Éva Lublóy

Éva Lublóy
Budapest University of Technology and Economics · Department of Construction Materials and Engineering Geology

PhD, habil

About

106
Publications
30,533
Reads
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463
Citations
Additional affiliations
September 2001 - present
Budapest University of Technology and Economics
Position
  • Professor (Assistant)
September 2001 - present
Budapest University of Technology and Economics
Position
  • Professor (Assistant)

Publications

Publications (106)
Article
Full-text available
Excessive exploitation and increased demand for conventional sand made an unbalanced ecosystem; a suitable and sustainable alternative has to be adopted to preserve the ecosystem. The present investigation examines the performance of Sodium Silicate Waste (SSW), an industrial by-product of 100% sand replacement in geopolymer concrete (GPC). The inv...
Article
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The rapid advancement in computer vision has facilitated new means for the automatic assessment of structural damages. This study aims to develop a deep learning-based autonomous damage detection framework for concrete structures under fire conditions. A hybrid deep learning network comprising of Convolution Neural Network (CNN) and Long Short Term...
Article
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Self-Compacting Concrete (SCC) is a green construction material widely used in the construction industry. While normal weight concrete has notable performance under fire conditions, the open literature continues to lack works examining the structural fire performance of SCC elements. Intending to bridge this knowledge gap, the present study aims to...
Article
Nuclear buildings are exposed to hazardous radiation and high temperature during their operation and in the case of fire. Heavyweight concrete is used in constructing nuclear buildings for the advantages of strength, durability, heat resistance, and shielding against radiation. The physical, mechanical and microstructure properties of the heavyweig...
Article
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Concrete is a heterogeneous material that consists of cement, aggregates, and water as basic constituents. Several cementitious materials and additives are added with different volumetric ratios to improve the strength and durability requirements of concrete. Consequently, performance of concrete when exposed to elevated temperature is greatly affe...
Article
Full-text available
Concrete is a heterogeneous material that consists of cement, aggregates, and water as basic constituents. Several cementitious materials and additives are added with different volumetric ratios to improve the strength and durability requirements of concrete. Consequently, performance of concrete when exposed to elevated temperature is greatly affe...
Article
Full-text available
Structural concrete is a widely used building material due to its versatile characteristics including higher compressive strength and longevity. However, when exposed to fire, concrete experiences faster degradation in its mechanical properties and is also susceptible to spalling. To overcome this problem, the possibility of lightweight plaster app...
Article
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Nowadays application of radiation shielding structures grows over the world. Nuclear buildings represent one of the most complicated radiation shielding structures; that is why a particular type of concrete is required to withstand different conditions during their lifespan. Unique properties such as the behaviour under elevated temperatures, radia...
Article
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Fire protection of steel structures is playing an increasingly important role nowadays. The fire protection of steel structures can be solved with intumescent paint, mortar, fire protection coating and concrete coating. Several fire tests have been performed to check these solutions. Combined structures, which consist of insulation material and fir...
Article
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Concrete and reinforcement steel are essential building materials widely used in composite construction due to their advantages, such as strength, durability and ease of availability. Fire is one of the critical hazards that causes severe damage to the structure and leads to progressive collapse. Due to the intensity of fire exposure, the concrete...
Article
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Our paper analysed the residual fracture mechanical properties (fracture energy, KIC critical stress intensity factor) of normal and lightweight concrete subjected to elevated temperature. Sand and quartz aggregate were used for normal concretes (NC), and two types of expanded clay aggregates (ECA) with different densities were used for lightweight...
Article
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This paper presents an experimental and numerical analysis considering the effect of standard fire conditions on the post-fire strength of hot rolled hollow steel sections, where the influence of passive protection, cooling conditions and micro structural changes were also analysed with precision. Square, rectangular and circular shaped specimens w...
Article
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The residual compressive strength of eight lightweight concrete mixtures containing three commercial grading (Liapor HD 5 N, Liapor HD 7 N, and Liapor 8F) of coarse lightweight aggregate (LWA) were determined after to expose at high temperatures. Eight mixes were produced, two by normal weight aggregate and the rest by different types of LWA. The p...
Article
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Purpose: Fire can severely affect concrete structures and with knowledge of the properties of materials, the damage can be assessed. Aggregate, cement matrix and their interaction are the most important components that affect concrete behaviour at high temperatures. The effect of incorporating recycled concrete aggregate or cementitious materials,...
