scholarly journals Using seismoacoustic sounding technique for the purpose of structural integrity evaluation of the solid reinforced-concrete foundation for the power transmission line supports

2019 ◽  
Vol 265 ◽  
pp. 05018
Author(s):  
Viktor Shabalin ◽  
Boris Smishljaev ◽  
Aleksandr Zhuravlev ◽  
Jaroslav Sheetz
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
Structural Integrity ◽  
Power Transmission ◽  
Power Transmission Line ◽  
Concrete Foundation ◽  
Integrated Practice ◽  
Geophysical Technique ◽  
Concrete Placement ◽  
Non Destructive

During construction of the monolithic reinforced-concrete foundation, it is not easy to monitor both a continuous haulage and technology of concrete placement. For that matter, some breach of the foundation structural integrity may occur. Currently, there is no unanimous integrated practice of monitoring concrete placement for building oversize solid reinforced-concrete foundations. The surveying results of the solid concrete foundation dimensioned 16m by 16m and from 2 to 3.5m thick are set forth in the article. Such geophysical technique as seismoacoustic sounding has proved effective for concrete placement quality control of monolithic reinforced-concrete foundations by means of a non-destructive method.

Elektrochemische, zerstörungsfreie Prüfmethoden für Zustandsanalysen und Qualitätssicherung bei Instandsetzung von Stahlbetonbauten / Electrochemical non-destructive test methods for the assessment and quality control of restoration measures of reinforced concrete structures

1997 ◽  
Vol 3 (6) ◽  
pp. 581-602
Author(s):  
H. Wojtas
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
State Of The Art ◽  
Concrete Structures ◽  
Test Methods ◽  
Reinforced Concrete Structures ◽  
Potential Mapping ◽  
Concrete Resistivity ◽  
Non Destructive ◽  
Restoration Measures

Abstract In this state of the art report the electrochemical, non destructive techniques for the survey, assessment and the quality control of reinforced concrete structures such as the potential mapping, the measuring of concrete resistivity and the polarisation resistance for on-site applications are described. Along with a short description of each technique especially those aspects are discussed, that are important for on-site applications: possibilities and limits of the technique as well its suitability for use in the different stages of rehabilitation works. The examples from practical on-site applications will be presented in a following report.

Combined Way of Diagnostics of Reinforced Concrete Conical Structures

2018 ◽  
Vol 931 ◽  
pp. 346-351 ◽  
Author(s):  
Elena Yu. Romanenko ◽  
Mikhail A. Trubitsin
Keyword(s):  
Reinforced Concrete ◽  
Power Supply ◽  
Power Transmission ◽  
Operational Reliability ◽  
Power Transmission Line ◽  
Reinforced Concrete Structures ◽  
Repair Work ◽  
Conical Section ◽  
Supply Systems ◽  
Conical Structures

Reinforced concrete conical structures are the basis of safety and operational reliability of railways power supply systems. The article presents optimal methods for diagnostics of reinforced concrete structures, which allow recommending the sequence and amount of repair work aimed at restoring or maintaining the required state of reinforced concrete conical section structures (contact-line supports, power transmission line supports, etc.). A design scheme is proposed for determining the residual bearing capacity of the support in the presence of cracks and corrosion of the reinforcement.

NON-DESTRUCTIVE APPROACH TO THE BOLT JOINTS QUALITY CONTROL

2020 ◽  
pp. 37-42
Author(s):  
N. V. Mikhalevich ◽  
O. S. Plotnikova
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Experimental Research ◽  
Bolted Joints ◽  
Reinforced Concrete Structures ◽  
Structural Elements ◽  
Bolted Connections ◽  
Non Destructive ◽  
Destructive Methods

Bolted connections are often used to connect structural elements in steel, wood and reinforced concrete structures. In structural inspecting, there is often no marking on bolted joints. So, it is necessary to determine the bolt strength to assess the bolt joint bearing capacity. The bolt strength can be determined by destructive and non-destructive methods. The article presents the experimental research to determine the bolt strength using the scratch method and compares the results with the destructive method (bolt breaking).

scholarly journals Quality control of high-performance concrete in high-rise construction during operation

2018 ◽  
Vol 170 ◽  
pp. 01035
Author(s):  
Artem Davidyuk ◽  
Igor Rumyantsev
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Test Methods ◽  
Construction Sector ◽  
High Rise ◽  
Pull Out ◽  
Non Destructive

