that's the conclusion. We can say that the flexibility of the work will allow us to analyze the structure and the early age for the term of mechanical behavior. Also, it is available at people for not only concrete periods, but also some other massive concrete structures or ordinary concrete structures, such as bricks, we've done analysis of.