Article
Purpose Fire protection regulations are difficult to comply with in the case of wooden structures because of the fact that wood is a combustible material. The fire protection of wood can be solved with coatings or by the application of flame retardants. Design/methodology/approach The standard of MSZ EN 1995‐1‐2 currently does not allow the consid...
Article
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Absztrakt A fa, mint építőanyag lényegileg különbözik a legtöbb szokványos építőanyagtól, hiszen egy élő organizmus feldolgozásának eredménye. A felhasználási területet nagyban befolyásolja a faanyag minősége és a kialakult hibák. A roncsolásmentes vizsgálatok előtérbe kerültek ezen a területen, hiszen számos fahiba az élő, növekvő fán alakul ki, í...
Article
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This paper presents experimental versus theoretical comparison of carbon fiber reinforced polymer (CFRP) confined rubberized concrete (a new structural material). A total of sixty six rubberized concrete cylinders were tested in axial compression. The specimens were cast using 0 to 50% rubber replacement. Twenty seven cylinders were then confined w...
Article
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Interfacial shear stress transfer may occur in structural elements across concrete or between concrete and steel. The fundamental contributing parameters which improve the shear capacities are aggregate grading, compressive strength of concrete, type and area of the interfacial zone, and interfacial reinforcement pattern. During the event of a fire...
Article
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High strength concrete (HSC) production is worldwide increased and gradually replacing the normal strength concrete (NSC). The cement matrix of concrete is the essential part that governs the behavior and strength of concrete. Several researchers have focused on the performance of hardened cement paste (HCP) at ambient temperature such as using dif...
Article
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The mechanical properties of concrete based mainly on flexural and compressive bearing capacity. Generally, researchers have an interest in the evaluation of compression property through the importance of the flexural performance of the material in the constructions, namely the significance of each mechanical property based upon the position of the...
Article
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Fibers that are used to enhance the residual flexural and tensile strength of fiber reinforced concrete (FRC) are reinforcing materials possessing good mechanical characteristics and properties. The effect of fiber on the flexural strength of FRC at elevated temperatures is limited and hence the present paper studies the influence of fibers (basalt...
Article
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The present experimental study evaluates the residual mechanical properties and the microstructure evolution of high-strength concrete (HSC) after the exposure to elevated temperatures. Metakaolin (MK) is used as supplementary material that is expectable to produce fire-resistant HSC and environmentally friendly. Three major groups of testing have...
Article
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Purpose The fire safety of structures is an existing and important design aspect, which is assured by strict regulations. As a means to adhere to the strict requirements, fire protection has become a core problem. It is particularly difficult to comply with these regulations in the case of timber, which is a combustible material. These problems cou...
Article
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The effects of elevated temperatures on the properties of high-strength cement paste (HSCP) based on metakaolin (MK), silica fume (SF), and fly ash (FA) were studied in the current experimental research. The resistance of HSCP against elevated temperatures was evaluated as well. The new method is expressed by the total area under each curve of stre...
Article
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In case of construction investments, the cost estimation was always important. The reason for this is that after the planning, the most important issue is the cost of the investment. There are many different estimation methods. These estimates may vary in depth, depending on the task and the plan. The question is what happens if we wanted to predic...
Article
Health monitoring of concrete including, detecting defects such as cracking, spalling on fire affected concrete structures plays a vital role in the maintenance of reinforced cement concrete structures. However, this process mostly uses human inspection and relies on subjective knowledge of the inspectors. To overcome this limitation, a deep learni...
Article
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In this study the behaviour of double sheared doweled connections was analysed, regarding the temporal changes in fire performance. Based on literature of special features of fire performance of timber and timber connections, a timber-steel-timber connection was used with dowels and bolts in the analysis. A natural fire model was created with the O...
Article
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The quality of the natural stone aggregates change with each shipment and it greatly influences the fire-performance of the concrete. For this reason, it would be advantageous if there would be a classification system for aggregates for fire or fire-related temperatures. The classification of the aggregate itself instead of the concrete could be fa...
Article
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This paper presents a wide experimental study, in which it evaluates the performance of high-strength paste exposed to elevated temperatures up to 900 °C. Several factors have been investigated at the age of 90 days, i.e. metakaolin (MK) dosages, water to binder ratio (w/b) as well as elevated temperatures. Results proved that MK improves the relat...
