Asphalt pavement repair cold patch material is a special road maintenance material, which is made of mineral material (aggregate) mixed with diluted or modified asphalt, and has many excellent properties and a wide range of application scenarios.
1. Composition
The main components of asphalt cold patch material include:
Base asphalt: as the base material of cold patch material, it provides adhesion and plasticity for the mixture.
Aggregate: such as stone, sand, etc., used to provide the skeleton structure of asphalt cold patch material and enhance the strength and stability of the repair material.
Additives: including modifiers, anti-aging agents, binders, etc., used to improve the performance of asphalt, such as improving adhesion, anti-aging, water resistance, etc.
Isolator: used to prevent asphalt from hardening prematurely and bonding prematurely with aggregates, ensuring that asphalt cold patch material maintains proper fluidity during storage and transportation.
These ingredients are mixed in a specific proportion to ensure that the asphalt cold patch material has proper fluidity, adhesion and durability at room temperature.

2. Characteristics
Liquid and viscous at room temperature: stable in nature, easy to store and transport.
Good adhesion: can be closely combined with crude oil asphalt pavement to form a solid patch layer.
Strong durability: can resist the influence of vehicle load and environmental changes, and extend the service life of the road.
Convenient construction: no heating equipment is required, which simplifies the construction process and reduces construction costs.
3. Construction method
Material preparation: select appropriate asphalt cold patch materials according to the road damage, traffic flow and climatic conditions, and prepare auxiliary tools such as cleaning tools, cutting tools, compaction equipment, measuring tools, marking pens and safety protection supplies.
Damaged road cleaning: thoroughly remove debris, dust and loose materials on the damaged road surface, and keep the repair area clean and dry. For larger potholes, the damaged edges can be cut neatly with a cutting machine to form a regular repair area.
Pot filling and compaction: Pour an appropriate amount of cold patch material into the pothole, and use a shovel or hand tool to initially pave it. Note that the filling amount should be slightly higher than the surrounding road surface to compensate for the material settlement during the compaction process. Then use a compactor or roller to compact the cold patch material to ensure that the patch area is tightly combined with the surrounding road surface without gaps.
Maintenance and opening traffic: After the repair is completed, wait for a period of time according to weather and temperature conditions to allow the cold patch material to fully solidify. During this period, temporary traffic signs should be set to restrict or guide vehicles to detour to avoid the repair area being affected by premature or excessive loads.
IV. Precautions
Temperature influence: The use effect of cold patch materials is greatly affected by temperature. Try to carry out construction during periods of high temperature to improve the material adhesion and compaction effect. When constructing in a low temperature environment, preheating measures can be taken, such as using a hot air gun to preheat the potholes and cold patch materials.
Humidity control: Ensure that the repair area is dry and water-free to avoid affecting the bonding performance of the cold patch material. Construction should be suspended or rain protection measures should be taken on rainy days or when the humidity is high.
Safety protection: Construction personnel should wear safety protection equipment and abide by safety operating procedures to ensure construction safety. At the same time, pay attention to environmental protection to avoid pollution of the surrounding environment by construction waste.
In short, asphalt pavement repair cold patch material is a road maintenance material with excellent performance and convenient construction. In practical applications, appropriate cold patch materials should be selected according to specific circumstances and the construction steps should be strictly followed to ensure the best repair quality.