Geometrical and boundary condition effects on restrained shrinkage behavior of UHPFRC slabs

Doo Yeol Yoo, Nemkumar Banthia, Young Soo Yoon

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    Six large Ultra-High-Performance Fiber-Reinforced Concrete (UHPFRC) slabs were fabricated and tested to investigate the restrained shrinkage and cracking behaviors. The use of expanded polystyrene and Teflon sheets with two different slab thicknesses was considered to improve the shrinkage crack resistance. Free shrinkage was simultaneously measured to evaluate the degree of restraint according to the above test parameters. The test results showed that free shrinkage strains of –689 με to –723 με were obtained after 9 days, and prismatic specimens with a higher exposed surface area-to-volume ratio (S/V) had slightly higher free shrinkage strains than those with a lower S/V. Increasing the concrete slab thickness and using expanded polystyrene and Teflon sheets were effective at reducing the degree of restraint and improving the shrinkage crack resistance of the UHPFRC slabs. Among the various specimens, the slabs with the expanded polystyrene exhibited the lowest degree of restraint by 0.45 after 9 days.

    Original languageEnglish
    Pages (from-to)185-195
    Number of pages11
    JournalKSCE Journal of Civil Engineering
    Volume22
    Issue number1
    DOIs
    Publication statusPublished - 2018 Jan 1

    Bibliographical note

    Publisher Copyright:
    © 2017, Korean Society of Civil Engineers and Springer-Verlag Berlin Heidelberg.

    Keywords

    • Degree of restraint
    • Expanded polystyrene
    • Shrinkage crack resistance
    • Slab
    • Teflon sheet
    • Ultra-high-performance fiber-reinforced concrete

    ASJC Scopus subject areas

    • Civil and Structural Engineering

    Fingerprint

    Dive into the research topics of 'Geometrical and boundary condition effects on restrained shrinkage behavior of UHPFRC slabs'. Together they form a unique fingerprint.

    Cite this