According to the original structure of the road, the construction scheme of the cold regenerator is also different. Let's introduce it to you today:
When using cement for in-situ cold regeneration, the additive is mainly cement, and the usual dosage of cement is between 2% - 5% by weight. If the amount of cement is too much, it is easy to make the recycled layer brittle. In order to obtain good compaction effect, an appropriate amount of water should be added at the same time. water
There are two ways to add mud! One is to use manual or special machinery to pre distribute cement on the road surface that needs regeneration. At this time, the water is added through the microcomputer control system equipped on the regenerator, which is transported from the water truck of the attendant to the mixing bin of the regenerator.
Another method is to use the cement slurry mixing truck to mix the cement and water to be added into cement slurry, and then transport it to the mixing bin of the regenerator through the control system on the regenerator.
The above two addition methods have their own advantages and disadvantages. The pre cement method is simple, but it is easy to produce dust in the construction process. However, this method has a great advantage, which is very convenient in controlling the dosage.
Because in the construction, the "recycling machine" can complete the milling of the whole pavement in an operation section only by dividing into several working strokes, and the rolling of the recycling layer can only be carried out after the completion of all construction processes in the whole operation section
This results in a great difference in the waiting time interval between the first milled pavement and the later milled pavement to rolling. In a hot or dry climate, with the delay of time, the water evaporation of the first milled pavement is more, and the water evaporation of the later milled pavement is less.