Marija Jelcic Rukavina

University of Zagreb Faculty of Civil Engineering · Department for Materials

21. do 24. travnja 2024 · Cavtat Hrvatski savez građevinskih inženjera 513 9. Sabor hrvatskih graditelja Sažetak U ovome radu provedena je numerička analiza prijenosa topline s optimiranjem toplinskih mosto-va za LSF (engl. Light Steel Frame) šuplje izolirane zidove kako bi se smanjili ukupni gubici topline kondukcijom. Analizirani su učinci izolac...

This paper presents the details of three fire tests conducted on light-steel-framed (LSF), load-bearing wall systems, which consist of polyurethane insulation injected into the cavities of the steel frame between two or three layers of gypsum fibreboard. To investigate the thermal and structural performance limits under standard fire conditions, ob...

The main objective of this paper is to analyse, by means of experimental tests, the effects of different configurations of gypsum fiberboards on the fire behavior of light steel frame (LSF) composite panels. For this purpose, a standardized fire resistance test was performed on two specimens consisting of a steel frame, polyurethane (PUR) foam as a...

Light steel frame (LSF) building systems are a fast, reliable and economical construction system for residential and non‐residential buildings. Since the thermal conductivity of steel significantly limits the effectiveness of such wall systems for use in modern energy‐efficient buildings, adequate thermal insulation is essential. For this reason, n...

In order to maintain the quality of construction for nearly zero energy buildings and to reduce the pressure on construction workers with the addition of the need for faster and simpler structures, the use of cavity-insulated LSF (lightweight steel frame) panels is increasing. Requirements for performance quality, quality of life, and low energy co...

With the increasing awareness of global warming, largely due to the emission of large amounts of CO2, some attempts have been made to develop strategies to help combat the growing trend of global warming. To reduce the harmful effects of concrete production, efforts are being made to reduce the amount of cement used by replacing the cement with min...

Light steel frame (LSF) building systems offer high structural resilience, lower costs due to fast prefabrication, and high ability to recycle and reuse. The main goal of this paper was to provide state-of-the-art main components for such systems with the intention to be implemented for use in nearly-zero energy buildings (NZEBs). A brief historica...

In the original publication [...]

This paper presents an experimental investigation of the compressive behavior of high-strength self-compacting concrete exposed to temperatures up to 600 °C. Ten different concrete compositions were tested, in which part of the cement (by weight) was replaced by three different mineral additives (5–15% metakaolin, 20–40% fly ash and 5–15% limestone...

In general, 20–25% of the original fibre weight is considered waste in the production of high-quality textiles for the construction sector. A market analysis has shown that in the Republic of Croatia alone, up to 327 tonnes of this waste is produced annually, which is enough to reinforce 50 to 150 thousand m3 of cementitious composites. This prelim...

This paper presents the results of an experimental study aimed at determining the influence of wood fly ash (WFA) from three Croatian power plants on the properties of concrete. First, the chemical and physical properties of WFA’s were determined. It was found that these properties are highly influenced by combustion technology, the type and parts...

This paper presents the results of an experimental study conducted to evaluate the effect of recycled tyre polymer fibres (RTPF) on the mechanical and durability properties of concrete after high temperature exposure. RTPF were used as an alternative to the commonly used polypropylene fibres (PPF) in concrete. Therefore, five different concrete mix...

Self-compacting concrete requires a special composition with an increased proportion of fine particles and larger volumes of paste compared to traditional vibrated concrete. Larger volumes of paste increase autogenous deformation, which can cause microcracking of concrete. The aim of this paper is to research the possibility of using recycled polym...

Study compares properties of wet-sprayed concrete made with PP and RTPF fibers. RTPF as received from factory can serve as substitute for multifilament PP fibers. RTPF do not impair the pumpability of sprayed concrete. Higher amounts of RTPF lowers deformations caused by autogenous shrinkage. Addition of RTPF improves freeze-thaw resistance. a b s...

This paper presents an experimental study of recycled tire polymer fibers (RTPF) used as a replacement for polypropylene fibers, evaluating the contribution of the cleaning procedure and defines the benefits for RTPF application in concrete. The density, air content, workability, heat of hydration, early age deformations, development of compressive...

