Combined Effect of Expansive Cement and Internal Curing to Mitigate Shrinkage Cracking in Bridge Decks

ABSTRACTConcrete cracking due to restrained drying shrinkage is a widespread problem that could happen to any structural element including bridge decks. One of the main causes of bridge deck cracking is the development of tensile stresses due to restrained drying shrinkage. Cracks allow harmful substances such as water and deicing salts to penetrate the deck and initiate corrosion. This research investigates the effects of using lightweight aggregate (LWA) on enhancing the performance of expansive Type-K cement. Four large-scale bridge decks of 2 m×3 m were built using four different types of concrete mixtures: (1) a mixture containing 100% Portland cement, (2) a mixture incorporating expansive Type-K cement, (3) a mixture containing internally cured fine lightweight aggregate (LWA), and (4) a combined mixture of Type-K cement and internally cured LWA. The combined mixture uses internal water from LWA to enhance the expansion of Type-K cement and produce compressive stress in the concrete; and eventually reduces the onset of cracking.

• Record URL:
  • https://doi.org/10.1061/9780784482230.006
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482230
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers 2019
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Rahman, Mohammad
  • Gonzalez, Dorys
  • Hindi, Riyadh
• Conference:
  • Structures Congress 2019
  • Location: Orlando Florida, United States
  • Date: 2019-4-24 to 2019-4-27
• Publication Date: 2019-4

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 50-56
• Monograph Title: Structures Congress 2019: Bridges, Nonbuilding and Special Structures, and Nonstructural Components

Subject/Index Terms

• TRT Terms: Bridge decks; Concrete curing; Cracking; Expansive cement; Lightweight aggregates; Scale models; Shrinkage
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01723000
• Record Type: Publication
• ISBN: 9780784482230
• Files: TRIS, ASCE
• Created Date: Nov 20 2019 9:42AM