Cover zone properties influencing acoustic emission due to corrosion

Ing, Matthew J.; Austin, Simon A.; Lyons, Richard

doi:10.1016/j.cemconres.2004.05.006

Cited by 29 publications

(20 citation statements)

References 15 publications

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“…AE technique has been applied for detection and identification of concrete cracking due to corrosion of reinforcing steel [23][24][25][26]. Detected AE was associated with several events such as:…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission detection of microcrack formation and development in cementitious wasteforms with immobilised Al

Spasova

Ojovan

2006

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Acoustic emission detection of microcrack formation and development in cementitious wasteforms with immobilised Al

Spasova

Ojovan

2006

Journal of Hazardous Materials

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“…That underlies the diagnos-tics of the whole structure (with measurements covering the whole of the structure or its selected part) operating under actual service load [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Monitoring of active destructive processes as a diagnostic tool for the structure technical state evaluation

Goszczyńska¹,

Świt²,

Trąmpczyński³

2013

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. In this paper, a global monitoring system based on the measurement of acoustic emission (AE) due to active deterioration processes is presented. This allows us to examine the entire volume of an element and to locate and identify the type and the dynamics of the deterioration processes under service conditions. The resulting data are used to determine and locate the damage processes that are dangerous in construction made of pre-stress concrete, steel and fiber glass and to assess the general condition of the structure.

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“…In this respect AE has significant advantages compared with other NDT methods because the AE technique is the only one able to reliably detect the very early stages of the corrosion process, before significant damage to the concrete has occurred and furthermore it can indicate the level of damage occurring to the concrete. [8,9,10] 2 Experimental Procedure…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Analysis of Prestressed Concrete Structures

Elfergani

Pullin

Holford

2011

J. Phys.: Conf. Ser.

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Abstract. Corrosion is a substantial problem in numerous structures and in particular corrosion is very serious in reinforced and prestressed concrete and must, in certain applications, be given special consideration because failure may result in loss of life and high financial cost. Furthermore corrosion cannot only be considered a long term problem with many studies reporting failure of bridges and concrete pipes due to corrosion within a short period after they were constructed. The concrete pipes which transport water are examples of structures that have suffered from corrosion; for example, the pipes of The Great Man-Made River Project of Libya. Five pipe failures due to corrosion have occurred since their installation. The main reason for the damage is corrosion of prestressed wires in the pipes due to the attack of chloride ions from the surrounding soil. Detection of the corrosion in initial stages has been very important to avoid other failures and the interruption of water flow. Even though most non-destructive methods which are used in the project are able to detect wire breaks, they cannot detect the presence of corrosion. Hence in areas where no excavation has been completed, areas of serious damage can go undetected. Therefore, the major problem which faces engineers is to find the best way to detect the corrosion and prevent the pipes from deteriorating. This paper reports on the use of the Acoustic Emission (AE) technique to detect the early stages of corrosion prior to deterioration of concrete structures. IntroductionSeveral structures e.g. bridges, buildings, concrete pipes, strong tanks, dams, nuclear reactor protective shells, railway sleepers, piles and pressure vessels are made of prestressed concrete in which prestressing steel wires are put into a permanent state of tension to compensate for the inadequate tensile strength of the concrete. Tensile cracking in the concrete is minimised by ensuring that the concrete is in compression under normal working loads by prestressing the steel reinforcement. Generally prestressed steel is between four to five times stronger than mild steel. The main advantages of prestressed concrete structural materials are that they are stronger, lighter and "crack free" [1] and hence these materials offer cost benefits over other materials. Corrosion is a big problem in numerous structures. The cost due to corrosion is estimated in billions of dollars every year. Department of Transport in the UK evaluated that, the cost of recondition of concrete structures damaged by corrosion problems is £755 million a year [2]. The problem of corrosion in this type of structure must be given special consideration because failure may result in the worst scenario a loss of life but at a minimum a loss in finance. Most studies indicate the main reason of failure of bridges and concrete pipes is due to corrosion during the short period after they were constructed. The concrete provides the ideal environment to protect the steel wires which are

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Cover zone properties influencing acoustic emission due to corrosion

Cited by 29 publications

References 15 publications

Acoustic emission detection of microcrack formation and development in cementitious wasteforms with immobilised Al

Acoustic emission detection of microcrack formation and development in cementitious wasteforms with immobilised Al

Monitoring of active destructive processes as a diagnostic tool for the structure technical state evaluation

Acoustic Emission Analysis of Prestressed Concrete Structures

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