scholarly journals DEFINITION OF EFFICIENCY OF POLYMETHYLPHENYLSІLOXANE-BASED FIRE PROTECTIVE COATINGS FOR STEEL BUILDING STRUCTURES

Fire Safety ◽  
2018 ◽  
pp. 55-62
Author(s):  
O. Yu. Pazen ◽  
S. Ya. Vovk ◽  
O. I. Bashynskyi ◽  
M. Z. Peleshko
Keyword(s):  
Fire Resistance ◽  
Current Problem ◽  
Protective Coatings ◽  
Fire Retardant ◽  
Steel Structures ◽  
Building Structures ◽  
Literary Sources ◽  
Steel Building ◽  
Definition Of ◽  
Protective Coatings For Steel

The article deals with the current problem of determining the fire resistance of protected steel elements of building structures. Based on the analysis of literary sources, the main methods for increasing the fire resistance of steel structures are considered, as well as the use of fire retardant coatings based on polymetallophenylsiloxane. Analytical studies were conducted to determine the time of fire protection of the coating, compared to unprotected structures. The results show that the limit of fire resistance of protected steel constructions is increased 2-4 times, depending on the thickness of the application.

Fire Protection of Steel and Reinforced Concrete Structures of Industrial Buildings and Structures

2021 ◽  
pp. 50-56
Author(s):  
V.I. Golovanov ◽  
◽  
A.V. Pekhotikov ◽  
V.V. Pavlov ◽  
◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Fire Protection ◽  
Temperature Regime ◽  
Fire Retardant ◽  
Steel Structures ◽  
Reinforced Concrete Structures ◽  
Building Structures ◽  
Industrial Buildings ◽  
Temperature Regimes

Variants of progressive solutions for the use of efficient fire protection means for steel and reinforced concrete structures of the industrial buildings and structures are considered for the purpose of increasing the actual fire resistance and ensuring the requirements of fire safety norms. Distinctive features of the temperature regimes in the initial phase of a real fire from a standard fire were established when assessing the fire resistance of building structures. It is proposed to use such standardized temperature regimes of fire for assessing the fire resistance of building structures, as standard — in the industrial buildings; temperature regime of hydrocarbons combustion — for oil and gas, petrochemical enterprises, offshore stationary platforms; tunnel temperature regime — in the road and railway tunnels. Considering the operating conditions and performance of work on fire protection, the degree of aggressiveness of the environment, the structural and methodological scheme was developed for selecting passive fire protection for steel structures. Recommendations are given on limiting the use of intumescent paints for load-bearing steel structures involved in the overall stability of buildings, with the required fire resistance limit of no more than 30 minutes. To calculate the temperature over the section of the structure during its heating, the dependences of the change in the coefficients of thermal conductivity and heat capacity of fire-retardant linings under fire were obtained. Experimental studies were conducted related to the fire resistance of reinforced concrete floor slabs and slabs with an external reinforcement system based on the carbon composite material with various types of fire-retardant materials. The issue of protecting the lining blocks of road and railway tunnels from brittle (explosive) destruction of concrete in a fire is considered. It is experimentally confirmed that the addition of polypropylene fibers to the concrete mixture replaces the use of fire protection for the tunnels enclosing structures.

Evaluation of fire-retardant effectiveness of coatings for steel structures

2020 ◽  
pp. 43-54
Author(s):  
Владимир Ильич Голованов ◽  
Андрей Владимирович Пехотиков ◽  
Владимир Валерьевич Павлов
Keyword(s):  
Thermal Conductivity ◽  
Fire Resistance ◽  
Fire Protection ◽  
Oil And Gas ◽  
Fire Retardant ◽  
Steel Structures ◽  
Building Structures ◽  
Load Bearing ◽  
Passive Fire Protection ◽  
Actual Fire