Due to high energy dependency, the European Union´s policy is turned to promotion of the use of renewable energy throughout directives with culmination with the agreement at the 21st Conference of the Parties (COP21) in Paris. Within, European Union (EU) has put forward the share of renewable energy increasing to at least a 27 % until 2030. Among t...

Usporedba ponašanja različitih ETICS sustava u uvjetima požara ispitivanjem u stvarnoj veličini U ovom radu prikazano je ispitivanje fasadnih sustava u stvarnoj veličini. Ispitivanje je provedeno s ciljem usporedbe ponašanja ETICS sustava s različitim toplinsko izolacijskim slojem (goriva izolacija, goriva izolacija s protupožarnom barijerom od neg...

This study evaluates how elevated temperatures can affect the properties of concrete prepared with steel slag as a coarse aggregate. Four slag-based concrete mixtures were studied, using different types of cement pastes prepared with portland cement, fly ash as a 20% replacement of portland cement, and polypropylene fibers at 0.1% by volume, respec...

This paper presents the effects of long-term exposure of concrete structures to marine environment using as an example concrete blocks of a pier exposed to seawater for more than three decades. The blocks were tested to determine their mechanical characteristics (compressive strength), durability (gas permeability and capillary absorption), homogen...

Different types of fibres are often used in concrete to prevent microcracking due to shrinkage, and polypropylene fibres are among the most often used ones. If not prevented, microcracks can lead to the development of larger cracks as drying shrinkage occurs, enabling penetration of aggressive substances from the environment and reducing durability...

The interest in the use of aluminium as a structural material has increased greatly in recent years. However, behaviour of aluminium structures exposed to fire is still relatively unexplored. Aluminium structures have low fire resistance because of the low melting temperature of the alloy, but aluminium is reflective and has a more than a twice low...

This paper presents an experimental research on the performance of high-strength self-compacting concrete (SCC) with different mineral additives after exposure to high temperatures of up to 600°C. For this purpose, four SCC mixtures were studied: one reference and three mixtures where the Portland cement was replaced with mineral additive (fly ash,...

This paper addresses fresh and hardening properties of self compacting concretes (SCC) made with dolomite filler and pozzolanic materials, fly ash and matekaolin as cement replacement in different amounts. For this study, seven mixtures were prepared with a constant water-to-powder ratio and powder content. Fresh SCC properties were assessed by mea...

This paper aims to investigate the possibility of utilizing steel slags locally produced in Croatian plants as a concrete aggregate. Therefore, eight concrete mixtures were prepared with coarse slag fractions and different binders whose hardened state properties (compressive strength, static modulus of elasticity, volume changes and corrosion susce...

Early age cracking can influence the long-term performance of concrete structures to a certain extent. Compared to conventional types, high performance concretes with higher amount of cement paste as it is self-compacting concrete, has a greater potential for occurrence of early age cracking due to autogenous deformations. The main objective of the...

Major challenges of traditional linear concrete industry are utilisation of large amount of non-renewable resources and significant air emissions during production, utilisation and demolition of concrete structures. At the same time, concrete industry has a high potential for a positive shift towards more sustainable production and lower ecological...

In this paper electric arc furnace (EAF) steel slag as by-products from the steel production industry is considered as an aggregate which could improve post-fire properties of concrete due to the fact that it is the material that is made at the temperatures of up to 1650 °C. For this purpose five high-strength concrete (HSC) mixtures were prepared:...

An overview is given of research conducted by the authors and their associates over the past several years, with the focus on meeting sustainability criteria in the field of reinforced concrete, regarded as material that is used for making more durable reinforced-concrete structures. The foundations of sustainability lie in three basic assumptions,...

Tests conducted in accordance with Croatian standards in order to define possibility of using domestic slag as concrete aggregate, are described. The aggregate is specified according to classification given in HRN EN 12620/AC:2006, and categories obtained for individual aggregate properties are compared with requirements contained in Croatian regul...

An overview is given of research conducted by the authors and their associates over the past several years, with the focus on meeting sustainability criteria in the field of reinforced concrete, regarded as material that is used for making more durable reinforced-concrete structures. The foundations of sustainability lie in three basic assumptions,...