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Article | 28-August-2018

THE SIMULATION OF CORROSION DEGRADATION OF CONCRETE SPECIMEN IN STATIONARY HEAT AND MOISTURE CONDITIONS

This paper is focused on the problem of forecasting damage in reinforced concrete specimens as the consequence of chloride corrosion. The performed numerical calculations included time necessary for filling empty pore space and tightening corrosion products in the interfacial transition zone (ITZ) . In those calculations we assumed the formation of distortional strains in the ITZ layer caused by mass increase of corrosion products dependent on corrosion current intensity.

Faustyn RECHA, Tomasz JAŚNIOK, Tomasz KRYKOWSKI

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 4, 107–113

Research Article | 08-February-2019

ANALYSIS OF CONCRETE CORROSION OF MANHOLE LOCATED NEAR SOURCE OF ODOROUS EMISSION

Abstract The problem of corrosion of sanitary sewer concrete concerns the elements located just behind the expansion well. Evolving odorogenic substances and bioaerosols spread in the sewage system, cause in adverse conditions both chemical and biological corrosion of concrete. The paper presents the results of tests of samples taken from the top concrete circle and from a corroded cast iron hatch of 7 years old manhole located below the expansion well. Well elements were subjected to a strong

Bożena GIL, Barbara SŁOMKA-SŁUPIK, Katarzyna KOWALSKA, Karol JASIŃSKI

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 4, 93–104

Article | 28-August-2018

APPLICATION OF POTENTIOSTATIC MEASUREMENTS ACCORDING TO PN-EN 480-14 IN ASSESSMENT OF THE EFFICIENCY OF REINFORCEMENT PROTECTION AGAINST CORROSION BY CONCRETE WITH ADDITION OF FLY ASHES

Replacing part of the cement in the concrete with fly ash - products of solid fuel burning, requires testing, including the degree of the reinforcement protection against corrosion provided by concrete. The paper presents a comparison of the results of the tests of the effectiveness of corrosion protection of reinforced concrete with the addition of calcareous fly ash. Tests were conducted by two electrochemical methods. Results obtained by potentiostatic measurement on reinforcement inserts

Katarzyna DOMAGAŁA, Andrzej ŚLIWKA

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 109–115

research-article | 30-November-2019

LiDAR derived terrain wetness indices to infer soil moisture above underground pipelines

Many major cities such as Sydney have extensive networks of water supply pipelines, including major trunk lines that are ageing and increasingly prone to failure. Many of these pipes are made of cast iron. This material is traditional and has been shown to have excellent long-term durability, with many pipes surviving well past 100 years. Others, however, fail much earlier, and often this is through corrosion of the external surfaces of pipes. Such corrosion usually leads to weakening of pipe

David Bretreger, In-Young Yeo, Robert Melchers

International Journal on Smart Sensing and Intelligent Systems, Volume 13 , ISSUE 1, 1–7

Article | 28-August-2018

THAUMASITE NON-SULPHATE ATTACK AT AMBIENT TEMPERATURE AND PRESSURE

One of the products of concrete sulphate corrosion, besides gypsum and ettringite, is thaumasite. The thaumasite is a very dangerous, non binding crystalline phase, which is forming at the expense of C-S-H phase. There was a conviction that the conditions required for the formation of thaumasite in concrete are: source of calcium silicate, sulfate ions, carbonate ions and a very wet, cold (below 15°C) environment. The corrosion of concrete caused by the external source of sulphate ions during

Barbara SŁOMKA-SŁUPIK, Adam ZYBURA

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 3, 73–80

Article | 03-November-2017

UHF RFID METAL TAG APPLYING TO LICENSE PLATE USING METAL SHIELDING AND WATERTIGHT METHODS

This paper describes a design for RFID (Radio Frequency Identification) tag using license plate attached the vehicle bumper in 900 MHz band. The implemented metal tag for a license plate is applied metal shielding method, watertight method of RFID tag, and metal corrosion protection method using silk screen technique. Moreover, its range of the fabricated tag antenna that the license plate and the vehicle bumper were fixed by volt and nut was observed 8.2m. This measured readable range showed

Gi-Hyun Hwang, Kyoung-Hwan Cha, Sachin Bhardwaj, Dae-Seok Lee

International Journal on Smart Sensing and Intelligent Systems, Volume 2 , ISSUE 4, 549–563

Article | 28-August-2018

SULFATE RESISTANT CONCRETE WITH ALUMINOSILICATE ADDITIVES

improve fresh concrete properties, density and corrosion resistance of concrete. The chemical reasons of such effect were explained by the means of x-ray diffraction, differential thermogravimetry and scanning electron microscopy. This development should be widely used in several projects in Ukraine, where sulphate-resistant concrete is needed.

