A frequent situation - laying asphalt in the rain - causes a surge of negative emotions among our compatriots. Most of us believe that this is a violation of all rules and regulations. Is it so?
So, is it possible to lay asphalt in the rain?The SNiP, still Soviet, but acting, regulates the ambient temperature - not below + 15 ° C. But technology does not stand still. Today, there are innovative materials that allow you to perform work, even if the temperature is below zero. True, not below -10 ° C.
Modern pavement is laid as follows:
In addition to debris and remnants of the old coating, wetroad clean brushes from moisture. After that, heat the infrared heaters. But they have low productivity. Therefore, on our roads it is very often possible to meet tractors with aircraft engines installed on them. Their stream of hot air makes the area suitable for laying the mixture.
Under these conditions, it turns out the most durable coverage of Russian roads today.
Even with the availability of innovative materials, the question “whether it is possible to lay asphalt in the rain” requires compliance with certain conditions. Like that:
In the cold season, the area for laying asphalt is trimmed from the melting snow and ice. It is then processed with special reagents.
Any precipitation at this time of year lowers the temperature.It is not recommended to lay thick layers of asphalt at this time. Work should be carried out across the entire width of the roadway and at a time. In case of heavy rain, laying asphalt is strictly prohibited. At low temperatures, is it possible to lay asphalt in the rain? Can. But you need to add special technical shrinkage to the mix.
The cold method is most often used whenrepair or restoration work. Its main advantage is all-season. That is, this is exactly the case when the question “whether it is possible to lay asphalt during rain” is irrelevant. Moreover, the cold method of laying is suitable even in winter.
Cold asphalt can be of two types:
None of them is suitable for the construction of a new roadbed. To do this, use only hot asphalt.
If conditions do not allow, resort to innovative technology cast asphalt.
It is a mixture of bitumen with gravel, sand.and ground limestone. It is not necessary to roll such asphalt. Its consistency is such that it lays without a thick seal in a dense cast layer. One of its advantages is water resistance. This is exactly the case when asphalt can be put in the rain or even at -10 ° C. The maximum thickness of a layer of cast asphalt should not be more than 30 mm.
Rules and regulations allow for the destruction of 5%roadway after patching. The warranty period is set depending on the intensity of movement. For example, in the local area it is only two years old. If during this time there are defects or cracks (road builders distinguish these concepts), the contractor performs repair work at his own expense. This may be, for example, potholes, subsidence of the web or drainage grids, rutting, etc.
On highways asphalt changelarge canvases. According to the same standards, it is necessary to perform these works in dry weather. To the question “is it possible to lay asphalt in the rain,” experts say that no one forbids this, but if it is small. To do this, you must comply with several conditions. One of the main ones is that the mixture should have an elevated temperature (for evaporation of moisture). And for this purpose, it is necessary to have a factory for its manufacture nearby, and to carry out work on site quickly and efficiently.
So is it possible to lay asphalt in the rain?The existing rules and regulations do not allow road builders to wait for comfortable weather either for patching or for laying a new roadbed. This is directly indicated by the GOST “Highways and Streets”.
In general, the scheme of action of repairing the road in wet conditions is simple:
So it turns out that the question is whether to putAsphalt after rain, as in the rain, and on a wet surface, in modern realities, is solvable. But the work must be carried out promptly: rapid unloading, distribution and immediate compaction with a roller. The only "but": the top layer in wet conditions can not be laid.
In addition to improper operation, the following can be attributed to the main ones:
But the most compelling reason is negligence.Many road workers do not “bother” with the question “can you put asphalt in puddles”. Just put. And as a result, the water trapped under the coating freezes, widening cracks. But is it always negligence? Maybe a cold calculation? After all, sagging and cracked asphalt needs to be repaired again.
Since the beginning of 2011 in our country beganact the new rules for the repair of the roadway. The main change is that restoration work is now carried out once every three years (previously every seven years). Around the same time, began to lead the history of roads. Each repaired kilometer is registered in the documents. And in the event of a marriage, the contractors who carried out the work repair the canvas at their own expense.