Influence of ring size on the restrained shrinkage behavior of ultra high performance fiber reinforced concrete

Doo Yeol Yoo, Jung Jun Park, Sung Wook Kim, Young Soo Yoon

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

In order to evaluate the restrained shrinkage behavior of ultra high performance fiber reinforced concrete (UHPFRC), ring-tests with three different wall thicknesses and two different diameters of inner steel ring were performed. Partially exposed free shrinkage and tensile tests were carried out simultaneously to assess the theoretical elastic stress, stress relaxation, degree of restraint and potential for cracking in the concrete. Test results indicated that the UHPFRC ring specimen with a thicker steel ring demonstrated a faster theoretical cracking time, higher stress relaxation and degree of restraint than that of a thinner steel ring, whereas those factors were rarely affected by the diameter of the inner steel ring. About 39-65 % of the theoretical elastic stress was relaxed by the sustained interface pressure. Since the actual residual tensile stress of all specimens was less than the tensile strength, the computed cracking potential varied from 0.43 to 0.7, and thus no shrinkage crack was observed. Finally, the degree of restraint provided a linear relationship with the ratio of steel and concrete wall thickness.

Original languageEnglish
Pages (from-to)1161-1174
Number of pages14
JournalMaterials and Structures/Materiaux et Constructions
Volume47
Issue number7
DOIs
Publication statusPublished - 2014 Jul

Bibliographical note

Funding Information:
Acknowledgments This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2012R1A2A1A05026406) and carried out as a partial research of the ‘‘Development of Ultra High Performance Concrete for Hybrid Cable Stayed Bridges’’ in the Korea Institute of Construction Technology.

Keywords

  • Cracking potential
  • Degree of restraint
  • Ring-test
  • Shrinkage
  • Stress relaxation
  • Ultra high performance fiber reinforced concrete

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials

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