Debonding Location in Asphalt Concrete Associated with Moisture Damage
Publication: Journal of Materials in Civil Engineering
Volume 5, Issue 4
Abstract
Current adhesion theories fail to explain completely the stripping phenomenon. Quantification of stripping potential prior to mix design, and based on variables described in current adhesion theories, remains difficult. Current laboratory evaluation procedures are not completely reliable and fail to predict, with accuracy, the stripping susceptibility of various asphalt concrete mixes. This paper evaluates the existing adhesion theories and stripping mechanisms suggested in the literature. Factors contributing to the lack of success in predicting stripping susceptibility of asphalt concrete in the laboratory are also discussed. An earlier comprehensive investigation of the stripping phenomenon revealed serious deficiencies in the current approach to the problem. First, the interaction between the different components of the asphalt‐concrete mixture under a wide temperature range is neglected. It is proven that differential thermal contraction, as a result of the large difference in the coefficients of thermal contraction, is an important factor. This paper addresses another deficiency, which is the lack of a precise description of the location where debonding associated with moisture occurs. Observations made during the experimental investigation revealed that initial separation in the compacted mix takes place between the asphalt matrix (mix of asphalt cement and fine material) and coated aggregate particles.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 5 • Issue 4 • November 1993
Pages: 497 - 509
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Mar 3, 1992
Published online: Nov 1, 1993
Published in print: Nov 1993
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