Investigation of the Potential for Evaluation of Concrete Flaws Using Nondestructive Testing Methods

Lorenzi, Alexandre; Caetano, Luciane Fonseca; Chies, Josué Argenta; Filho, Luiz Carlos Pinto da Silva

doi:10.1155/2014/543090

Cited by 13 publications

(10 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Exactly for this potentiality, the UPV has been the most investigated NDT in research in Structural Tests and Materials Laboratory of the Federal University of Rio Grande do Sul (LEME/UFRGS). In various research work conducted, on the field and in the laboratory, a technique of UPV was developed, mapping with indirect readings, and confirmed that the method, when properly employed, can offer ease of implementation, fast and suitable fault detection capability [3,4,5,6,7,8,9]. Several researches related to UPV and concrete.…”

Section: Introductionmentioning

confidence: 94%

Analysis of reinforced concrete structures through the ultrasonic pulse velocity: technological parameters involved

Adamatti

Lorenzi

Chies

et al. 2017

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

ResumoApplication of Nondestructive Testing ( NDT) is an interesting strategy to monitor reinforced concrete structures conditions, especially when occur problems like admixture errors, mixing problems, conveying or placing of concrete . Among the NDT methods applicable to concrete, the Ultrasonic Pulse Velocity has been used in various fields of civil engineering due to the ease of operation, low cost, test velocity and that using this test normally do not need repair the surface analyzed. This work aims to study the influence that certain technological variables have on the results obtained through the UPV. Two concrete elements were cast at the laboratory. One element with reinforcement and another without reinforcement. Inside these elements were introduced objects to reproduce possible concrete damages. To facilitate the analysis the results are represent through several images generated by an image software and an statistical analysis software. This study confirm that the correct choice of test parameters is crucial to have a right interpretation.Keywords: nondestructive testing, ultrasonic pulse velocity, reinforced concrete structures.A aplicação de Ensaios Não Destrutivos (END) é uma estratégia interessante para monitorar o estado de conservação das estruturas de concreto armado, principalmente quando ocorrem erros de dosagem, problemas na mistura, transporte ou lançamento do concreto. Dentre os métodos de END, aplicáveis ao concreto, o método de ensaio da Velocidade de Propagação do Pulso Ultrassônico (VPU) vem sendo utilizado comumente em diversas áreas da Engenharia Civil, devido à facilidade da operação, ao seu baixo custo, à rapidez na execução dos testes e à ausência de danos ao material analisado. Este trabalho visa estudar a influência que determinadas variáveis tecnológicas exercem sobre os resultados obtidos através dos ensaios de VPU. Foram moldados em laboratório dois elementos de concreto, com dimensões próximas a estruturas reais. Um elemento com armadura nas duas faces e outro sem armadura, nos quais foram introduzidos objetos para reproduzir possíveis falhas de concretagem. De modo a facilitar a análise dos dados, os resultados são apresentados por meio de imagens geradas através de programas computacionais e análises estatísticas. Através deste estudo verificou-se que a escolha dos parâmetros de ensaios é fator crucial para que se tenha uma interpretação correta dos resultados.Palavras-chave: ensaios não destrutivos, velocidade de propagaçao do pulso ultrassônico, estruturas de concreto armado.

show abstract

Section: Introductionmentioning

confidence: 94%

Analysis of reinforced concrete structures through the ultrasonic pulse velocity: technological parameters involved

Adamatti

Lorenzi

Chies

et al. 2017

Rev. IBRACON Estrut. Mater.

