IJCT (2017) 1–7 © JournalsPub 2017. All Rights Reserved Page 1 International Journal of Concrete Technology Vol. 3: Issue 1 www.journalspub.com Susceptibility Behaviour of Asphalt Concretes Under Varying Mix Temperature Conditions: Study on Stability and Flow Enwuso A. Igwe*, Daniel Azeruibe Nyebuchi Department of Civil Engineering, Rivers State University of Science and Technology, Nkpolu Oroworukwo, Port Harcourt, Rivers State, Nigeria ABSTRACT Understanding the behaviour of flexible pavements synonymous with asphalt concretes is one that can be complex due to the make-up of the pavement (asphalt concrete) and the external factors that impedes its performance from production stage to service life. The present study had considered one of the most damaging factors to asphalt concrete – mix temperature; and its effect on some of the mix design properties of asphalt concrete that govern its performance during service life. The two mix design properties considered were flow and stability for three categories of traffic – light, medium and heavy categories respectively. The results from the present study showed that increase in mix temperature from 20 to 60°C resulted in increased flow of the asphalt concrete for all categories of traffic considered which initiates premature failure of pavement (asphalt concrete). Similarly, increase in mix temperature from 20 to 60°C resulted in decreased stability of the asphalt concrete for all categories of traffic considered which furthers premature failure of pavement (asphalt concrete). Keywords: asphalt concrete, temperature, stability and flow *Corresponding Author E-mail: igwe2002@yahoo.com INTRODUCTION Transportation engineering has four major disciplines namely – transportation planning, traffic engineering, geometric design and pavement design (Matthew and Rao, 2007). The first stage which is transportation planning is essentially to develop a transportation model that will almost accurately represent both the current as well as future transportation system (Matthew and Rao, 2007) [1]. On the other hand traffic engineering with respect to transportation engineering involves majorly the estimation of traffic volumes that will use the pavement facility during design life. Furthermore, it includes a classification of the vehicle types that will use the pavement as aforesaid. Matthew and Rao (2007) [1] further posits that traffic engineering covers a broad range of engineering and management skills such as design, operation and optimization. Thirdly, geometric design deals with physical proportioning of other transport facilities in contrast with pavement design. However, pavement design deals with three major aspects in transportation engineering which includes materials mix design, structural design and distress analysis. For purpose of the present study the research was limited to pavement design with respect to materials mix design. Materials mix design involves largely the proportioning or selection of an economical blend and gradation of aggregates and asphalt that yields a mix having the following pavement qualities (Ogura, 2005) [2];