VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • The use of frequency spectrum of ultrasonic P-waves to monitor the setting process of cement pastes
    Trtnik, Gregor, 1979- ; Gams, Matija, gradbeništvo
    In this paper, a possibility of using a frequency spectrum of ultrasonic P-waves to monitor the formation of structure of cement pastes at early ages is studied. A new parameter, labeled as a TG ... parameter, is defined as a dimensionless ratio between maximum amplitudes of two dominant frequency ranges that appear in a frequency spectrum of received ultrasound signals. Four stages and three characteristic points can be identified on the TG-vs.-time graphs, indicating that the development of the frequency spectrum is closely related to the setting phenomena. By comparing the TG parameter with the P-wave velocity and temperature evolutions in time, important milestones in the process of formation of microstructure were identified, suchas the time of reduced workability and a period of intensive setting. The combined use of P-wave velocity and TG parameter results in a comprehensive ultrasonic method that gives a more complete picture of setting.
    Vir: Cement and concrete research. - ISSN 0008-8846 (vol. 43, issue 1, jan. 2013, str. 1-11)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 1920103

    Povezava(-e):

    http://www.sciencedirect.com/science/article/pii/S0008884612002153
    DOI

vir: Cement and concrete research. - ISSN 0008-8846 (vol. 43, issue 1, jan. 2013, str. 1-11)
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