Artem PRYYMACHENKO, Leonid SHEINICH

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 4, 101–106

research-article | 21-July-2020

APPROACH TO ASSESSING THE CONSEQUENCES OF EMERGENCIES IN SEWER TUNNELS

networks clearly shows that approximately 80–90% of accidents are caused by structural deterioration due to biogenic corrosion. Chemical reactions occurring in the free space of a sewer network form an aggressive environment with respect to its structures. The dynamics of occurence of emergencies at sewer facilities in Eastern Europe shows the following. Over the last 5 years, the number of emergencies in the wastewater disposal networks, which were laid in the 80–90s of the last century, is almost 5

Olha STARKOVA, Alevtyna ALEINIKOVA, Dmitro BONDARENKO

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 2, 65–73

Article | 30-July-2021

A comparative evaluation of ion release from different commercially-available orthodontic mini-implants – an in-vitro study

Background: Titanium alloy mini-implants have become popular in recent times and have been extensively used and studied. Although corrosion resistance of orthodontic materials has always been of concern, this property has been the least explored. The present study aimed to assess the composition, surface characterisation and corrosion resistance of five commercially available mini-implants by assaying ion release in artificial saliva. Methods: Ten mini-implants each from five companies were

Venkateswaran Ananthanarayanan, Sridevi Padmanabhan, Arun B. Chitharanjan

Australasian Orthodontic Journal, Volume 32 , ISSUE 2, 165–174

Article | 01-September-2012

AN APPROPRIATE PROCEDURE FOR DETECTION OF JOURNAL-BEARING FAULT USING POWER SPECTRAL DENSITY, K-NEAREST NEIGHBOR AND SUPPORT VECTOR MACHINE

) corrosion and (iii) excessive wear. The features of the PSD values of vibration signals were extracted using statistical and vibration parameters. The extracted features were used as inputs to the KNN and SVM for three-class identification. The roles of PSD technique and the KNN and SVM classifiers were investigated. Results showed that the accuracy rate of fault diagnosis was 100%. Also, the results demonstrated that the combined PSD-SVM model had the potential for fault diagnosis of engine journal

A. Moosavian, H. Ahmadi, A. Tabatabaeefar, B. Sakhaei

International Journal on Smart Sensing and Intelligent Systems, Volume 5 , ISSUE 3, 685–700

Article | 16-December-2013

SYSTEM IDENTIFICATION MODELLING AND IMC BASED PID CONTROL OF IMPRESSED CURRENT CATHODIC PROTECTION SYSTEMS

Impressed Current Cathodic Protection (ICCP) system is the most practical method of cathodic protection systems. This system is widely used to prevent the external corrosion of carbon steel structures; especially those are used in underground oil and gas pipelines. In this paper, the theoretical background, principles and concepts of ICCP systems have been discussed. An effective laboratory scale for ICCP systems was built according to specific concepts has been clarified. Consequently,the

EzzEldin Balla, MohdFua’ad Rahmat

International Journal on Smart Sensing and Intelligent Systems, Volume 6 , ISSUE 5, 2055–2074

Article | 24-March-2018

REINFORCEMENT OF COMPOSITE PIPELINES FOR MULTIPURPOSE TRANSPORTATION

The problem of monolithic behavior of a metal pipe and fiberglass safety cage has been considered in the article. The prestressed case does not only decrease the deformability of a pipe on-load but it also protects metal from corrosion. The ability to withstand the arising stresses has been investigated for both strip fiberglass reinforcement and the whole construction. It has been shown that the deformability of fiberglass depends on the kind of binder. The maximum strength value has been

Liudmyla TRYKOZ, Svetlana KAMCHATNAYA, Oksana PUSTOVOITOVA, Armen ATYNIAN

Transport Problems, Volume 13 , ISSUE 1, 69–79

research-article | 30-November-2018

TECHNICAL CONDITIONS OF THE UNIQUE STRUCTURE OF INVERTED SIPHON – HISTORY & PRESENT

flowing tree trunks hitting them during floods. The uncovered rebars underwent corrosion in this spots (Fig. 7). Interestingly, the transverse expansion joints of the individual pipes showed no leaks from above (Fig. 8), which proves that the Gliwice Canal bed insulation was perfectly performed and is still effective (according to [13], the canal bottom section above the siphon was sealed with a loam layer, while the structure itself was insulated with bituminous materials; according to [15], full

