Evaluation Of Concrete Bridge Deck Mixtures Using Shrinkage-Ring Tests

Details

• Creators:
  Perez Buenfil, Shamel ; Higgins, John ; Pinto, Cesar Gerardo Freyre ; Tanner, Jennifer Eisenhauer
• Corporate Creators:
  University of Wyoming. Department of Civil and Architectural Engineering
• Corporate Contributors:
  Wyoming. Department of Transportation. Research Center
• Subject/TRT Terms:
  Admixtures Bridge Decks Bridge Management Systems Concrete Concrete Curing Cracking Fibers Fine Aggregates Shrinkage
• Publication/ Report Number:
  WY2504F
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Wyoming
• Edition:
  Final Report
• Contracting Officer:
  Wise, Whitney
• Corporate Publisher:
  Wyoming. Department of Transportation
• Abstract:
  The durability of concrete structures is dependent on the restrained shrinkage behavior of the mix: therefore, evaluating mixtures with different aggregates and mitigation measures is critical. The aim of this document is to evaluate and compare concrete mixture designs using granite and limestone aggregates in combination with different mitigation methods. The mitigation measures evaluated in this work are synthetic macrofibers, shrinkage reducing admixture (SRA), and internal curing (IC). A total of sixteen batches were tested, including individual and combined mitigation strategies using both aggregate types. Two experimental approaches were used to assess restrained shrinkage: single ring and dual ring according to AASTHO T334 and AASTHO T363, respectively. Mechanical properties such as compressive and tensile strength were studied for each mixture. Results indicated that limestone performs better than granite, but the statistical analysis showed that the effect of the aggregate is not significant. For single mitigation measures, internal curing is the most effective at delaying cracking. Incorporating fibers into the mixture roughly doubles the time to crack. Adding SRA into the mix increased the cracking age by 90 percent. The combination of IC with SRA proved to be the most effective measure for extending cracking time.
• Format:
  PDF
• Funding:
  RS0221
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:137935bcef5d7bd59f91b6cda248fba49110439cfa0b34517e3c131c7be568220a9514c369383dc6682fe855ef1c3f602978b69190b36e9ba0fef1fff97ad000
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/87075/dot_87075_DS1.pdf
• File Type:
  [PDF - 2.45 MB ]