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Acoustic emission monitoring of crack formation during alkali silicanreactivity accelerated mortar bar test

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00475320" target="_blank" >RIV/67985831:_____/17:00475320 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.enggeo.2017.02.009" target="_blank" >http://dx.doi.org/10.1016/j.enggeo.2017.02.009</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.enggeo.2017.02.009" target="_blank" >10.1016/j.enggeo.2017.02.009</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Acoustic emission monitoring of crack formation during alkali silicanreactivity accelerated mortar bar test

  • Original language description

    System of semi-continuous ultrasonic sounding and acoustic emission (AE) monitoring of experimental mortar bars subjected to ultra-accelerated (14-days lasting) alkali -silica reactivity (ASR) test was developed and assessed for refined interpretation of early stages of reaction. The experiments were carried out by using four different types of crushed stone (quartz from pegmatite, chert, quartzite, quartz-rich metagreywacke) exhibiting variable ASR potential from non-reactive to reactive. By analysing AE characteristics, these faithfully reflect microstructural changes during the first 3-5 days of the test. Early formation of ASR damage phenomena within aggregate particles showing variable ASR potential is accompanied with non-linear interaction of propagating or released acoustic waves. During the second half of the test, rapid attenuation of AE activity, specifically in the case of the two most reactive types of aggregates (quartz metagreywacke and chert), reflects deterioration of the (micro) structure of tested materials and decrease of quality of contacts between steel wave guides and experimental mortar bars. The later fact presents major limitation of current approach during later stages of ultra accelerated mortar bar test. Despite this limitation, ultrasonic sounding and AE monitoring seems to be much more sensitive to early stages of development of brittle damage phenomena due to ASR than standard dilation reading is. This has been confirmed by subsequent direct observation of damage phenomena by backscattered imaging in scanning electron microscope.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20501 - Materials engineering

Result continuities

  • Project

    <a href="/en/project/GAP104%2F12%2F0915" target="_blank" >GAP104/12/0915: Quantitative analysis of quartz deformation affecting ASR in concrete</a><br>

  • Continuities

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

Others

  • Publication year

    2017

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Engineering Geology

  • ISSN

    0013-7952

  • e-ISSN

  • Volume of the periodical

    220

  • Issue of the periodical within the volume

    MAR 30

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    8

  • Pages from-to

    175-182

  • UT code for WoS article

    000398872200017

  • EID of the result in the Scopus database

    2-s2.0-85013243629