Effect of calcium nitrite on the properties of concrete used in bridge decks.

Details

• Creators:
  Ozyildirim, H. Celik
• Corporate Creators:
  Virginia Transportation Research Council (VTRC)
• Subject/TRT Terms:
  • Bridges--Protection
  • Bridges--Corrosion
  • Calcium nitrite
  • Deicing chemicals
• Publication/ Report Number:
  FHWA/VA-93-R4 ; VTRC 93-R4
• Resource Type:
  Tech Report
• Geographical Coverage:
  Virginia
• Edition:
  Final report.May 1988June 1992.
• Corporate Publisher:
  Virginia Transportation Research Council (VTRC)
• Abstract:
  Chloride-induced corrosion of the reinforcing steel in bridge decks can impair its structural integrity and cause spalling, which reduces the ride quality of the deck. One system to prevent corrosion involves the use of corrosion inhibitors in freshly mixed concrete. This study evaluates the properties of field concretes containing the inhibitor, DCI (calcium nitrite) and assesses their field performance over a 3-year period. Comparative tests were made on a two-span bridge, one span of which had epoxy coated bars with regular concrete and the other uncoated bars with concretes containing DCI. The results indicate that the properties of the hardened concretes containing DCI were satisfactory and similar to those of the regular concretes. A conclusion on the effectiveness of DCI was not reached because of the limited time available; consequently, a follow-up evaluation is recommended. At present, the continued use of epoxy-coated reinforcing steel is recommended.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/19310/dot_19310_DS1.pdf
• File Type:
  [PDF - 1.23 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:39ad029a1978758e1fea72b52f6eb06bd27cd8e4a7472c4e78a16a67643a6722e0bf4198ad4d2d8cfe451ec3bac674483989c665caac0f81c70ffba29639a8f5