Abstract The understanding and controlling of the restrained shrinkage is critical for the application of ultra high performance concrete (UHPC). This study made an analysis of restrained shrinkage mechanism of four kinds of UHPCs based on the direct tensile test accompanied with acoustic emission (AE) source location, free shrinkage test and restrained shrinkage test. The effects of UHPC tensile properties (strain softening or strain hardening) and high performance calcium sulphoaluminate (HCSA, a new kind of expansion agent) dosages (0%, 3% and 6% by mass of total binder) were investigated. The restrained shrinkage cracking mechanism of strain hardening UHPC and strain softening UHPC was analyzed based on AE analysis method under direct tensile loading. The results indicates that strain hardening UHPC shows multiple micro-defects to relax the restrained tensile stress marginally while strain softening UHPC shows several hairline cracks to relax the restrained tensile stress evidently. In ASTM C1581-04 ring test, the restrained shrinkage of strain hardening UHPC with HCSA dosage of 0%, 3% and 6% at 80d is 141 με, 96 με and 16 με, respectively. The HCSA expansion agent can effectively reduce the restrained shrinkage of UHPC and the influence on the structure.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Restrained Shrinkage Mechanism of Ultra High Performance Concrete


    Contributors:
    Wang, Jun-Yan (author) / Bian, Chen (author) / Xiao, Ru-Cheng (author) / Ma, Biao (author)

    Published in:

    Publication date :

    2019-09-05


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Restrained Shrinkage Mechanism of Ultra High Performance Concrete

    Wang, Jun-Yan / Bian, Chen / Xiao, Ru-Cheng et al. | Online Contents | 2019



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

    Yoo, Doo-Yeol / Banthia, Nemkumar / Yoon, Young-Soo | Springer Verlag | 2017


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

    Yoo, Doo-Yeol / Banthia, Nemkumar / Yoon, Young-Soo | Online Contents | 2018