A pilot study of methods for measuring the residual properties of concrete exposed to elevated temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F18%3APU128194" target="_blank" >RIV/00216305:26110/18:PU128194 - isvavai.cz</a>

Výsledek na webu

<a href="http://mit.imt.si/Revija/izvodi/mit183/rozsypalova.pdf" target="_blank" >http://mit.imt.si/Revija/izvodi/mit183/rozsypalova.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2017.004" target="_blank" >10.17222/mit.2017.004</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A pilot study of methods for measuring the residual properties of concrete exposed to elevated temperatures

Popis výsledku v původním jazyce

This pilot study and literature review was performed with the purpose of preparing for subsequent extensive research focused on the design of effective diagnostic methods for determining the current state of concrete structures damaged by high temperatures during exposure to fire. During the pilot study, specimens were prepared from ordinary concrete with dense aggregate, and were subsequently loaded by temperatures of 200, 400, 600, 800, 1000 and 1200 °C. One set of the specimens was kept as reference specimens without thermal loading. After the thermal loading of the six sets of specimens had cooled, selected non-destructive tests were performed; namely the SilverSchmidt hammer rebound test, the ultrasonic pulse velocity test, and the impact-echo method. Furthermore, the compressive strength of the specimens was determined destructively to provide reference data. The experiments indicated the fact that the commonly used non-destructive methods are not suitable for estimating the compressive strength of concrete exposed to temperatures higher than 600 °C. This indicates that it is necessary to derive new calibration relationships for such conditions. It was also found that an apparent increase occurred in the hardness and modulus of elasticity of the tested concrete when it was exposed to temperatures greater than 1000 °C.

Název v anglickém jazyce

A pilot study of methods for measuring the residual properties of concrete exposed to elevated temperatures

Popis výsledku anglicky

This pilot study and literature review was performed with the purpose of preparing for subsequent extensive research focused on the design of effective diagnostic methods for determining the current state of concrete structures damaged by high temperatures during exposure to fire. During the pilot study, specimens were prepared from ordinary concrete with dense aggregate, and were subsequently loaded by temperatures of 200, 400, 600, 800, 1000 and 1200 °C. One set of the specimens was kept as reference specimens without thermal loading. After the thermal loading of the six sets of specimens had cooled, selected non-destructive tests were performed; namely the SilverSchmidt hammer rebound test, the ultrasonic pulse velocity test, and the impact-echo method. Furthermore, the compressive strength of the specimens was determined destructively to provide reference data. The experiments indicated the fact that the commonly used non-destructive methods are not suitable for estimating the compressive strength of concrete exposed to temperatures higher than 600 °C. This indicates that it is necessary to derive new calibration relationships for such conditions. It was also found that an apparent increase occurred in the hardness and modulus of elasticity of the tested concrete when it was exposed to temperatures greater than 1000 °C.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA16-18702S" target="_blank" >GA16-18702S: Problematika porušování v blízkosti rozhraní plniva a matrice kompozitů na silikátové bázi (AMIRI)</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Materiali in tehnologije

ISSN

1580-2949

e-ISSN

1580-3414

Svazek periodika

52

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

10

Strana od-do

243-252

Kód UT WoS článku

000435102200001

EID výsledku v databázi Scopus

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