Highways Agency Reports

Prevoius work has shown that current specifications do not always identify the weather conditions that are unsuitable for laying and compacting rolled asphalt wearing course materials. Using data from the metrorological office for nine airfield sites, it is shown that the weather conditions in the UK can be considered adverse for over 90% of the time for compacting a 40mm thich rolled asphalt mat. On the other hand, the weather is rarely unsuitable for laying a 50mm mat. Mathematical models are described for predicting the probablitity of the weather being adverse for sites at given latitude and altitude by month and time of day.