Half a century of reinforced concrete electric poles maintenance: inspection, field-testing, and performance assessment

Kliukas, Romualdas; Daniūnas, Alfonsas; Gribniak, Viktor; Lukoševičienė, Ona; Vanagas, Egidijus; Patapavičius, Andrius

doi:10.1080/15732479.2017.1402068

Cited by 25 publications

(16 citation statements)

References 38 publications

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“…Speaking about spun concrete products (including the supporting poles of overhead power lines), it should be mentioned that their production technology is specific, which results in the different concrete structure and texture and a smaller value of the residual water-cement ratio (W/C) residual than those in regular vibrated concrete [ 24 ]. The performed tests have shown the high resistance and reliability of spun concrete structures [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

The Reinforced Spun Concrete Poles under Physical Salt Attack and Temperature: A Case Study of the Effectiveness of Chemical Admixtures

2020

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The present paper focused on the investigation of the effectiveness of using various chemical admixtures and their effect on the strength and deformability of the reinforced spun concrete members—the supporting poles of the overhead power transmission lines—under the unfavorable long-term combined action of the aggressive salt-saturated groundwater and the temperature changes. According to the long-term experimental program, 96 prismatic spun concrete specimens were subjected to multi-cycle (25-50-75 cycles) processing under the combined aggressive environmental conditions. It has been found that chemical admixtures which decrease the initial water-cement ratio produce a considerable positive effect on the mechanical properties of spun concrete used in hot and arid climates and exposed to physical salt attack (PSA). Superplasticizers decrease the initial water-cement ratio the most, and, due to a unique concrete compaction method used, they produce the most homogeneous and dense concrete structure. They can be recommended as most effective in increasing the durability of spun concrete used under the above-mentioned aggressive environmental conditions.

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Section: Introductionmentioning

confidence: 99%

The Reinforced Spun Concrete Poles under Physical Salt Attack and Temperature: A Case Study of the Effectiveness of Chemical Admixtures

2020

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“…In Lithuania, the studies of physical and mechanical properties on reinforced spun concrete have been performed since 1959 at the base of the former Vilnius Civil Engineering Institute (now, Vilnius Gediminas Technical University). These studies mostly were focused on experimental and theoretical research on the supporting poles of overhead power lines and communication systems [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Spun concrete has minimal water permeability, which means that long-term use of its products outdoors (e.g., the supports of overhead power lines) has a negligible effect on its strength. The results obtained in testing the state of overhead power line supports, which are more than 30 years old, in Lithuania, demonstrated that spun concrete members are significantly more durable and reliable when compared to the members of vibrated concrete [14]. The benefits of spun prestressed concrete poles of overhead electric power lines in respect of wooden and steel poles are presented in [32].…”

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confidence: 99%

Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

2020

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The current research paper is focused on the experimental investigation of features of chemical admixtures (superplasticizers C-3, ‘Dofen’ and formaldehyde resin ACF-3M) utilizing in reinforced spun concrete structures. For the sake of comparison, the results of studying the effects of chemical admixtures on physical and mechanical properties on vibrated and spun concrete are provided. As a separate part of spun concrete products, the supporting poles of overhead power lines are introduced. The results obtained indicate, that the positive effect of chemical admixtures for spun and vibrated concrete is most pronounced at an early age of concrete. The effective amount of chemical admixtures for spun concrete is 0.15% of cement mass when formaldehyde resin ACF-3M and 1% of cement mass when superplasticizers C-3 and ‘Dofen’ are used. Moreover, the brief review about the reinforced spun concrete members is provided.

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“…The maintenance of concrete structures, especially deteriorated bridges, is time consuming and expensive (Abelson & Flowerdew, 1975; Balogun, Tomor, Lamond, Gouda, & Booth, 2019; Kliukas et al., 2018; Purvis & Berger, 1983). The sudden failure of an in‐service bridge has potentially large social impacts.…”

Section: Introductionmentioning

confidence: 99%

Estimation of internal corrosion degree from observed surface cracking of concrete using mesoscale simulation with Model Predictive Control

Kuntal

Jiradilok

Bolander

et al. 2020

Computer aided Civil Eng

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Corrosion of the steel reinforcing bars in concrete structures is one of the major maintenance problems. Corrosion results in expansive pressure on the surrounding concrete, which causes internal damage that may become visible as surface cracking. Such damage may degrade structural safety and serviceability. Effective maintenance requires the evaluation of residual performance based on estimates of spatially nonuniform levels of corrosion, which are typically obtained through surface measurements only. In this study, the authors have developed a simulation system for estimating the levels of internal corrosion along the reinforcing bar length from surface crack information. This innovative system is produced by integrating the technique of Model Predictive Control (MPC) with Rigid-Body-Spring Models (RBSM) of corrosion-induced cracking at the concrete mesoscale.In this study, MPC controls the simulated surface cracks such that they match the observed cracks by optimizing the internal expansions of springs representing the steel-concrete interface within the RBSM. The applicability of the system is verified using both synthetic crack width data and crack data collected from in-house laboratory testing. In the laboratory testing, corrosion levels were quantified by 3D scanning of the extracted reinforcing bars. The simulation results agree with the corrosion measurements, demonstrating the potential of the MPC-RBSM system for predicting the corrosion distribution along reinforcing bars using surface crack data.

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Half a century of reinforced concrete electric poles maintenance: inspection, field-testing, and performance assessment

Cited by 25 publications

References 38 publications

The Reinforced Spun Concrete Poles under Physical Salt Attack and Temperature: A Case Study of the Effectiveness of Chemical Admixtures

The Reinforced Spun Concrete Poles under Physical Salt Attack and Temperature: A Case Study of the Effectiveness of Chemical Admixtures

Reinforced Spun Concrete Poles—Case Study of Using Chemical Admixtures

Estimation of internal corrosion degree from observed surface cracking of concrete using mesoscale simulation with Model Predictive Control

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