Detail publikace

Monitoring Early-age Concrete with the Acoustic-emission Method and Determining the Change in the Electrical Properties

PAZDERA, L. TOPOLÁŘ, L. KOŘENSKÁ, M. VYMAZAL, T. SMUTNÝ, J. BÍLEK, V.

Originální název

Monitoring Early-age Concrete with the Acoustic-emission Method and Determining the Change in the Electrical Properties

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Concrete is the most popular building composite material (CM). Its long-term aging properties depend on the mixture, the setting and the curing. When concrete is produced and used in the place where we want it to be for the whole of its life, it is very sensitive and easily ruined. Curing is one of the things that we do to keep concrete protected during the first week or so of its life: we maintain proper temperature (neither too hot nor too cold) and dampness. The acoustic-emission method and the electrical-property measurement technique are applied to monitor early-age concrete. The relationships between the acousticemission activity, the temperature and the electrical properties, e.g., the resistivity and the capacity of concrete at an early age were studied in this research. W. Chen et al. studied the microstructure development of hydrating cement pastes during early ages using non-destructive methods including the ultrasound P-wave propagation-velocity measurement and non-contact electrical-resistivity tests. Nevertheless, there are not many references about the continuous study of the properties of concrete during an early age. A long-time monitoring of concrete properties is necessary to determine its lifetime and quality. The acoustic-emission method was proven to be a very advantageous tool for a non-destructive monitoring of structural microchanges during the lifetime of concrete. The differences between hardened concrete mixtures detected with acoustic emission can partly determine their properties at the age of 28 d. The basic concrete property is its compressive strength after 28 d; nevertheless, this can change over a long time period, thus a continuous measuring needs to be applied.

Klíčová slova

concrete, acoustic emission, electrical properties, early age, lifetime, curing

Autoři

PAZDERA, L.; TOPOLÁŘ, L.; KOŘENSKÁ, M.; VYMAZAL, T.; SMUTNÝ, J.; BÍLEK, V.

Rok RIV

2015

Vydáno

6. 10. 2015

Nakladatel

Inštitut za kovinske materiale in tehnologije Ljubljana

Místo

Ljublana

ISSN

1580-2949

Periodikum

Materiali in tehnologije

Ročník

49

Číslo

5

Stát

Slovinská republika

Strany od

703

Strany do

707

Strany počet

5

URL

http://mit.imt.si/Revija/izvodi/mit155/pazdera.pdf

BibTex

@article{BUT117277,
  author="Luboš {Pazdera} and Libor {Topolář} and Marta {Kořenská} and Tomáš {Vymazal} and Jaroslav {Smutný} and Vlastimil {Bílek}",
  title="Monitoring Early-age Concrete with the Acoustic-emission Method and Determining the Change in the Electrical Properties",
  journal="Materiali in tehnologije",
  year="2015",
  volume="49",
  number="5",
  pages="703--707",
  doi="10.17222/mit.2014.112",
  issn="1580-2949",
  url="http://mit.imt.si/Revija/izvodi/mit155/pazdera.pdf"
}