Multiple corrosion protection systems for reinforced concrete bridge components / [David Darwin and others].

Format:

Book

Government document

Contributor:

Darwin, David

Turner-Fairbank Highway Research Center

University of Kansas. Center for Research

Language:

English

Subjects (All):

Corrosion resistant materials.

Reinforced concrete--Corrosion--Prevention.

Reinforced concrete.

Concrete bridges--Corrosion--Prevention.

Concrete bridges.

Physical Description:

1 online resource (xviii, 237 pages) : color illustrations

Place of Publication:

McLean, VA. : U.S. Dept. of Transportation, Federal Highway Administration, Research, Development and Technology, Turner-Fairbank Highway Research Center, [2011]

Summary:

Eleven systems containing epoxy-coated reinforcement (ECR) in combination with another corrosion-protection system are evaluated using the rapid macrocell, southern exposure, cracked beam, linear polarization resistance, and field tests. The systems include bars pretreated with zinc chromate to improve the adhesion between the epoxy and the reinforcing steel, two epoxies with improved adhesion to the reinforcing steel, one inorganic corrosion inhibitor (calcium nitrite), two organic corrosion inhibitors (Rheocrete 222+ and Hycrete), an epoxy-coated bar with a primer containing microencapsulated calcium nitrite, three epoxy-coated bars with improved adhesion combined with the corrosion inhibitor calcium nitrite, and multiple-coated (MC) bars with an initial 50-microm (2-mil) coating of 98 percent zinc and 2 percent aluminum followed by a conventional epoxy coating. The systems are compared with conventional uncoated reinforcement and conventional ECR. The coatings on all bars are penetrated to simulate the effects of damage during fabrication and placement in the field. The results presented in this report indicate that the coated bars provide superior corrosion protection to the reinforcing steel and that bars with damaged coatings initiate corrosion at chloride contents within concrete that are several times greater and corrode at rates that are typically two orders of magnitude below those exhibited by conventional reinforcement.

Contents:

ch. 1. Introduction

ch. 2. Experimental work

ch. 3. Test results

ch. 4. Evaluation

ch. 5. Conclusions

appendix A. Disbondment of conventional epoxy-coated and MC bars in rapid macrocell test

appendix B. Corrosion loss required to crack concrete containing conventional, epoxy-coated, and galvanized reinforcement

Acknowledgments

References.

Notes:

"November 2011."

"Publication No. FHWA-HRT-11-060."

Includes bibliographical references (pages 231-237).

Title from title screen (viewed on Aug. 28, 2012).

Electronic reproduction. [Place of publication not identified]: HathiTrust Digital Library. 2023.

Other Format:

Print version: Multiple corrosion protection systems for reinforced concrete bridge components

OCLC:

808616406

Access Restriction:

Use copy Restrictions unspecified