Changping District asphalt Quotation of road cold patching/cold asphalt construction
Features of asphalt road cold patch/quotation of road cold patch/
Mainly engaged in Beijing, Hebei, Tianjin, Inner Mongolia, Hohhot and other regions
1、 Product Introduction
Road Maintenance Department door Hot mixed asphalt mixture is usually used to repair the pavement. However, due to the influence of weather, temperature, pit size, quantity, damage degree and other factors, hot material repair can not be timely repaired for the pit that appears at any time, especially in winter, which will inevitably lead to increased damage, not only waste repair materials, but also affect traffic safety and reduce road service life.
The cold patching material uses special methods to modify the asphalt, so that the asphalt has the cohesiveness, pressure sensitivity and viscoelasticity, and can stick to the repair site for a long time without falling off after proper compaction. Cold patching material has been widely used in various provinces and cities for its advantages of being able to repair pavement under all day conditions, simple operation, good repair quality, long storage, cost saving, etc., and is increasingly recognized and welcomed by road maintenance departments.
2、 Characteristics of cold replenishment
1. All day repair materials
Cold patching material is applicable to a wide range of ambient temperatures, ranging from - 30 ℃ to 50 ℃. It can be used in rainy, snowy or sunny days
2. Simple construction
When cold patching materials are used to repair pavement pits and grooves, no adhesive layer oil is required. The materials can be taken at any time, and heavy construction machinery is not required. Impact compaction, manual compaction or vehicle tire rolling can be used according to different repair conditions of the pavement. In addition, the areas repaired with cold patching materials do not need to be closed to traffic, and can be opened to traffic immediately, greatly alleviating the traffic pressure caused by road repair construction.
3. Good repair quality
The cold patching material has strong aging relieving and bonding properties. The repaired pits are not easy to fall off, crack and other undesirable phenomena, and do not need to be repaired repeatedly.
4. Low repair cost
When cold patching materials are used for construction, they are not limited by the weather, the size and number of pits, and there is no need for heating or mixing during patching. They can be used at any time according to the actual amount. The remaining materials can be used in the next patching, without causing material waste. They can be used 100% truly.
3、 Scope of use of cold replenishment
1. This product is suitable for repairing and maintaining damaged pits and ruts on the pavement of expressways and airport runways.
2. It is applicable to the pavement restoration of general roads, * * streets, damaged pits, excavated holes, and underground pipelines Manhole cover Repair and maintenance of small shallow pits around and in front of the warehouse door.
3. Applicable to bridge expansion joint Heavy load road bridge junction, road curve with large traffic volume and special pavement repair.
4、 Construction method of cold replenishment
⒈ clear:
In general repair, the gravel and waste residue in and around the pit to be repaired shall be cleaned up, and there shall be no mud, ice and other sundries in the pit. For the repair of expressway and * * road excavation works, the repaired caves and trenches should have neat cutting edges, and the waste residue should be removed until the solid solid surface is seen.
⒉ fill:
Fill enough cold patching materials into the pit, knowing filler About 1.5 cm above the ground, the input of materials for expressway and general road repair can be increased by 20% or 10%. After filling, the middle point of the pit shall be higher than the surrounding road surface in an arc shape.
If the pavement potholes are damaged at a height of more than 5cm, the filling work shall be done every 3-5 cm, and the filling and compaction shall be done layer by layer.
⒊ Compaction:
After the paving is even, select appropriate compaction tools and methods for compaction according to the field repair environment, repair area size and high-rise degree. Such as: manual backhoe, manual tamper, vibrating plate tamper, flat bottom aluminum platen, truck tire, roller or paver and other compaction methods.
⒋ check before acceptance:
The surface of the repaired pit shall be smooth, flat, and free of wheel marks. The surrounding and corners of the pit shall be well compacted without looseness. Generally, the compaction degree shall be more than 93%.
matters needing attention
1. During low-temperature construction, it shall be stored in the warehouse above 5 ℃ for 24 hours.
2. When repairing high-grade highways, the surrounding and corners of the repair area shall be fully compacted.
3. It will be more economical and effective to take the method of repairing at any time instead of the traditional centralized repair method.
5、 Parameters of new road cold patching
1. Specific gravity of compacted cubic meter: 1 cubic meter ≈ 2.36 tons
2. Approximately repairable area of 1 ton of material:
High level of repair -------- approximate repairable area
3cm-------------17m2
5cm-------------10m2
8cm-------------6.25m2
10cm------------5m2