Jacek HULIMKA, Marta KAŁUŻA

Architecture, Civil Engineering, Environment, Volume 12 , ISSUE 3, 93–104

Article | 28-August-2018

STRUCTURAL BEHAVIOR OF NORMAL AND HIGH-STRENGTH CONCRETE WALLS REINFORCED WITH GLASS FIBER-REINFORCED POLYMER BARS UNDER ECCENTRIC LOAD

The solution of using glass fiber reinforced polymer (GFRP) bars, as reinforcement in concrete structures to overcome the problems created by steel corrosion, is now widely accepted because of both its non-corrosive nature and good results shown by large investigation efforts. In this paper twenty tests had been conducted on reinforced concrete wall specimens of (800 mm height x 450 mm width x 50 or 70 mm thickness effective dimensions). Four specimens were reinforced with steel bars to be

Yaarub Gatia ABTAN, Hassan Falah HASSAN

Architecture, Civil Engineering, Environment, Volume 10 , ISSUE 2, 55–63

Research Article | 22-May-2019

MICROBIOLOGICAL CONTAMINATIONS OF UNDERGROUND GAS STORAGE FACILITIES AND NATURAL GAS PIPELINES

the quality of stored gas or disruption of its transmission. The paper presents a variety of microbiomes of the underground storage facilities and pipelines, showing that not only the sulfate-reducing bacteria are able to grow and develop in these extreme environments. Microorganisms producing CH4 may change the composition of the gas, and the produced H2S and CO2 are not only gas pollutants, but also generate corrosion of transmission networks. At the same time, the presence of bacteria and

Agnieszka Staniszewska, Alin Kunicka-Styczyńska, Krzysztof Ziemiński

Postępy Mikrobiologii - Advancements of Microbiology, Volume 56 , ISSUE 4, 381–388

research-article | 30-November-2019

OVERVIEW OF SELECTED NATURAL GAS DRYING METHODS

pipelines [7]. In addition, it contributes to the phenomenon of condensation, which leads to the formation of so-called corks and erosion, increasing the volume and decreasing the calorific value of gas. In addition, liquid water accelerates the corrosion process and makes it difficult to measure the flow rate, especially when the gas contains carbon dioxide and/or hydrogen sulphide. For the above reasons, it is necessary to dehumidify the gas before transportation or processing [8, 9]. The paper

Natalia GENEROWICZ

Architecture, Civil Engineering, Environment, Volume 13 , ISSUE 3, 73–83

Article | 24-June-2021

MATERIALS USED IN THE COMBAT AVIATION CONSTRUCTION

greater heat-resistance and anti-corrosion properties, as well as high wear resistance in addition to the aforementioned hardness, which increases by as much as 15% for the AlSi9Cu4 alloy compared with the alloy after standard heat treatment. Such an increase in the values of the mechanical properties makes it possible to use the investigated alloy in applications including, e.g., recyclable thermally exposed surfaces, such as pistons in internal combustion engines, which enables further decrease in

Jarosław KONIECZNY, Krzysztof LABISZ

Transport Problems, Volume 16 , ISSUE 2, 5–18

Article | 20-July-2021

Galvanic coupling and mechanical properties of low Ni orthodontic brackets with representative types of orthodontic wires

) demonstrated intermediate HM values. The ORT (wing) (101 ± 6 GPa) displayed the highest EIT while NiTi wire (24 ± 5) showed the lowest. The latter had the highest elastic index (59 ± 5%) with MIN (base)(15 ± 3) possessing the lowest. The potential difference for all bracket wire combinations was found below the threshold for the initiation of galvanic corrosion (200 mV) apart from MIN coupled with NiTi wire in the NaF solution. Conclusions: The mechanical properties of Ni-free

Géraldine Kummer, Georgios Polychronis, Spiros Zinelis, Theodore Eliades

Australasian Orthodontic Journal, Volume 35 , ISSUE 1, 53–60

research-article | 30-November-2017

NON-METALLIC REINFORCEMENTS WITH DIFFERENT MODULI OF ELASTICITY AND SURFACES FOR CONCRETE STRUCTURES

1. INTRODUCTION Steel reinforced concrete (RC) is one of the most widely used structural materials in construction. Nevertheless, it is well known that, under certain environmental conditions the corrosion of steel reinforcement can lead to the deterioration or even to the collapse of structural RC elements, requesting expensive repairing and strengthening. This detrimental property of the steel reinforcement directed the interest to alternative reinforcing materials [1–7]. Using FRP material

Sandor SOLYOM, Matteo DI BENEDETTI, Anna SZIJÁRTÓ, György L. BALÁZS

Architecture, Civil Engineering, Environment, Volume 11 , ISSUE 2, 79–88

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