The mechanisms of moisture damage in asphalt pavement by applying chemistry aspects

Abstract

Moisture damage occurring within asphalt pavement causes the pavement to undergo several types of distress, such as stripping, potholes, and others. The durability or integrity related to moisture damage plays an important role in other types of damage or distress, such as rutting and fatigue. The development of a Dynamic Shear Rheometer (DSR) moisture damage test is the result of an effort to estimate the moisture damage in a simple, practical testing setup. As a conceptual supporting step, in turn, this paper provides fundamental, general mechanisms to explain the asphalt-aggregate bond behaviors during wet conditions in a DSR moisture damage test. Shear-thickening and thixotropy are introduced to explain the asphalt-aggregate interface behaviors under wet conditions, in view of a colloidal system. Moreover, the self-assembly concept is introduced with regard to a supramolecular system. Both systems can be associatively applicable because of their conceptual similarities. The analysis of data recorded during wet conditions supports and explains qualitatively the reversible structure of the asphalt-aggregate interface.

Towards an Alternate Evaluation of Moisture-Induced Damage of Bituminous Materials

“…Mixtures that are not properly designed or evaluated against ever increasing traffic loading alongside the expected exposure to moisture in the field could potentially affect the pavement durability that can lead to progressive degradation in the form of several distresses, such as raveling, rutting, or cracking [3][4][5]. In service life, the bituminous pavement is subjected to different environmental conditions combined with traffic loading, which both affect the durability and life-cycle cost of the constructed structure.…”

Material degradation due to moisture and temperature. Part 1: mathematical model, analysis, and analytical solutions

“…Some popular research works in this direction are [Willam et al, 2005] for modeling thermo-mechanical damage processes in heterogeneous cementitious materials and [Allam et al, 2013] on the behavior of reinforced concrete slabs exposed to fire. On the other hand, some popular research works for the chemical degradation are [Björk et al, 2003] on the environmental effects of alkalinity and humidity on concrete slabs, [Cho and Kim, 2010] on moisture damage mechanisms occurring within asphaltic materials and pavements, [Bouadi and Sun, 1990] on thermal and moisture effects on structural stiffness and damping of laminated composites, and [Weitsman and Guo, 2002;Weitsman, 2006] on fluid-induced damage and absorption in polymeric composites. However, none of the above mentioned papers on thermal or chemical degradation have a proper thermodynamic basis.…”

Assessing the Effect of Nano Hydrophobic Silane Silica on Aggregate-Bitumen Interface Bond Strength in the Spring-Thaw Season

“…Cho et al focused on suggesting general mechanisms to explain asphalt-aggregate bond behavior in the Dynamic Shear Rheometer (DSR) moisture damage test. The results indicated that shear-thickening and thixotropy can explain the reversible behavior, the increasing dropping trend in wet conditions in the mechanism of the colloidal system [26]. Caro et al evaluated the influence of material properties and loading conditions on the response of asphalt mixtures subjected to a moisture environment.…”