Title page for ETD etd-05232001-104900


Type of Document Master's Thesis
Author Kyle, Nathan Lawrence
Author's Email Address nkyle@vt.edu
URN etd-05232001-104900
Title Subsidence Cracking of Concrete Over Steel Reinforcement Bar in Bridge Decks
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Weyers, Richard E. Committee Chair
Barker, Richard M. Committee Member
Easterling, William Samuel Committee Member
Keywords
  • epoxy coated
  • concrete clear cover
  • cracking
  • settlement
  • Subsidence
Date of Defense 2001-05-01
Availability unrestricted
Abstract
It is known that subsidence cracking may cause premature deterioration of concrete slab structures in salt laden environments. Chlorides from either deicing salts or marine environments may cause chloride-induced corrosion of the reinforcing steel resulting in spalling of the cover concrete. Concrete specimens with 16 mm (# 5) diameter bars were cast with various cover depths, bar spacing and two concrete mixture types to determine the influence that epoxy coated reinforcement, cement type and bar spacing may have on the probability of subsidence cracking in bridge deck slabs. It was determined that there is not a significant difference in the probability of cracking of concrete between concrete cast with epoxy coated reinforcing steel and bare reinforcing steel. Concrete subsidence cracking was found to be dependent upon the clear cover depth and cement type.

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