Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests

This paper presents the results of an experimental program aimed at the assessment of the freeze–thaw (F–T) resistance of concrete based on the evaluation of fracture tests accompanied by acoustic emission measurements. Two concretes of similar mechanical characteristics were manufactured for the ex...

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Autores principales:	Barbara Kucharczyková, Hana Šimonová, Dalibor Kocáb, Libor Topolář
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	freeze–thaw fracture toughness energy double-K crack extension Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/5f0b7da178014904a58ec1e1093d70f5
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spelling	oai:doaj.org-article:5f0b7da178014904a58ec1e1093d70f52021-11-11T17:57:03ZAdvanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests10.3390/ma142163781996-1944https://doaj.org/article/5f0b7da178014904a58ec1e1093d70f52021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6378https://doaj.org/toc/1996-1944This paper presents the results of an experimental program aimed at the assessment of the freeze–thaw (F–T) resistance of concrete based on the evaluation of fracture tests accompanied by acoustic emission measurements. Two concretes of similar mechanical characteristics were manufactured for the experiment. The main difference between the C1 and C2 concrete was in the total number of air voids and in the A300 parameter, where both parameters were higher for C1 by about 35% and 52%, respectively. The evaluation of the fracture characteristics was performed on the basis of experimentally recorded load–deflection and load–crack mouth opening displacement diagrams using two different approaches: linear fracture mechanics completed with the effective crack model and the double-K model. The results show that both approaches gave similar results, especially if the nonlinear behavior before the peak load was considered. According to the results, it can be stated that continuous AE measurement is beneficial for the assessment of the extent of concrete deterioration, and it suitably supplements the fracture test evaluation. A comparison of the results of fracture tests with the resonance method and splitting tensile strength test shows that all testing methods led to the same conclusion, i.e., the C1 concrete was more F–T-resistant than C2. However, the fracture test evaluation provided more detailed information about the internal structure deterioration due to the F–T exposure.Barbara KucharczykováHana ŠimonováDalibor KocábLibor TopolářMDPI AGarticlefreeze–thawfracturetoughnessenergydouble-Kcrack extensionTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6378, p 6378 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	freeze–thaw fracture toughness energy double-K crack extension Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	freeze–thaw fracture toughness energy double-K crack extension Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Barbara Kucharczyková Hana Šimonová Dalibor Kocáb Libor Topolář Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
description	This paper presents the results of an experimental program aimed at the assessment of the freeze–thaw (F–T) resistance of concrete based on the evaluation of fracture tests accompanied by acoustic emission measurements. Two concretes of similar mechanical characteristics were manufactured for the experiment. The main difference between the C1 and C2 concrete was in the total number of air voids and in the A300 parameter, where both parameters were higher for C1 by about 35% and 52%, respectively. The evaluation of the fracture characteristics was performed on the basis of experimentally recorded load–deflection and load–crack mouth opening displacement diagrams using two different approaches: linear fracture mechanics completed with the effective crack model and the double-K model. The results show that both approaches gave similar results, especially if the nonlinear behavior before the peak load was considered. According to the results, it can be stated that continuous AE measurement is beneficial for the assessment of the extent of concrete deterioration, and it suitably supplements the fracture test evaluation. A comparison of the results of fracture tests with the resonance method and splitting tensile strength test shows that all testing methods led to the same conclusion, i.e., the C1 concrete was more F–T-resistant than C2. However, the fracture test evaluation provided more detailed information about the internal structure deterioration due to the F–T exposure.
format	article
author	Barbara Kucharczyková Hana Šimonová Dalibor Kocáb Libor Topolář
author_facet	Barbara Kucharczyková Hana Šimonová Dalibor Kocáb Libor Topolář
author_sort	Barbara Kucharczyková
title	Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
title_short	Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
title_full	Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
title_fullStr	Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
title_full_unstemmed	Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests
title_sort	advanced evaluation of the freeze–thaw damage of concrete based on the fracture tests
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5f0b7da178014904a58ec1e1093d70f5
work_keys_str_mv	AT barbarakucharczykova advancedevaluationofthefreezethawdamageofconcretebasedonthefracturetests AT hanasimonova advancedevaluationofthefreezethawdamageofconcretebasedonthefracturetests AT daliborkocab advancedevaluationofthefreezethawdamageofconcretebasedonthefracturetests AT libortopolar advancedevaluationofthefreezethawdamageofconcretebasedonthefracturetests
_version_	1718431944411185152

Advanced Evaluation of the Freeze–Thaw Damage of Concrete Based on the Fracture Tests

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