Is cold patch bagged? How is cold patch made?

The "matrix asphalt, separator and additives" of Jiage cold patch material are mixed and mixed evenly in proportion in the asphalt mixing tank to prepare the "cold make-up liquid", and then the cold make-up liquid and aggregate are mixed and mixed in the mixing building according to a method similar to the traditional hot mix process, and the finished material is bagged and stored.

Asphalt cold patch is a high-tech road paving and repair material, the core material from the United States, the initial research and development is based on the winter maintenance emergency rescue and paving a small area of road surface needs, to prevent the appearance of potholes on the road, affect driving safety, improve travel conditions, and facilitate construction. In winter, the temperature in northern China is below the freezing point, and the hot asphalt concrete produced by the large asphalt concrete mixing building can not solve the problem of thermal insulation and storage, and the road paving scale in the area such as emergency maintenance or community park is small, and the number of cold patch materials is small, and it is not worth the mass production of large-scale mixing buildings, so paving the road surface or repairing the pothole with cold patch material is the only choice for asphalt pavement construction in winter.

At present, the domestic cold patch material is transported by car after bagging, and when the new road surface is paved, it is necessary to place the bagged cold patch material on the road surface to be paved according to the paving thickness according to a certain horizontal and longitudinal separation distance, and then after the bag is cut, the cold patch material is poured out manually, and simple tools such as shovel and push handle are bulldozed manually, and finally compacted. The disadvantages of this construction method are obvious: firstly, asphalt cold patch material is a kind of concrete with poor fluidity, and it is difficult to pave and smooth completely by manual paving, and paving is time-consuming and laborious, and labor intensity is large, and it is inevitable that there will be new pavement cold patch segregation seepage, pothole unevenness phenomenon after compaction, resulting in tire noise caused by driving, water on the road surface on rainy days, and the phenomenon of short service life.

Therefore, in order to pave an asphalt pavement that meets the design requirements of flatness and strength, it is necessary to use pavers to pave and compact on site to achieve mechanized construction.

Asphalt cold patch is cold mix and cold laying, which needs to be stored for a long time and constructed at room temperature. Because of the inherent defects of high-temperature flow and low-temperature brittleness of road petroleum asphalt, it is necessary to dilute the asphalt with solvents, change the inherent storage state of the asphalt, and mix various additives such as cold supplement, anti-rutting agent, anti-spalling agent, cellulose and other additives to fully modify the asphalt, and the mixed cold patch has the properties of anti-high temperature deformation, anti-low temperature solidification, and anti-water damage stripping, so that it can be used all day and is suitable for repairing various types of road surface layers in any weather and environment. Therefore, compared with the general conventional hot asphalt concrete, the cold patch material has high viscosity, small fluidity, and poor workability in construction. Paving asphalt cold patch with a paver, the most important thing is to solve the problem of poor fluidity of cold patch material and improve the workability of construction under the premise of satisfying the pavement strength of asphalt cold patch paving, otherwise mechanical paving construction can not be carried out due to the lump of cold patch material agglomeration.

Cold patch is a high-tech road repair material that can be used around the clock and is suitable for repairing various different types of road surfaces in any weather and environment, such as asphalt concrete roads, cement concrete roads, parking lots, airport runways, etc. After years of continuous improvement and refinement, the performance of cold feed materials is more mature. Both in terms of quality and use, it is superior to hot-mixed asphalt and emulsified asphalt mixture, and has been applied all over the world with its simple operation, long-term storage, repair, wide range of uses, and environmental protection, and has been popularized and applied in many municipal roads, general highways and highways in China.

Key features: Weather and environment apply.

The cold patch is suitable for a wide range of ambient temperatures, which can be applied between -30 and 50, and the cold patch has excellent waterproof performance, and can be constructed in rainy and snowy weather and waterlogged pits.

The construction is simple. The use of cold repair materials, no need for adhesive layer oil during repair, material preparation can be taken at any time, no heavy construction machinery is required for use, impact compaction, manual compaction, etc. can be used according to the different repair conditions of the road surface.

The repair quality is excellent.

Cold patch material has strong anti-aging and adhesive functions, and the anti-hole after repair is not easy to produce undesirable phenomena such as falling off and cracking, and does not need to be repaired again.

Easy to save. The finished cold patch product can be stored in the open air for up to two years at room temperature, and the finished product can be stored in bags for a longer time.

Immediately open to traffic. The area covered by cold repair materials does not need to be closed to traffic, and can be opened to traffic immediately, greatly alleviating the traffic jams caused by road repair work.

Green and environmentally friendly. The production and use of cold patching materials will not produce dust and black smoke, and the materials are insoluble in water, so they will not pollute the atmosphere and water, which is conducive to environmental protection.

Versatile. Cold patch materials have good adhesion to materials with different substrates such as asphalt concrete, cement concrete, metal surface, etc., and can be widely used in the repair and maintenance of highways, general highways, municipal roads, airport roads, bridges and other pavements.

