Methods and Diagnostic Techniques Used to Analyse the Technical State of Reinforced Concrete Structures

Hoła, Jerzy; Wrocławska, Politechnika; Runkiewicz, L.; Warszawie, Instytut Techniki Budowlanej w

doi:10.30540/sae-2018-030

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Diagnostic tests allow evaluation of the condition of reinforced concrete prestressed girder structures, and the degree of deterioration of individual elements, and determination of the characteristics of concrete and reinforcement, and the causes of damage, and prediction of the durability of the structure [ 46 ]. In the diagnostic testing of building structures or their elements, the actual condition and the actual conditions of their operation should be taken into account, and current standards should be used in the assessment.…”

Section: Methodsmentioning

confidence: 99%

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

et al. 2021

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The paper discusses the problems connected with long-term exploitation of reinforced concrete post-tensioned girders. The scale of problems in the world related to the number of cable post-tensioned concrete girders built in the 1950s and still in operation is very large and possibly has very serious consequences. The paper presents an analysis and evaluation of the results of measurements of the deflection and strength and homogeneity of concrete in cable–concrete roof girders of selected industrial halls located in Poland, exploited for over 50 years. On the basis of the results of displacement monitoring in the years 2009–2020, the maximum increments of deflection of the analyzed girders were determined. Non-destructive, destructive, and indirect evaluation methods were used to determine the compressive strength of concrete. Within the framework of the indirect method recommended in standard PN-EN 13791, a procedure was proposed by the authors to modify the so-called base curve for determining compressive strength. Due to the age of the analyzed structural elements, a correction factor for the age of concrete was taken into account in the strength assessment. The typical value of the characteristic compressive strength is within the range 20.3–28.4 MPa. As a result of the conducted tests, the concrete class assumed in the design was not confirmed, and its classification depended on the applied test method. The analyzed girders, in spite of their long-term exploitation, can be still used for years on the condition that regular periodical inspections of their technical condition are carried out. The authors emphasize the necessity for a permanent and cyclic diagnostic process and monitoring of the geometry of girders, as they are expected to operate much longer than was assumed by their designers.

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Section: Methodsmentioning

confidence: 99%

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

et al. 2021

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“…In the opposite situation, when the structure of the element changes favorably into the interior, the potential inherent in the element may not be exploited [15]. Therefore, in order [10], [17]. Ultrasonic testing of strength parameters is possible for steel and concrete [8], [18], [19] while for timber they are limited to the modulus of elasticity test [20].…”

Section: Review Of Ndt Methodsmentioning

confidence: 99%

Non-Destructive Testing Methods as a Main Tool Supporting Effective Waste Management in Construction Processes

Jaskowska-Lemańska

Sagan

2019

Archives of Civil Engineering

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Construction and demolition (C&D) waste management should be accordance with the waste management hierarchy. In practice, C&D waste are often downcycling. It is the result of many factors, including lack of awareness about the value inherent in waste. The paper presents analysis of the adaptability of non-destructive testing (NDT) methods for technical assessment of waste properties. As part of the work, non-destructive testing methods were described and classified in accordance with material and the features they enable testing. The publication presents examples of the use of NDT in the recovery of building materials during construction projects, in the field of influence of technical information of waste on the way it is managed. Finally, a scheme of waste management process during the renovation of an object with the application of NDT methods was presented.

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“…In addition, other non-destructive methods may be useful in identifying the bonding between the layers in the repaired concrete elements. Using the acoustic methods [6], it is possible to obtain parameters on the surface of the repair overlay.…”

Section: Introductionmentioning

confidence: 99%

Identification of the Interlayer Bond Between Repair Overlay and Concrete Using Nondestructive Testing, an Artificial Neural Network and Principal Component Analysis

Czarnecki¹,

Sadowski²,

Hoła³

2019

Proceedings of the Creative Construction Conference 2019

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Methods and Diagnostic Techniques Used to Analyse the Technical State of Reinforced Concrete Structures

Cited by 4 publications

References 6 publications

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

Elements of Pathway for Quick and Reliable Health Monitoring of Concrete Behavior in Cable Post-Tensioned Concrete Girders

Non-Destructive Testing Methods as a Main Tool Supporting Effective Waste Management in Construction Processes

Identification of the Interlayer Bond Between Repair Overlay and Concrete Using Nondestructive Testing, an Artificial Neural Network and Principal Component Analysis

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