Research Report 4 Cooling of bituminous layers and time available for their compaction

Publication Year

1985

Document Status

Current

Abstract

A computer model has shown that the cooling time of a hot bituminous layer is very dependent upon the laid thickness, being proportional to the thickness to the power 1.8. The cooling time is also strongly dependent upon the initial laying and specified minimum compaction temperatures and on the ambient windspeed and temperature. A set of tables is presented enabling the compaction time to be predicted from a knowledge of the laying and environmental conditions. Recommendations are given to establish minimum blade thickness for various types of rolled asphalt, to achieve a reasonable compaction time.

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