Evaluating the current standard test methods in assessing moisture induced damage for highway and airfield asphalt pavement mixes
Asphalt stripping is characterized by a loss of adhesion and/or cohesion between the bituminous cement and the aggregate. Stripping always occurs in the presence of water, and therefore it is referred to as moisture damage. Despite the extensive research efforts expended in investigating the stripping problem, the moisture damage still persists to show in newly constructed asphalt pavements. In addition, Canadian airfields and highway asphalt pavements show evidences of stripping due to moisture susceptibility. Repair of the damaged roads costs local, state, and federal highway agencies billions of dollars every year. Therefore, it is important to predict the moisture induced damage accurately. The main objective of this paper is to evaluate the standard test methods that are currently used to evaluate stripping for asphalt pavement mixes. Five mixes were tested in the comparison between four major standard test methods that are currently used to evaluate stripping. A total of 130 laboratory sample and 52-field core were prepared to achieve the objective of this investigation. The observations and the statistical analysis of the results showed that the evaluated standard test methods were able to differentiate between the long term performance of different mixes, however, they were not able to evaluate the susceptibility of airfield asphalt pavement mixes to moisture induced damage. The outcomes of this paper recommended developing a new test method to be used to evaluate stripping for Canadian airfield and highway asphalt pavement mixes.
|Keywords||Long-term performance, Moisture damage, Predict, Repair, Stripping, Susceptibility|
|Conference||4th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, MAIREPAV 2005|
Mostafa, A. (A.), Halim, A.O, & Easa, S. (S.). (2005). Evaluating the current standard test methods in assessing moisture induced damage for highway and airfield asphalt pavement mixes. In 4th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, MAIREPAV 2005.