Characterization of old/repairing structural concrete through mechanical fracture parameters.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Characterization of old/repairing structural concrete through mechanical fracture parameters.

Popis výsledku v původním jazyce

Structural concrete of the building of Vítkovice railway station from 1970s and repairing concrete are characterized via mechanical fracture parameters. Together twelve core-drilled cylindrical specimens with diameter of 75 mm were provided by a Chevron type notch of depth of 12 mm. Three-point bending fracture tests were conducted on these specimens supported as beams with the span of 170/180 mm. Load vs. deflection and load vs. crack mouth opening displacement diagrams were recorded from which modulus of elasticity (E), fracture toughness (KIc) and fracture energy (GF) were determined using linear elastic fracture mechanics approach and work-of-fracture method. Mean values (coefficient of variation) of these parameters for old/repairing concrete were obtained as follows: E = 39.4/39.9 GPa (29/15 %), KIc = 0.90/1.38 MPa m1/2 (19/13 %), GF = 174.0/116.4 J/m2 (26/19 %).

Název v anglickém jazyce

Characterization of old/repairing structural concrete through mechanical fracture parameters.

Popis výsledku anglicky

Structural concrete of the building of Vítkovice railway station from 1970s and repairing concrete are characterized via mechanical fracture parameters. Together twelve core-drilled cylindrical specimens with diameter of 75 mm were provided by a Chevron type notch of depth of 12 mm. Three-point bending fracture tests were conducted on these specimens supported as beams with the span of 170/180 mm. Load vs. deflection and load vs. crack mouth opening displacement diagrams were recorded from which modulus of elasticity (E), fracture toughness (KIc) and fracture energy (GF) were determined using linear elastic fracture mechanics approach and work-of-fracture method. Mean values (coefficient of variation) of these parameters for old/repairing concrete were obtained as follows: E = 39.4/39.9 GPa (29/15 %), KIc = 0.90/1.38 MPa m1/2 (19/13 %), GF = 174.0/116.4 J/m2 (26/19 %).

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 12th Central European Congress on Concrete Engineering - Innovative materials and technologies for concrete structures

ISBN

978-963-12-9651-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

481-486

Název nakladatele

Hungarian Group of fib

Místo vydání

Budapest

Místo konání akce

Tokaj

Datum konání akce

31. 8. 2017

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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