Mechanical Characterization of Enamel Coated Steel Bars

Steel bars can be coated with enamels or glass to reduce or eliminate the tendency of steel corrosion in various applications, such as reinforced concrete (RC) decks, beams and columns. The chemical bond between enamel and steel materials is a key to make an enamel-coated steel corrosion free. Therefore, it is essential to characterize the mechanical and bonding properties of enamel-coated steels. To show competitiveness, the performance and cost of enamel-coated steel bars must be compared with those of the current technology such as epoxy reinforcing steel bars. In various applications of an enamel-coated steel bar, potential limit states include cracking and spalling of enamel coatings, surface impact damage of coatings, corrosion of steel components, and debonding of enamel from its coated steel bar. The proposed study is aimed at quantifying the ruggedness of enamel coatings and their bonding with steel and concrete. In a short term, the objectives of this particular study are to demonstrate that enamel-coated steel bars are comparable to conventional steel bars in mechanical properties and demonstrate that they are superior to epoxy bars in field handling and less susceptible to impact damage. The specific scope of work includes: * Cracking and spalling tests of enamel coatings with tensile specimens in order to understand the levels of the tensile deformation in steel bars that correspond to cracking of the enamel materials and their spalling off the steel bars, respectively. * Impact resistance tests of enamel coatings with the projectile impact on enamel coated steel bars and on epoxy coated bars. * Toughness tests of enamel-coated steel bars to document the minimum ratio of bent bars or the minimum number of bending cycles applied on bent bars before cracking. * Thermal tests for the compatibility between enamel and steel with tensile specimens.

• Record URL:
  http://utc.mst.edu/research/R208.html

Language

• English

Project

• Status: Completed
• Funding: $5000.00
• Contract Numbers:

  DTRT06-G-0014

  00018130

• Sponsor Organizations:

  Department of Transportation

  Research and Special Programs Administration
  1200 New Jersey Avenue, SE
  Washington, DC    20590
• Performing Organizations:

  Center for Infrastructure Engineering Studies

  Missouri University of Science and Technology
  Rolla, MO  United States  65409
• Principal Investigators:

  Chen, Genda

• Start Date: 20070701
• Expected Completion Date: 0
• Actual Completion Date: 20111231
• Source Data: RiP Project 15197

Subject/Index Terms

• TRT Terms: Cracking; Debonding; Enamels; Material reinforcement; Reinforced concrete; Research projects; Spalling; Steel; Tensile strength; Tension tests
• Subject Areas: Highways; Research; I30: Materials;

Filing Info

• Accession Number: 01466352
• Record Type: Research project
• Source Agency: Center for Infrastructure Engineering Studies
• Contract Numbers: DTRT06-G-0014, 00018130
• Files: UTC, RIP, USDOT
• Created Date: Jan 3 2013 3:14PM