Представлены результаты анализа экспериментальной и аналитической оценки огнезащитной эффективности покрытий для стальных конструкций. Обобщены данные многолетних исследований по определению зависимостей от температуры таких теплофизических характеристик, как теплопроводность и теплоемкость. Разработана структурно-методологическая схема выбора огнезащитных покрытий для стальных конструкций в целях обеспечения нормативных требований по огнестойкости. Проведены экспериментальные исследования по определению огнезащитной эффективности терморасширяющихся покрытий на эпоксидной основе при воздействии температурного режима горения углеводородов. Рассмотрен вопрос о гармонизации методики экспериментальной оценки огнезащитной эффективности средств огнезащиты для стальных конструкций с действующими европейскими нормами. Установлены критерии выбора пассивной огнезащиты, зависящие от области применения способов огнезащиты. Steel structures have high strength, relative lightness and durability, but when exposed to high temperatures in a fire, they deform, lose stability and load-bearing capacity. The collapse of load-bearing steel structures can occur in 10-15 minutes after the fire start. The actual fire resistance limit of structures can be increased by using the active and passive fire protection systems. The use of the active system for increasing the actual fire resistance limit is not provided in the regulatory documents. Passive fire protection is a complex of technical solutions including the use of non-flammable materials and bulging compounds. It is also an integral part of the building structure that ensures the required fire resistance limit. Assessment of fire resistance of building structures of residential, public, warehouse and industrial buildings is carried out taking into account the temperature regime (cellulose) of a standard fire. At oil and gas, petrochemical enterprises as well as at oil production platforms fires can occur at combustion of various hydrocarbon fuels which are characterized by a rapid temperature increase to 1100 °C. In this case, in accordance with GOST R EN 1363-2-2014, the temperature regime of hydrocarbon combustion is used to assess the fire resistance of building structures. The fire-retardant effectiveness of fire protection means for steel structures is determined by the heating time of the standard I-shaped column without applying a static load on the sample to the average “critical” temperature of the steel of 500 °C. Materials used for fire protection of steel structures must have a good thermal insulation ability, which is estimated by the coefficient of thermal conductivity. When heated to high temperatures, the thermal conductivity coefficient of fire-resistant materials varies depending on their composition and temperature. Based on the analysis of research to determine the fire-retardant effectiveness of fire protection means for steel structures there was developed a structural and methodological scheme that allows to make a choice of fire protection. Currently, as a fire protection there are widely used intumescent paints and thermo-expandable coatings. Taking into account the lack of knowledge of the influence of long-term operation and a large number of other technological factors on the fire-retardant effectiveness of coatings of steel structures covered with intumescent paints, it would be right to limit the use of such type of fire protection for load-bearing structures contributing to the overall sustainability of buildings with a required fire resistance of R 30. For fire protection of steel structures of oil and gas facilities located in the open air, in severe climatic conditions and exposed to aggressive environments there is successfully used a thermo-expandable two-component epoxy-based coating. The analysis of experimental data showed that the use of epoxy-based coatings is suitable for metal structures in the open air. In closed rooms the epoxy intumescent coating should not be used because at high temperature in a fire it ignites with toxic combustion products release.

scholarly journals FIRE RESISTANCE OF BUILDING STRUCTURES OF FLAMMABLE AND COMBUSTIBLE LIQUIDS STORES

Fire Safety ◽  
2019 ◽  
pp. 5-9
Author(s):  
O. I. Bashynskiy ◽  
M. Z. Peleshko ◽  
T. G. Berezhanskiy
Keyword(s):  
Fire Resistance ◽  
Fire Safety ◽  
Theoretical Calculations ◽  
Fire Hazard ◽  
Building Structures ◽  
Safety Measures ◽  
Normative Documents ◽  
Size Number ◽  
Literary Sources ◽  
Combustible Liquids

The article is dedicated to the fire resistance limit of building structures of the objects for the storage of flammable and combustible liquids. Today, oil stores are very important elements of the oil supply system in Ukraine. The analysis of literary sources has shown that fires in oil stores cause extra fire hazard of surrounding objects. Increasing of their scales requires further improvement of fire safety measures during planning and using of oil stores. Fires in such buildings are tricky and large; they cause great harm and often lead to the death of people; their liquidation is very difficult. Theoretical calculations shown that the collapse of structures of the packaged oil stores and, as a result, significant material losses and the threat to people's life and health, were resulted from the incorrect selection of building structures and the discrepancy between the fire resistance of these structures and the applicable norms and requirements for such buildings. Fire Safety, №34, 2019 9 Fire resistance limit of the metal double-T pillar made of steel ВСт3пс4 (profile size number 30) was calculated in the article. Such constructions are used in oil stores. The obtained fire resistance limit of a metal double-T pillar is about 16 minutes (R 16). According to the normative documents for buildings of this type (the degree of fire resistance of the building – III), it should be 120 minutes (R 120). Even if the calculation method has an error due to the choice of another steel grade, objectively none of the double-T profiles from the assortment list would provide proper fire resistance limit.