With onset of the XXI century, the demand for construction of high-rise buildings with the load-bearing framework made of high-performance cast-in-situ concrete has increased many-fold in the construction sector. Specific features of the high-performance concrete of bearing structures in the situation of real operation of high-rise buildings are continuously studied by scientists and specialists all over the world, and regulatory and methodological documents are being complemented and adjusted. High-performance concretes and structures made of them possess some specific features that should be taken into account in quality control. The methods of concrete inspection and concrete strength evaluation described in GOST 18105 “Concretes. Guidelines on Testing and Evaluation of Strength” and GOST 22690 “Concretes. Evaluation of Strength by Mechanic Non-Destructive Test Methods” were written when precast reinforced concrete was predominantly used in the construction sector and were limited to the functions of intra-factory quality control of reinforced concrete products. At present, instruments for non-destructive testing using indirect methods are usually calibrated with the help of local destructions, as a rule, a pull out or rib shear test. The said methods are in fact indirect since they indicate the force of destruction of the surface layer of a structure.

scholarly journals Repair compositions for restoration of operated reinforced concrete structures

2021 ◽  
Vol 273 ◽  
pp. 04017
Author(s):  
Elena Shlyakhova ◽  
Irina Serebryanaya ◽  
Inna Egorochkina ◽  
Andrey Matrosov ◽  
Maxim Odinets ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Transmission Line ◽  
Transmission Lines ◽  
Life Support ◽  
Power Transmission ◽  
Technical Condition ◽  
Power Transmission Line ◽  
Power Transmission Lines ◽  
Operational Characteristics ◽  
Concrete Elements

Power transmission lines (PTL) are strategic objects, the reliability of which depends on the life support of the country. Most of the currently operated power transmission lines were put into operation in the twentieth century, and by now there is a problem of assessing their technical condition, repairing them, if necessary, and maintaining them in a working condition. Defects that appear during the operation of reinforced concrete elements of power transmission lines have different localization and degree of manifestation, but typical is the destruction of the surface layer of concrete with exposure of rebar, more often at the base of the power transmission line. The aim of the work is to select the optimal composition of the repair mixture based on non-shrinking and expanding cements, ensuring reliable adhesion of the repair compounds to the concrete of the structure, which will restore the bearing and operational characteristics in the repaired reinforced concrete elements of the power transmission line at the design level.

scholarly journals Non-destructive methods of concrete quality control as factor in reliability of concrete and reinforced concrete structures in transport facilities

2018 ◽  
Vol 4 (1) ◽  
pp. 058-067
Author(s):  
Yuri A. Belentsov ◽  
Liliya F. Kazanskaya
Keyword(s):  
Quality Control ◽  
Reinforced Concrete ◽  
Concrete Structures ◽  
Construction Materials ◽  
Strength Properties ◽  
Theory And Practice ◽  
Reinforced Concrete Structures ◽  
Control Methods ◽  
Probabilistic Forecasting ◽  
Non Destructive

Aim: The development of theory and practice of construction science leads to a need to enhance the basics of design, construction and operation of concrete and reinforced concrete structures. Despite significant progress, there is risk of collapse of different structures at various stages of their lifecycle. Current state of construction industry leads to a need to increase the quality and reliability of buildings and structures under construction. Methods: The authors have used methods of probabilistic forecasting in this work Results: The development of methods of construction materials control, particularly concrete and reinforced concrete, leads to a gradual implementation of non-destructive control methods. To assess the change of confidence and reliability coefficients of designed structures, the authors have substantiated the transition to probabilistic rationing of strength properties of concrete and reinforced concrete structures using classes. Also, the authors suggest implementation of non-destructive control methods. However, non-destructive control methods have a number of drawbacks, the key among these being the decrease of confidence coefficient while preparing a calibration curve, which drastically affects the results of quality control. It is possible to solve the problem by creating a set of control tests including both destructive and non-destructive quality control methods. This will provide systems for collecting testing information of high accuracy.

Stabilization of a Power Transmission Line Oscillations

2002 ◽  
Vol 29 (3-4) ◽  
pp. 9
Author(s):  
M. I. Kazakevitch ◽  
Ye. V. Horokhov ◽  
M. S. Khorol'sky ◽  
S. V. Turbin
Keyword(s):  
Transmission Line ◽  
Power Transmission ◽  
Power Transmission Line
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