Researching on influence factors and value confirmation of elastic modulus (Eac), layer coefficient (ai) of some types of hot dense asphalt concrete in Vietnam

Abstract

The method of designing flexible road structures under the guidance of AASHTO 1993 was used in many states in the US and Canada and is being applied by many other countries in Europe and Asia. The layer coefficient ai in the AASHTO design equation represents an empirical relationship between the structural index SN and thickness. The value of the layer coefficients (ai) is specified for each material layer depending on the quality shown mainly through resilient modulus. This paper presents the initial research results of influencing factors and value confirmation of resilient modulus (Eac) and layer coefficients (ai) of some types of hot dense asphalt concrete in Vietnam.