Определение требуемой толщины вспучивающегося огнезащитного покрытия на стальных конструкциях для заданных пределов огнестойкости

2020 ◽  
Author(s):  
Yury Shebeko ◽  
Aleksey Shebeko ◽  
Andrey Zuban
Keyword(s):  
Fire Resistance ◽  
Confidence Level ◽  
Fire Retardant ◽  
Steel Structure ◽  
Steel Structures ◽  
Mean Square ◽  
Mean Square Deviation ◽  
R Value ◽  
The Given

Проанализирована взаимосвязь разброса значений пределов огнестойкости стальных конструкций со вспучивающимися огнезащитными покрытиями и соответствующего этому разбросу интервала толщины огнезащитного покрытия. Предложена методика, на основании которой может быть осуществлен выбор необходимой толщины огнезащитного покрытия в зависимости от заданных значений дисперсии предела огнестойкости и приведенной толщины конструкции при заданной доверительной вероятности.An analysis of a relationship between fire resistance limits scatter for steel structures coated with intumescent fire retardant coating and an appropriate interval of thicknesses of the coating was carried out. A methodology for the determination of this relationship was proposed. This methodology was tested on a practical example. A steel structure with a reduced thickness of 6 mm was considered. A typical dependence of the required thickness of the structure was taken into account. A ratio of a mean square deviation of the fire resistance limit to this limit was accepted to be equal 0.1. Using these values an appropriated interval of the thicknesses of the intumescent fire retardant coating was determined. This interval can be calculated for any given confidence level. Boundaries of this interval can be not symmetric in relation to the value of the normative thickness of the fire retardant coating. The proposed methodology can be used for the determination of the required thicknesses of the intumescent fire retardant coatings on steel structures for the given r value, reduced thickness of the structure and the confidence level.

Design Study of Steel Structure Fire-Retardant Coatings under High Temperature (Fire) Conditions

2012 ◽  
Vol 594-597 ◽  
pp. 849-859
Author(s):  
Man Li Ou ◽  
Wei Jun Cao ◽  
Long Min Jiang ◽  
Hui Cao
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Fire Resistance ◽  
Fire Protection ◽  
Structural Damage ◽  
Fire Retardant ◽  
Steel Structure ◽  
Steel Structures ◽  
Strength And Stiffness ◽  
Fire Conditions

As the result of great changes occurring to mechanical properties under high temperature (fire) conditions, steel structures will soon lose the strength and stiffness and lead to structural damage. Through analysis of the steel structure fire resistance design methods under the conditions of high temperature (fire), this article explores the most used fire protection methods in steel structures—brushing or painting fire-resistant coatings, studies the fire-resistance theory of steel structure under fire conditions; in addition, the author proposes the reasonable thickness of the steel structure fire retardant coating of fire-resistant design through design examples.

Effect of Epoxy Binder on Fire Protection and Bonding Strength of Intumescent Fire Protective Coatings for Steel

2010 ◽  
Vol 168-170 ◽  
pp. 1228-1232 ◽  
Author(s):  
Ming Chian Yew ◽  
Nor Hafizah Ramli Sulong
Keyword(s):  
Thermal Stability ◽  
Fire Protection ◽  
Bonding Strength ◽  
Protective Coatings ◽  
Steel Structures ◽  
Bunsen Burner ◽  
Foam Structure ◽  
Char Layer ◽  
Epoxy Emulsion ◽  
Protective Coatings For Steel

This study focuses on the effect of epoxy emulsion, a binder for producing water-borne intumescent fire protective coating for steel structures. The influence of binder on the fire resistive performance, char formation, thermal stability and bonding strength of the coatings were investigated in detail by using Bunsen burner test, thermogravimetry analysis (TGA), field emission scanning electron microscopy (FESEM) and Instron microtester. It was found that the fire protection performance and foam structure of coating sample D2 was significantly improved by adding 10wt% of epoxy resin which produced the greatest thickness of char layer. In addition, TGA results showed that the residue weight of coating D2 was higher than coating sample D3 with 15wt% of epoxy. This indicated that sample D2 has better anti-oxidation and thermal stability. The results of Instron microtester indicated that the bonding strength of the coatings was improved with the increase of epoxy content.

Analysis of Factors Influencing the Performance of Q460 Steel

2014 ◽  
Vol 599-601 ◽  
pp. 7-11
Author(s):  
Zhu Ling Yan
Keyword(s):  
Mechanical Properties ◽  
Engineering Application ◽  
Steel Structures ◽  
Building Structures ◽  
Practical Application ◽  
Widespread Application ◽  
Factors Influencing ◽  
Steel Building ◽  
Practical Engineering ◽  
Main Factors

With the development of technology, steel structures have been gaining increasingly widespread application, and the scope of research of steel types is also becoming increasingly broad. In addition to the four common steels used in construction, various mechanical properties and practical application of Q460 steel have also been studied at home and abroad at present. This paper introduces the research status of Q460 steel, describes its mechanical properties and the requirements for steels used in steel building structures, and analyzes the main factors influencing the properties of Q460 steel, providing some reference for practical engineering application of Q460 steel.

