Repair, Protection and Waterproofing of Concrete Structures

Perkins, Philip H.

doi:10.4324/9780203475720

Cited by 24 publications

(19 citation statements)

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“…There are many approaches available for retrofitting and strengthening damaged concrete structural elements, in which crack repairing is always considered a cost-effective one, provided that right repairing materials are selected and properly applied [2,10,11]. Crack repairing is essential for a deteriorated concrete structure not only because it can improve its function and performance, restore its structural integrity, but guarantee its durability by preventing ingress of moisture, oxygen, chloride, and carbon dioxide etc.…”

Section: Introductionmentioning

confidence: 99%

Developing a polymer-based crack repairing material using interpenetrate polymer network (IPN) technology

Zhu

Liu

et al. 2015

Construction and Building Materials

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Section: Introductionmentioning

confidence: 99%

Developing a polymer-based crack repairing material using interpenetrate polymer network (IPN) technology

Zhu

Liu

et al. 2015

Construction and Building Materials

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“…Resultant high-temperature gradient causes deleterious tensile strain gradient on concrete surface ( Figure 4). Nevertheless, damage of concrete due to thermal shock occurs only in specific situations (Perkins, 1997). Additionally, former studies showed that freezing and thawing a salt solution on the concrete surface is more detrimental than thawing the frozen pure water layer on the surface with application salt solution onto it (Sellevold & Farstad, 1991;Verbeck & Klieger, 1957).…”

Section: E Yenermentioning

confidence: 96%

A new frost salt scaling mechanism for concrete pavements based on brine rejection from ice layer adhered to concrete surface

Yener¹

2014

Road Materials and Pavement Design

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In cold regions, highways, airfields or sidewalks are exposed to de-icing agents to thaw the ice layer on pavement surface. In this situation, a progressive surface damage that pulls off flaky chips from concrete pavement takes place. This damage is named as frost salt scaling. To produce scaling-resistant concrete and prevent the damage in the field, the deterioration mechanism should be understood well. For this aim, a number of mechanisms have been hypothesised in literature. However, there is no unique one which can be used to explain all observations from laboratory tests and field applications. In this study, a novel hypothesis that is built on earlier findings in literature is introduced. According to the proposed mechanism, the pressure applied by forced brine from outer strong ice layer, which adhered to surface, causes scaling in the strongly ice adhered regions. The published events that are unexplainable by a unique former mechanisms proposed in literature related to the frost scaling are rationalised based on the proposed mechanism.

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“…Thus, many researchers have tried to provide an estimation of the concrete compressive strength through the pulse velocity measurements, but over a wide range of maturity, the relationship between them is highly nonlinear [11,12]. Except the velocity V , the attenuation a of the ultrasonic stress wave (in dB/m) is theoretically possible to be deduced from the decrease of the amplitude 1 A and 2 A of the received signal for two different paths with lengths 1 L and 2 L respectively. This is a measure of the intrinsic damping of the monitored material and it is empirically related with its strength [39].…”

Section: Working Principlementioning

confidence: 99%

Monitoring of concrete structures using the ultrasonic pulse velocity method

Karaiskos

Deraemaeker

Aggelis

et al. 2015

Smart Mater. Struct.

131

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Concrete is the material most produced by humanity. Its popularity is mainly based on the low production cost and the great structural design flexibility. The operational and the ambient loadings including the environmental effects have a great impact in the performance and overall cost of concrete structures. Thus, the quality control, the structural assessment, the maintenance and the reliable prolongation of the operational service life of the existing concrete structures are turned into a major issue. In the recent years, non-destructive testing (NDT) is becoming increasingly essential for reliable and affordable quality control and integrity assessment not only during the construction of new concrete structures, but also for the existing ones. Choosing the right inspection technique is always followed by a compromise between its performance and cost. In the present paper, the ultrasonic pulse velocity (UPV) method, which is the most well-known and widely-accepted ultrasonic concrete NDT method, is thoroughly reviewed and compared with other well-established NDT approaches. Their principles, inherent limitations and reliability are reviewed. In addition, while the majority of the current UPV techniques are based on the use of piezoelectric transducers held on the surface of the concrete, special attention is paid to the very promising technique using low-cost and aggregate-size piezoelectric transducers embedded in the material. That technique has been evaluated based on a series of parameters, such as the ease of use, cost, reliability and performance.

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Repair, Protection and Waterproofing of Concrete Structures

Cited by 24 publications

References 0 publications

Developing a polymer-based crack repairing material using interpenetrate polymer network (IPN) technology

Developing a polymer-based crack repairing material using interpenetrate polymer network (IPN) technology

A new frost salt scaling mechanism for concrete pavements based on brine rejection from ice layer adhered to concrete surface

Monitoring of concrete structures using the ultrasonic pulse velocity method

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