Developments In Coatings To Combat Negative Skin Friction - Bitumen Coatings: Practical Design And Construction Aspects

Machan, George
Organization: Deep Foundations Institute
Pages: 12
Publication Date: Jan 1, 1989
Bitumen coatings have been successfully used to significantly reduce downdrag on piles. Thicker coatings of "soft" bitumens can accommodate downdrag so well that very little downdrag load is transferred to the pile. Many of the case histories describe better than 80 percent downdrag load reduction. Bitumen coatings have been used on several projects in Oregon. On the Mocks Bottom Bridge project (see Reference 1), experimentation and instrumentation confirmed the viability of bitumen coatings and provided insights for design and construction. Subsequent bridge projects have used this information and have raised issues to be resolved.
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