2013 Session: 799

• Internal Curing of Concrete Bridge Decks in Utah: Preliminary Evaluation
  Abstract: The objectives of this research were to 1) monitor in-situ bridge deck properties such as moisture and diffusivity for both conventional concrete and concrete containing pre-wetted lightweight fine aggregate (LWFA), which is intended to provide internal curing, 2) compare deck performance in terms of early-age cracking, and 3) evaluate the concrete mixtures in the laboratory in terms of compressive strength and chloride permeability using cylinders cast in the field at the time of deck construction. The research scope included four bridges, two constructed using conventional concrete and two containing pre-wetted LWFA, in northern Utah. Data from sensors embedded in the concrete decks indicate that the moisture content of the internally cured concrete was 2 to 3 percent higher at 28 days than the moisture content of the conventional concrete. Although the internally cured concrete had a higher moisture content, the electrical conductivity values were approximately the same for all the decks after a couple of months, suggesting that the two types of concrete have similar diffusivity. At 28 days, the average strength of the internally cured concrete was 1 percent higher than that of the conventional concrete, and the internally cured concrete passed between 2 and 30 percent less current during the rapid chloride permeability test than the conventional concrete. After 2 months, three to five cracks about 0.2 to 0.3 mm in width were found on each of the conventional concrete bridge decks, while no visible signs of cracking were found in the bridge decks with internal curing.
  Authors: Guthrie, W. Spencer; Yaede, Joseph M.
  Authors: Guthrie, W. Spencer; Yaede, Joseph M.
  Year: 2013
  Document Type: Paper
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: 13-5374
• Internal Curing of Concrete Bridge Decks in Utah: Preliminary Evaluation
  Authors: Yaede, Joseph
  Authors: Yaede, Joseph
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: 13-5374
• Internal Curing: Research Findings and Observations from Implementation
  Authors: Weiss, William
  Authors: Weiss, William
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5875
• Deicer Scaling of Concrete Prepared with Curing Compounds
  Authors: Cramer, Steven
  Authors: Cramer, Steven
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5877
• Improving FHWA SmartCure for Practical Implementation
  Authors: Ruiz, J.
  Authors: Ruiz, J.
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5878
• Evaluation of Concrete Curing Effectiveness Using Concrete Abrasion Testing in Texas
  Authors: Zollinger, Dan
  Authors: Zollinger, Dan
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5879
• Implementing Lithium Cure on Bridge Decks in Arkansas
  Authors: Tamayo, Sarah
  Authors: Tamayo, Sarah
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5881
• Evaluation of Photocatalytic Efficiency of Nano-TIO2-Modified Pavements Integrated Within Concrete Curing Compounds
  Authors: Hassan, Marwa
  Authors: Hassan, Marwa
  Year: 2013
  Document Type: Presentation
  Subject: Construction; Materials; Pavements
  Session: 799
  Paper Number: P13-5880