Is it possible to lay asphalt in the rain: requirements and recommendations

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?

Certain circumstances

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.

What is special

Modern pavement is laid as follows:

1. A place is being prepared that is thoroughly cleared.
2. Rubble is covered with a layer of at least 5 cm.
3. A special emulsion is poured.
4. A layer of bitumen is laid on it and dry rubble.
5. The created “cake” is carefully rolled by the roller.

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.

Modern requirements

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:

• The substrate must not be wet.
• If the precipitation is small, the mixture is cast and cold.
• The air temperature for using the hot mix should not be lower than + 10 ° С, for cold - not lower than -5 ° С, for cast ones - not lower than -10 ° С.

If the window is minus

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.

Hot and cold styling

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:

1. Summer. It is used when breaking temperatures from +15 to + 30 ° C.
2. Interseasonal. It is suitable for work at temperatures from -5 to + 15 ° С.

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.

Molded 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.

Life time

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.

Eventually

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:

1. The surface is prepared: pits and 3-4 cm around are carefully cleaned from moisture, dust and dirt.
2. Then the boundaries are laid out. Straight lines are drawn along the web and across with a 5 cm grip of the periouam coating.
3. If the potholes are close to each other, they are united by one perimeter.
4. The contoured contour (necessarily rectangular or square) makes vertical indentations to the depth of the pit, but not less than the thickness of the entire coating layer.
5. Again, everything is cleared of debris dust and pieces of asphalt.
6. The walls of the pit are treated with liquefied bitumen or bitumen-based emulsion.

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.

The main reasons for off-road

In addition to improper operation, the following can be attributed to the main ones:

• Saving of bitumen emulsion (it providesadhesion of the old coating, soil and rubble). Its lack or absence leads to a rapid "driving around" the laid canvas, and as a result cracks appear.
• Rain water or melted snow gets into unpaved bald spots in asphalt.
• Insufficient layer of rubble or replacing it with brokenbrick. “Easy” roads suggest a single layer of crushed stone of an average fraction (20-40 mm). The general purpose canvas requires stacking of several layers of rubble. First, a large fraction (40-70 mm), then a layer of middle and upper layer - a small fraction (5-20 mm). Each rolls through the rink.
• The height of each layer of asphalt "pie" is less than stated in the regulations.
• Untimely work performed.
• Failure to follow the styling technology.
• Saving asphalt or unacceptable quality.Asphalt is made from oil. And not every grade is suitable for the production of asphalt. This is partly why the coating is fragile. Plus insufficient layer thickness. If a layer of 4–5 cm is sufficient for localities, then there should be several layers on the motorways. And a different grain. First, coarse-grained asphalt concrete is laid, followed by fine-grained. For reliability, the third layer is also laid. Everybody shed bitumen.

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.

Post scriptum

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.