Low cost of patching.

Use cold patch material for construction. It is not limited by the weather and the size and number of potholes, and the repair is timely, which can avoid the expansion of the potholes, save the repair materials, and do not need to be heated and stirred during the repair, and can be used at any time according to the actual amount, and the remaining materials can continue to be used in the next repair, which will not cause material waste, and is truly 100% utilized.

The social benefits are significant.

From the perspective of the molding mechanism, the asphalt used in asphalt hot material is thermoplastic, while the asphalt of asphalt cold patch is modified and is not completely thermoplastic. The strength formation of asphalt cold patch has a slow process, and it is malleable, fluid, and can be extruded into irregularities in the pit during paving and rolling. Under the action of driving and air, a part of the solvent is volatilized, the asphalt gradually thickens, the distribution between the asphalt cold patch particles is tighter, the porosity is reduced, and the bond between the ore materials is stronger.

As the density of asphalt cold patch increases, the feeling of softness of the pavement will gradually disappear, and this process will take 7-10 days. After that, the strength will gradually increase, and after about three months, its deformation and strength will gradually stabilize, reaching or exceeding the performance of the asphalt hot material after cooling.

Asphalt cold patch and asphalt hot material construction, asphalt hot material production is a large batch, for the pavement pothole repair is a large area or the pit is more convenient in the case of more concentrated, but if the pit damage position is more scattered, and the pit is small and the amount of repair is less, winter and rain more season, asphalt hot material is not convenient to use. Asphalt cold patch solves the drawbacks of asphalt hot material, packaged in bags, taken with use, less affected by temperature and weather, and convenient for timely repair of the road surface. And more convenient than asphalt hot material construction, no need to heat and stir, open bag paving with manpower rammer, vibrating plate rammer or roller and other tools compacted, no need for large equipment, paving can be immediately open to traffic, traffic interference for large traffic flow is less.

Hunan Xiangtan Hongxing Highway Materials****, focusing on road materials for 18 years.

Cold patch material is specially used for road pothole repair and pavement paving of a kind of material, the core material from the United States, the initial research and development is based on the winter maintenance emergency rescue and paving a small area of pavement needs, to prevent the appearance of potholes and grooves on the road, affect driving safety, improve travel conditions, and facilitate construction. In winter, the temperature in northern China is below the freezing point, and the hot asphalt concrete produced by the large-scale asphalt concrete mixing building can not solve the problem of thermal insulation and storage, and the road paving scale in the area of emergency maintenance or community park is small, and the number of cold patch materials is small, and it is not worth the mass production of large-scale mixing buildings, so it is a good choice for asphalt pavement construction in winter to pave the road surface or repair the pothole with cold patch material.

With the maturity of the cold patch process and the development of technology, asphalt cold patch has been vigorously promoted, is widely used in various grades of highways, roads, Yantai Huatong asphalt cold patch in addition to the use of more stable performance of imported cold patch additives, in addition to the addition of anti-rutting agent and anti-spalling agent, anti-rutting agent, can resist the repair of the pit truck after overloading after the high temperature deformation ability, fast curing, to prevent rutting; Anti-spalling agent, can increase the adhesion of asphalt mucosa and aggregate surface, has excellent water damage resistance, can be used in rain, snow and other harsh environments for emergency maintenance construction such as pavement repair, especially after rainwater soaking will not appear loose, falling off phenomenon, strong water resistance, can achieve the effect of a repair and permanent repair.

Compared with other alternative materials or cavity materials, the construction process of cold patch materials is easier to be taken over, which is simple, convenient and feasible.

1. Cleaning of potholes.

Clean up the gravel and waste residue in and around the pit to be repaired, and there shall be no mud, ice and other sundries in the pit, and the pit to be repaired should have a neat cutting edge, and the removal of waste residue should be seen until the solid solid surface is seen.

2. Brush the interface edge banding agent.

Evenly brush the interface agent on the façade and bottom around the cleaned pit, especially around the pit and the corners of the pit to be full and even.

3. Fill the pit.

After opening the bag, fill enough asphalt cold patch material into the pit until the filler is higher than the road surface, after filling the pit ** should be slightly higher than the surrounding road surface and arc-shaped, if the depth of the pavement pit is greater than 5cm, it should be filled in layers, compacted layer by layer, and each layer is 3-5cm.

4. Compaction. After laying evenly, according to the field environment, the size and depth of the repair area, select appropriate compaction tools and methods for compaction. Such as manpower rammer, vibrating plate compaction, road roller, etc.

When repairing high-grade and high-traffic highways, the surrounding and corners of the repair area should be fully compacted, and there must be no lack of materials, otherwise it is easy to loosen and seep due to insufficient compaction.

5. Open to traffic. After compaction, it can be directly opened to traffic.