Cape seal is a composite highway maintenance construction technology that uses a construction process of first laying a layer of gravel seal and then laying a layer of slurry seal/micro-surfacing. But what should you pay attention to when doing cape sealing? Maybe there are still many people who are not too clear about it. Today we will briefly talk about this issue.
The bonding material selected for the construction of the gravel seal in the Cape seal may be spray-type emulsified asphalt, while the bonding material used for the micro-surfacing construction must be modified slow-cracking and fast-setting cationic emulsified asphalt. The composition of emulsified asphalt contains water. After construction, the water in the emulsified asphalt needs to evaporate before it can be opened to traffic. Therefore, Cape sealing construction is not allowed on asphalt pavement when the temperature is below 5°C, in rainy days and when the road surface is wet.

Cape sealing is a two- or three-layer composite sealing construction and should be constructed as continuously as possible. Interference with other processes that may contaminate the asphalt layer should be avoided to prevent construction and transportation pollution from affecting the bonding between layers and affecting the construction effect.
Gravel sealing should be performed in a dry, warm climate. Micro-surfacing should be carried out after the surface of the gravel seal layer has stabilized.
Warm reminder: Pay attention to temperature and weather changes before construction. Try to avoid cold weather when constructing asphalt surface layers. It is recommended that April to mid-October be the road construction period. The temperature changes greatly in early spring and late autumn, which has a greater impact on asphalt pavement construction.