Moisture damage in pavements can be defined as the loss of stiffness and strength in the asphalt ... more Moisture damage in pavements can be defined as the loss of stiffness and strength in the asphalt mixture due to a combination of mechanical loading and moisture intrusion. There are three mechanisms by which moisture degrades mixture performance: loss of cohesion within the asphalt, adhesive failure between aggregate and asphalt, and degradation of the aggregate. The aggregate mineralogy, texture and porosity play a major role in the bond strength development. Furthermore, asphalt composition affects the bond strength since variation in concentrations of asphaltenes and maltenes can create different adhesion with the mineral surface. The purpose of this paper is to investigate the mechanisms by which moisture can affect the bond between asphalt and aggregates. The loss of bond strength due to moisture conditioning was evaluated by means of the newly developed Bitumen Bond Strength Test (BBS). An experimental matrix, which included different binders, modifications, and aggregate type...
Moisture damage in pavements can be defined as the loss of stiffness and strength in the asphalt ... more Moisture damage in pavements can be defined as the loss of stiffness and strength in the asphalt mixture due to a combination of mechanical loading and moisture intrusion. There are three mechanisms by which moisture degrades mixture performance: loss of cohesion within the asphalt, adhesive failure between aggregate and asphalt, and degradation of the aggregate. The aggregate mineralogy, texture and porosity play a major role in the bond strength development. Furthermore, asphalt composition affects the bond strength since variation in concentrations of asphaltenes and maltenes can create different adhesion with the mineral surface. The purpose of this paper is to investigate the mechanisms by which moisture can affect the bond between asphalt and aggregates. The loss of bond strength due to moisture conditioning was evaluated by means of the newly developed Bitumen Bond Strength Test (BBS). An experimental matrix, which included different binders, modifications, and aggregate type...
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Papers by Raquel Moraes