Thickness determination for pavement with cold asphalt

3 Thickness determination for pavement with cold asphalt 

For the determination of the thickness of the pavement consisting of cold asphalt, there are two alternatives. One is for all the layers to be constructed with cold asphalts, and the other is for the cold asphalt to be laid over an unbound aggregate layer. 

When cold asphalt Type I is used, a surface treatment is required. When cold asphalt Type II or III is used, the top layer is required to be from hot asphalt concrete. The minimum required thickness of asphalt concrete is determined by the traffic volume and is as shown in Table 13.3. However, it is common to replace the top 50 mm with hot asphalt concrete even if Type I mix is used. 

Traffic level, ESALs Minimum thickness of asphalt concrete (mm) 

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