View full text Add to dashboard Cite

show abstract

“…The results of the rebound hammer enable to obtain the imperfections on the surface of the concrete (Lorenzi et al, 2014). He added that the result of rebound hammed reflects to hardness of the surface and less potential to detect the internal defects.…”

Section: Rebound Hammer Testmentioning

confidence: 99%

Influence of Wastepaper Sludge Ash (WPSA) on Ultimate Flexural and Non-Destructive Test (NDT) Results of Ultra High Performance Concrete

Sukri¹,

Kudus²,

Jamadin³

et al. 2022

JSCET

View full text Add to dashboard Cite

Nowadays, cement is widely used in the construction industry for the development of this modern era, which causes bad effects on the environment and human health. Besides, waste products such as wastepaper are the other problems facing the environment and land field disposal. In this research, the use of WPSA is not only used as an alternative way to save the environment but also to improve concrete strength in UHPC. WPSA has been added in the range of 5% to 15% of the total weight of cement in UHPC. The prisms with a size of 100 mm x 100 mm x 500 mm with a different percentage of WPSA were tested for flexural tests and non-destructive tests (NDT), which measure ultrasonic pulse velocity and rebound. These tests were carried out to evaluate the flexural strength and mechanical properties of WPSA based on NDT testing. The results show the addition of 5%, 10%, and 15% of WPSA, which are 1.96 N/mm2, 2.26 N/mm2, and 2.11 N/mm2 respectively, in UHPC, which causes the lower flexural strength result. At the same time, the UPV test result shows the concrete is of doubtful quality for all specimens. The average pulse velocity of control UHPC is 2397.38 m/s, which is the highest. This result was also followed by a rebound number that represents low compressive strength as compared to the result of the compressive test. The highest average compressive strength is 38 MPa, which represents the control UHPC. At 5% WPSA addition, the compressive strength started to decrease. The addition of 10% and 15% of WPSA causes a more significant drop in compressive strength.

show abstract

“…Common defects in concrete structures include corrosion, cracking and spalling, deterioration, de-bonding, surface and subsurface deformations, delamination, and material performance impairment [ 56 , 57 , 58 , 62 ]. The classification scheme proposed by Rehman et al [ 63 ] (see Figure 5 ) suggests that ultrasonic sensors and IR thermography for structural health monitoring are suitable techniques for assessing various types of defects, including spalling, corrosion, cracking, and delamination. In contrast, acoustic emissions are only appropriate for delamination, cracking and spalling, and deterioration.…”

Section: Sensors For Health Monitoring Of Agricultural Structuresmentioning

confidence: 99%

Sensors for Structural Health Monitoring of Agricultural Structures

Maraveas

Bartzanas

2021

Sensors

View full text Add to dashboard Cite

The health diagnosis of agricultural structures is critical to detecting damages such as cracks in concrete, corrosion, spalling, and delamination. Agricultural structures are susceptible to environmental degradation due to frequent exposure to water, organic effluent, farm chemicals, structural loading, and unloading. Various sensors have been employed for accurate and real-time monitoring of agricultural building structures, including electrochemical, ultrasonic, fiber-optic, piezoelectric, wireless, fiber Bragg grating sensors, and self-sensing concrete. The cost–benefits of each type of sensor and utility in a farm environment are explored in the review. Current literature suggests that the functionality of sensors has improved with progress in technology. Notable improvements made with the progress in technology include better accuracy of the measurements, reduction of signal-to-noise ratio, and transmission speed, and the deployment of machine learning, deep learning, and artificial intelligence in smart IoT-based agriculture. Key challenges include inconsistent installation of sensors in farm structures, technical constraints, and lack of support infrastructure, awareness, and preference for traditional inspection methods.

show abstract

Investigation of the Potential for Evaluation of Concrete Flaws Using Nondestructive Testing Methods

Cited by 13 publications

References 4 publications

Analysis of reinforced concrete structures through the ultrasonic pulse velocity: technological parameters involved

Analysis of reinforced concrete structures through the ultrasonic pulse velocity: technological parameters involved

Influence of Wastepaper Sludge Ash (WPSA) on Ultimate Flexural and Non-Destructive Test (NDT) Results of Ultra High Performance Concrete

Sensors for Structural Health Monitoring of Agricultural Structures

Contact Info

Product

Resources

About