Flexible pavement design for hot climates – a case study

This paper discusses the application of best practice and lessons learnt in pavement design for hot climates through the presentation of a case study from a large highway project in the State of Qatar. The environmental conditions experienced in hot climates pose several challenges for engineers when designing a pavement capable of surviving its anticipated service life. The predominant challenge is developing realistic predictions of asphalt modulus as an input into analytical pavement design. There is also a challenge in ensuring that inputs into empirical designs reflect the local environment and the properties of materials used. This paper discusses how international design practice, knowledge and research of pavement materials were translated into design and, subsequently, construction. The process of developing and selecting design inputs for empirical and analytical design approaches is discussed. The paper also highlights the best practices associated with the design of pavements with a cement-stabilised base.