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Title:

IN-SERVICE REPAIR OF HIGHWAY BRIDGES AND PAVEMENTS BY INTERNAL TIME-RELEASE REPAIR CHEMICALS
Cover of IN-SERVICE REPAIR OF HIGHWAY BRIDGES AND PAVEMENTS BY INTERNAL TIME-RELEASE REPAIR CHEMICALS

Accession Number:

00815911

Record Type:

Monograph

Availability:

National Technical Information Service

5301 Shawnee Road
Alexandria, VA 22312 United States
Order Number: PB2001-108551

Abstract:

This Innovations Deserving Exploratory Analysis (IDEA) project evaluated the concept of self-repairing concrete containing fibers filled with adhesives in large-scale laboratory and outdoor tests. Four specific applications for this concept were explored in the laboratory and outdoor experiments. In frames in the laboratory, it was shown that adhesive release from ruptured fibers helped distribute stress over the entire structure. In four full-scale bridge decks, the adhesive filled tubes were put near the surface to function as creators of automatically fillable control joints. Surface shrinkage cracking acted to pull the brittle tubes apart and the sealant/adhesive flowed to fill the cracks. In another application, the adhesive-filled tubes were placed in the body of the deck to break due to shear cracking and repair these cracks. This type of release not only strengthened the decks but also distributed the stress to other locations. In the final application, large beams containing adhesive-filled tubes were tested to failure. The results showed added strength due to release of adhesives. The study also established the survival of adhesive-filled tubes during mixing in the concrete mixer, maintenance of the liquid phase of the adhesive, and ease of finishing the concrete.

Supplemental Notes:

This NCHRP-IDEA investigation was conducted by the University of Illinois, Champaign. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

Report/Paper Numbers:

NCHRP-IDEA Project 37

Contract Numbers:

NCHRP-37

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Dry, C

Pagination:

45 p.

Publication Date:

2001-8

Serial:

NCHRP-IDEA Program Project Final Report

Publisher: Transportation Research Board

Period Covered:

9611-9811

Features:

Figures; Photos; References; Tables

Subject Areas:

Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods

Files:

TRIS, TRB

Created Date:

Aug 29 2001 12:00AM