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Contribution to the issue of evaluating the compressive strength of concrete exposed to high temperatures using the Schmidt rebound hammer

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F16%3APU115647" target="_blank" >RIV/00216305:26110/16:PU115647 - isvavai.cz</a>

  • Result on the web

    <a href="https://link.springer.com/article/10.1134/S1061830916010046" target="_blank" >https://link.springer.com/article/10.1134/S1061830916010046</a>

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Contribution to the issue of evaluating the compressive strength of concrete exposed to high temperatures using the Schmidt rebound hammer

  • Original language description

    Concrete properties change as a result of ambient conditions. The internal microstructure changes under high temperatures. As a consequence, this change affects both physical and mechanical properties of concrete and therefore the parameters determined from non-destructive testing. It was determined that for concrete exposed to temperatures in the range of 200 °C to 400 °C the rebound number measured by the rebound hammer is approximately 9 % higher after heat load than for wet concrete placed in a standard environment. Temperatures from 600 °C to 800 °C cause a drop in the rebound number, which correlates with a decrease in the concrete´s compressive strength. A strength dependency was established for the N-type Schmidt rebound hammer expressing the relationship between the rebound number and the compressive strength of concrete exposed to heat load, which is characterized by a high correlation between variables (correlation coefficient is 0.98). To estimate the compressive strength of concrete in a structure which has been exposed by fire, can be used both the calculated strength relationship, both the calibration curves for N-type Schmidt rebound hammer calculated by manufacturer, eventually the basic curve from CSN EN 13791. If the calibration equation for N-type Schmidt rebound hammer or basic curve of CSN EN 13791 is taken, the calculated strength for the rebound numbers should be lowered using the corrective coefficient, the value of which is 0.54, respectively 0.65.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>ost</sub> - Miscellaneous article in a specialist periodical

  • CEP classification

  • OECD FORD branch

    20101 - Civil engineering

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2016

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Defektoskopiya

  • ISSN

    0130-3082

  • e-ISSN

  • Volume of the periodical

    2016

  • Issue of the periodical within the volume

    01

  • Country of publishing house

    RU - RUSSIAN FEDERATION

  • Number of pages

    11

  • Pages from-to

    55-66

  • UT code for WoS article

  • EID of the result in the Scopus database