The Contribution of Microorganisms to Stripping and the Ability of an
Organofunctional Silane to Prevent Stripping
Lewis R. Brown, Gerard S. Pabst, Jr and John R. Marcev
Abstract
This paper is a report on the contribution of microbes to stripping of asphalt concrete and on the ability of an organofunctional silane, Union Carbide A-174, to prevent the stripping. There are large numbers of microorganisms present in samples of degraded asphalt highways. Laboratory tests have shown that microorganisms significantly accelerate stripping. Preventing microbial growth with lime or mercuric chloride significantly reduces stripping. Pretreating gravel with an organofunctional silane reduces stripping significantly, even when the gravel is only partially coated with asphalt and subjected to vigorous microbial action.
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Tags: ability of, the ability, contribution, microorganisms, stripping, ability