Article
Full-text available
Purpose During the building designing, it is very important to deal with the fire resistance of the structures. The designed materials for escape routes should be selected to ensure the usability of the structures until the time of escape. Planning affects the glass structures similarly, so these can also be partition walls and load bearing structu...
Article
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Purpose The aim of the research was to investigate the effect of concrete strength on the fire resistance of structures. At first, it may seem contradictory that higher concrete strengths can decrease the fire resistance of building structures. However, if the strength of the concrete exceeds a maximum value, the risk of spalling (the detachment of...
Article
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The most flame retardants and non-combustible non-woven fabrics are made of oxidized and carbon fibres due to their strong thermal stability. The burning of non-woven fabrics consists of complex combustion mechanisms: their surface, micro and macrostructures together define their combustion features. By microstructure, we mean oxidized polyacrylicn...
Article
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A 3D nyomtatás a megjelenésétől fogva az érdeklődés középpontjában van. A technológia fejlődésén és sikeres alkalmazásain keresztül életünk részévé vált a legkülönbözőbb területeken. A folyamatok összetettsége révén a betonnyomtatás van talán a többi területhez képest (műanyagnyomtatás és fémnyomtatás) leginkább lemaradva. Szándékunk ezért részlete...
Article
The construction of radiation shielding buildings still developed. Application of ionizing radiations became necessary for different reasons, like electricity generation, industry, medical (therapy treatment), agriculture, and scientific research. Different countries all over the world moving toward energy saving, besides growing the demand for usi...
Article
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In the case of charcoal speeds, the defects of the wood and the effect of the metal fixing elements are not taken into account. The aim of our research was to analyze and investigate the effect of wood defects and fasteners on fire resistance. During the experiments we investigated the effect of the defects in the wood and the effect of the metal f...
Article
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Incorporating waste and recycled materials in concrete has not just a sustainable benefit, but also gives a higher resistance to special circumstances that face concrete structures, such as fire, which causes serious damages to concrete. The present study experimentally investigated the impact of incorporating recycled coarse aggregate (RCA) and tw...
Article
In our research, stones were tested after exposing them to temperature load to get information about the changes in their properties and about the limits of applicability. The tested stones are types that are widely used as tiles in Hungary (granite, marble, travertine, labradorite). Beside flexural strength, among our laboratory tests uniaxial com...
Article
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Electric wiring is part of the fire protection systems; therefore, it must work reliably for a given period of time. Cable is in the first place among the cause of fire. Fires are always triggered by unsafe and nonstandard conditions, so we can approach safety if we know the properties of cables we want to use. We recommend adding standard ratings...
Article
Full-text available
The influence of time on the mechanical behavior of concrete after exposure to elevated temperatures has been studied. Twenty-one self-compacting high-performance concrete mixtures with different incorporation amounts of coarse recycled concrete aggregate (RCA) and three unprocessed waste powder materials have been tested at age of 270 days for res...
Article
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A megszilárdult betonnal, betontermékkel, vasbeton és feszített vasbeton szerkezeti elemmel érintkező lágyvizek és agresszív vizek, folyadékok, gázok, gőzök, permetek, erjedő anyagok a cement kötőanyagú betonok oldódásos korrózióját okozhatják. Cikksorozatunknak e folyóirat 2017. évi 3. számában megjelent 1. részében (Balázs et al., 2017) a vizek é...
Article
Nowadays X-ray computed tomography (CT) imaging is being applied in the field of structural engineering. Scanning a concrete specimen by using X-ray tomography provides an insight into the inner structure without the need to destroy the specimen. As an example, the internal structure of cement-based materials is of high importance for understanding...
Article
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Improper construction on of chimneys can lead to dwelling-house fires, smoke poisoning or death [1]. Due to the constantly increasing demands, new and more advanced chimney linings are being produced and used. In the case of reinforced concrete and brick chimneys, modern chimney technology applies linings. It is well known that the stainless steel...
Chapter
Full-text available
Composition and microstructure of hardened cement paste have important influences on the properties of concrete exposed to high temperatures. An extensive experimental study was carried out to analyse the post-heating characteristics of concretes subjected to temperatures up to 800 °C. Major parameters of our study were the content of supplementary...
Article
During the development of the carbon fibres and oxidized fibres, the aim was to get a material with extraordinary mechanical properties. Nowadays, it becomes more and more important to make it also fire resistant. To achieve the fire resistance of the raw material PAN, a multistage technology process is needed in which its microstructure and flamma...
