Dynamic elastic properties of hardened experimental mortar bars affected by accelerated alkali-silica reactivity test: a laboratory approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F21%3AN0000025" target="_blank" >RIV/46356088:_____/21:N0000025 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/21:00550773 RIV/00216208:11310/21:10435953

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s10064-021-02251-0" target="_blank" >https://link.springer.com/article/10.1007/s10064-021-02251-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10064-021-02251-0" target="_blank" >10.1007/s10064-021-02251-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Dynamic elastic properties of hardened experimental mortar bars affected by accelerated alkali-silica reactivity test: a laboratory approach

Popis výsledku v původním jazyce

The evaluation of ASR sensitivity of aggregates is of utmost importance due to durability and safety of structures and also due to economic reasons related to repairs or replacements of ASR-affected concrete. Laboratory tests for ASR detection rely mostly on petrographic examination and on laboratory expansion tests. The latter are mostly expressed in terms of length change (expansion) of experimental mortar bars subjected to the effect of alkaline environment. Along with this, recording of the propagating ultrasonic wave signal can increase reliability of test results. In the recent study, dynamic elastic properties of experimental mortar bars were recorded in both normal setting/hardening state (first 28 days) and in the conditions of accelerated ageing conditions in alkaline solution with elevated temperature (another 37 days). Setting/hardening of the studied materials under normal conditions was manifested by quasi-exponential P- and S-wave ultrasonic velocity increase. However, alkaline solution resulted in the rapid development of ASR phenomena in reactive aggregates and significant change of elastic wave velocities and other dynamic elastic parameters. Comparing various ultrasonic characteristics, dynamic ones (amplitudes, frequencies) proved significantly higher sensitivity and tighter correlation to length changes (expansion) cause by ASR than did the kinematic ones (elastic wave velocities, dynamic elastic moduli).

Název v anglickém jazyce

Dynamic elastic properties of hardened experimental mortar bars affected by accelerated alkali-silica reactivity test: a laboratory approach

Popis výsledku anglicky

The evaluation of ASR sensitivity of aggregates is of utmost importance due to durability and safety of structures and also due to economic reasons related to repairs or replacements of ASR-affected concrete. Laboratory tests for ASR detection rely mostly on petrographic examination and on laboratory expansion tests. The latter are mostly expressed in terms of length change (expansion) of experimental mortar bars subjected to the effect of alkaline environment. Along with this, recording of the propagating ultrasonic wave signal can increase reliability of test results. In the recent study, dynamic elastic properties of experimental mortar bars were recorded in both normal setting/hardening state (first 28 days) and in the conditions of accelerated ageing conditions in alkaline solution with elevated temperature (another 37 days). Setting/hardening of the studied materials under normal conditions was manifested by quasi-exponential P- and S-wave ultrasonic velocity increase. However, alkaline solution resulted in the rapid development of ASR phenomena in reactive aggregates and significant change of elastic wave velocities and other dynamic elastic parameters. Comparing various ultrasonic characteristics, dynamic ones (amplitudes, frequencies) proved significantly higher sensitivity and tighter correlation to length changes (expansion) cause by ASR than did the kinematic ones (elastic wave velocities, dynamic elastic moduli).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA18-08826S" target="_blank" >GA18-08826S: Odolnost vůči křehkému porušení: význam petrografických / mechanických dat pro technologicko-mechanické vlastnosti a životnost drceného kamene</a><br>

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Bulletin of Engineering Geology and the Environment

ISSN

1435-9529

e-ISSN

—

Svazek periodika

80

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

13

Strana od-do

8921-8933

Kód UT WoS článku

000642839800002

EID výsledku v databázi Scopus

2-s2.0-85105130456