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Title:

HIGH MOLECULAR WEIGHT METHACRYLATE SEALING OF A BRIDGE DECK

Accession Number:

00489734

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309047749

Abstract:

The Iowa Department of Transportation used a high molecular weight methacrylate (HMWM) resin to seal a 3,340-ft x 64-ft bridge deck in October 1986. The sealing was necessary to prevent deicing salt brine from entering a substantial number of transverse cracks that coincided with the epoxy-coated top steel and unprotected bottom steel. HMWM resin is a three-component product composed of a monomer, a cumene hydroperoxide initiator, and a cobalt naphthenate promoter. The HMWM was applied with a dual spray-bar system and flat-fan nozzles. Initiated monomer delivered through one spray bar was mixed in the air with promoted monomer from the other spray bar. The application rate averaged 0.956 gal/100 sq ft for the tined textured driving lanes. Dry sand was broadcast on the surface at an average coverage of 0.58 lb/sq yd to maintain friction. Coring showed that the HMWM resin penetrated the cracks more than 2 in. deep. Testing of the treated deck yielded friction numbers averaging 33, with a treaded tire compared to 36 prior to treatment. An inspection soon after treatment found five leaky cracks in one of the 15 spans. One inspection during a steady rain showed no leakage, but leakage from numerous cracks occurred during a subsequent rain. A second HMWM application was made on two spans to determine if a double application would prevent leakage. This evaluation has not been completed.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1204, Portland Cement Concrete Modifiers. 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

Monograph Accession #:

01413998

Authors:

Marks, Vernon J

Pagination:

p. 83-88

Publication Date:

1988

Serial:

Transportation Research Record

Issue Number: 1204
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309047749

Features:

Figures (3) ; Photos (2) ; References (3)

Old TRIS Terms:

Subject Areas:

Highways; Materials; I32: Concrete

Files:

TRIS, TRB, ATRI

Created Date:

Nov 30 1989 12:00AM

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