Article
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Recent fire cases indicated again the importance of fire research. Fast development of construction technology requires new materials. Initiation and development of fire are strongly influenced by the choice of construction materials. In addition to their mechanical properties, their behaviour in elevated temperature is also of high importance. Res...
Article
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The increasing numbers of used tyres constitute a serious threat to the natural environment. The progress made in recent years in the management of polymer wastes has meant that used tyres are starting to be perceived as a potential source of valuable raw materials. The objective of this research was to study the burning characteristics of various...
Chapter
Full-text available
An extensive experimental study has been carried out to analyse the post-heating characteristics of concrete subjected to high temperatures up to 800 °C. Major parameters of our study were the type and amount of supplementary cementitious materials (slag, fly ash, trass, silica fume, metakaolin) in cements and the level of maximum temperature (50,...
Article
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Numerous studies have verified that increased concrete strength reduces its resistance to fire, leads to a higher degree of strength reduction and higher chances of spalling of concrete surfaces.The risks of spalling of concrete surfaces can be reduced by adding synthetic polypropylene fibres. Numerous experiments have shown that the risk of spalli...
Article
Nowadays application of fibre reinforced concretes (FRC) becomes more and more widespread, due to the favourable experiences with their behaviour. As a consequence, an increasing number of studies are published on different aspects of FRC. Several scientific papers indicate the importance of homogeneous distribution of fibres. Our study includes an...
Article
Fire can cause damage in structures. The level of damage depends on several factors, such as maximal temperature, duration of fire, constituents of the concrete and so on. It is necessary to design fire-resistant buildings and deal with possible reconstruction after fire. For the reconstruction, it is important to determine the level of damage and...
Article
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Our study was directed to the analysis of the influence of various types of cements on the behaviour of concrete at high temperatures. In our experiments binary blended and ordinary Portland cements were involved: two Portland cements with different clinker compositions and Portland cements containing pozzolanic additives as replacement of clinkers...
Article
Bond between concrete and reinforcement is investigated in this project after a thermal cycle at high temperature to measure bond residual properties. Six mixes were prepared with either quartzitic gravel or expanded-clay aggregates, and two types of fibers were adopted as well. Cubes were cast to measure the residual compressive strength of the va...
Article
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Az utóbbi évtizedekben számos épületkatasztrófa igazolta, hogy a tűzteherre való méretezés kérdései továbbra is aktuálisak. A különböző hőmérsékleti tartományokban a betonban lejátszódó legfontosabb fizikai és kémiai folyamatok jelentősen befolyásolják a beton magas hőmérséklet hatására kialakuló anyagtulajdonságait. A beton tűzterhelés hatására be...
Article
Full-text available
Our study was directed to improve the residual flexural strength and the heat-resistant properties of concrete exposed to high temperatures using different fiber cocktail loadings including steel, polymer or cellulose fibers. At first the morphology and the thermal properties of the fibers and the fiber/cement composites were investigated by SEM an...
Conference Paper
Full-text available
Composition and microstructure of hardened cement paste have important influences on the properties of concrete exposed to high temperatures. An extensive experimental study was carried out to analyse the post-heating characteristics of concretes subjected to temperatures up to 800 °C. Major parameters of our study were the content of supplementary...
Conference Paper
Different fibers induce different improvements in concrete properties. Fiber cocktails may contribute to provide improvements in different phases of behavior and for different effects (loads or high temperatures). First group of our experimental study included flexural tests in CMOD control with the mix of either two types of steel fibers (short pl...
Article
Full-text available
Concrete is a composite material that mainly consists of mineral aggregates bound by the matrix of hardened cement paste. Composition and microstructure of hardened cement paste have important influences on the properties of concrete exposed to high temperatures. An extensive experimental study was carried out to analyse the post-heating characteri...
Article
Full-text available
p>Deterioration of material characteristics and structural performance highly depends on constituents and temperature history. Material composition can also highly influence structural behaviour of elements. Thickness of web can be critical for high temperatures. The same situation is for interjoist elements (concrete or brick) between precast roof...
Article
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Durability and functionality of hot mix asphalts (HMA) depend on air voids and their characteristics. The air void content of asphalt core samples could be determined by direct and indirect methods. The direct methods are destructive since they determine the air void content by decomposing the mix into its individual components. They are usually ac...