How many days does the asphalt emulsion lower seal coat on the municipal road base need to be cured? In addition, can the upper layer be made of concrete or asphalt?

The curing time of asphalt emulsion under the top seal of base course should be more than 24 hours, and the next working procedure of individual construction projects will start after 12 hours.

If the surface layer is cement concrete, there is no priming oil on the base layer; In the case of asphalt concrete, the base should be paved with priming oil.

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