Research of Thermal Stability and Fire-Resistance Properties of the Composite Material “Water Glass-Graphite Microparticles”

2017 ◽  
Vol 744 ◽  
pp. 27-31
Author(s):  
Anton Ustinov ◽  
Eugene Pitukhin ◽  
Alexander Pitukhin
Keyword(s):  
Thermal Stability ◽  
Composite Material ◽  
Fire Resistance ◽  
Water Glass ◽  
Protective Coatings ◽  
Fire Hazard ◽  
Quantitative Phase Analysis ◽  
Building Structures ◽  
Fire Resistance Test ◽  
Temperature Exposure

The properties of “water glass – graphite microparticles” composite material (CM) have been researched and qualitative and quantitative phase analysis of the CM structure has been done. Experimental samples of the CM with filler particles (graphite) and a few micrometers in size have been studied with X–ray diffraction and electron microscopy. Fire–resistance test of the composition has been conducted. Fire–resistance limit for the test samples of composite material is determined by the loss of its insulating ability (I). Fire–resistance limit I15 equal to 15 minutes has been obtained in accordance with the requirements of regulatory documents. It is shown that the research material is characterized by thermal stability and maintains its composition and structure under high temperature exposure. Composite material with the obtained characteristics can be used as protective coatings for building structures to increase fire resistance and reduce fire hazard.

Detection of Dangerous Defects and Damages of Steel Building Structures by Active Thermography

2021 ◽  
Vol 1038 ◽  
pp. 417-423
Author(s):  
Sergiy Kolesnichenko ◽  
Andrii Popadenko ◽  
Yurii Selyutin
Keyword(s):  
Steel Structures ◽  
Qualitative Assessment ◽  
Building Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Theoretical Substantiation ◽  
Active Thermography ◽  
Steel Building ◽  
Non Destructive

The article presents the results of a study of use thermographic non-destructive testing to search for cracks in steel structures. Theoretical substantiation of thermal non-destructive method of control for detection of cracks in steel structures. A practical study proving the possibility of using thermal non-destructive testing to detect cracks in steel structures is described. The problems that arise during the thermal non-destructive method of control and possible ways to solve them. The authors conclude that the method of thermographic control can be used during the inspection of steel structures for qualitative assessment of cracks.

EVALUATION OF FIRE RESISTANCE OF FIRE PROTECTED STEEL STRUCTURES

2021 ◽  
pp. 149-158
Author(s):  
Andrii Kovalov ◽  
◽  
Yurii Otrosh ◽  
Vitalii Tomenko ◽  
Andrii Kondratiev ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Experimental Method ◽  
Fire Resistance ◽  
Fire Retardant ◽  
Steel Structures ◽  
Resistant Steel ◽  
Standard Temperature ◽  
Steel Columns ◽  
Steel Column ◽  
Fire Resistant Steel

Purpose. Evaluation of fire resistance of fire-resistant steel structures using the developed calculation and experimental method. Methods. Finite difference method, landfill fire test method, mathematical and computer modeling of non-stationary heat exchange processes, determination of thermophysical characteristics of fire-retardant coatings based on solving direct and inverse thermal conductivity problems. Results. Geometric, physical, computer models have been developed, with the help of which the fire resistance of fire-resistant steel structures has been evaluated by the calculation-experimental method. The adequacy of the developed method for assessing the fire resistance of fire-resistant steel structures in assessing the fire resistance of fire-resistant I-beam steel column has been checked. The analysis of tests on fire resistance of fire-resistant steel columns exposed to fire at the standard temperature of the fire without the load applied to them has been carried out. A computer model of the “steel column – reactive flame retardant coating” system has been built for numerical simulation of non-stationary heating of such a system. The fire resistance of fire-resistant steel columns of I-beam section without load applied to them has been evaluated using the calculation-experimental method. Verification of results of experimental research with results of numerical modeling has been carried out. Scientific novelty. The convergence of the results of experimental data on the duration of fire exposure at the standard temperature of the fire to reach the critical temperature of steel with the results of numerical simulations has been determined. Based on the comparison of the experimental results and numerical modeling, the adequacy of the developed model to the real processes that occur when heating fire-retardant steel columns without applying a load under fire conditions at a standard fire temperature has been confirmed. The efficiency of the proposed calculation and experimental method for assessing the fire resistance of fire-resistant steel structures has been confirmed. Practical significance. It consists in the implementation of the results on objects of different purposes in assessing the fire resistance of fire-resistant steel structures by evaluating the effectiveness of fire-retardant coatings of steel building structures.

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