Effect of built-in mineral wool insulations durability on its thermal and mechanical performance

Nagy, Balázs; Simon, Tamás K.; Nemes, Rita

doi:10.1007/s10973-019-08384-5

Cited by 26 publications

(21 citation statements)

References 17 publications

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“…In order to explore the components as well as the structure of the samples with the resins, scanning electron microscopy analysis was performed. Nagy et al [40] highlight that electron microscopy produces significant results for mineral wool insulations. They have highlighted that resin can increase the density and can enhance the thermal and mechanical properties.…”

Section: Surface Morphology and Fiber Distribution Investigations By Scanning Electron Microscopymentioning

confidence: 99%

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

2021

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In the European Union, almost 40% of all energy consumption comes from buildings, while another 20–25% comes from transport. In the European Union, including Hungary, only buildings with almost-zero energy demand could be built after 2020, and the use of renewable energies must be strengthened. The Renewable Directive stipulated that by 2020, the share of renewable energy in buildings must be 25%, and in transport it must be 10%; the use of electric vehicles is vital. There are about four million dwellings in Hungary, of which approximately three million need to be renovated, and only some of these (a few hundred) meet the cost-optimized level of the 2020 directive. The use of insulation materials is very important in the transport sector, too. Insulation materials are also used by aircraft and electric vehicles. To reduce the energy loss from buildings, different insulation materials can be used; investigations of insulation materials are very important. This paper presents a comprehensive research report on insulation materials which could be used for building elements, HVAC (heating, ventilation, and air conditioning appliances) equipment, and vehicles. In this paper, laboratory investigations will be presented along with calculations to better understand the properties and behavior of these materials. For this, firstly structural analysis with scanning electron microscope will be presented. Moreover, the paper will present thermal conductivity and combustion heat measurement results. The sorption and hydrophobic behavior of the materials will be also revealed. Finally, the article will also display differential scanning calorimetry measurements and Raman spectroscopy results of the samples. The research was conducted on four different types of colorized microfiber lightweight wool insulation.

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Section: Surface Morphology and Fiber Distribution Investigations By Scanning Electron Microscopymentioning

confidence: 99%

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

2021

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“…Such data are obtained from laboratory measurements, where it may not be possible to simulate the effects of weathering at the respective intensity. For example, the properties of mineral wool can get worse by up to 40% because of moisture [23]. For both manufacturers and customers, examining the thermal properties of building materials, such as effective thermal conductivity, is particularly important.…”

Section: Selected Properties Of Available Thermal Insulation Materialsmentioning

confidence: 99%

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

2021

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This study deals with small investors’ demands on thermal insulation systems when choosing the most suitable solution for a family house. By 2050, seventy percent of current buildings, including residential buildings, are still expected to be in operation. To reach carbon neutrality, it is necessary to reduce operational energy consumption and thus reduce the related cost of building operations and the cost of the life cycle of buildings. One solution is to adapt envelopes of buildings by proper insulation solutions. To choose an optimal thermal insulation system that will reduce energy consumption of building, it is necessary to consider the environmental cost of insulation materials in addition to the construction cost of the materials. The environmental cost of a material depends on the carbon footprint from the initial origin of the material. This study presents the results of a multi-criteria decision-making analysis, where five different contractors set the evaluation criteria for selection of the optimal thermal insulation system. In their decision-making, they involved the requirements of small investors. The most common requirements were selected: the construction cost, the construction time (represented by the total man-hours), the thermal conductivity coefficient, the diffusion resistance factor, and the reaction to fire. The confidences of the criteria were then determined with the help of the pairwise comparison method. This was followed by multi-criteria decision-making using the method of index coefficients, also known as the method of basic variant. The multi-criteria decision-making included thermal insulation systems based on polystyrene, mineral wool, thermal insulation plaster, and aerogels’ nanotechnology. As a result, it was concluded that, currently, in Slovakia, small investors emphasize the cost of material and the coefficient of thermal conductivity and they do not care as much about the carbon footprint of the material manufacturing, the importance of which is mentioned in this study.

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“…Some recent solutions in this area are based on renewable materials, such as wood fiber, blown and sprayed cellulose, wool, hemp, and straw, among others [2][3][4][5][6][7]. However, the conventional insulation materials mostly employed in the construction sector are mineral wools and polymeric foams [8]. Closed-cell polymeric foams are used often due to their low weight, cost-effectiveness, and reduced thermal conductivities [9,10].…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles Addition in PU Foams: The Dramatic Effect of Trapped-Air on Nucleation

2021

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To determine the effect of nanoclays and trapped air on the formation of rigid polyurethane foams, three different production procedures were used. To study the influence of mixing at atmospheric pressure, two approaches were carried out employing either an electric or a magnetic stirrer. The third approach was executed by mixing under vacuum conditions with magnetic stirring. The samples thus obtained were characterized, and the effect of trapped air into the reactive mixtures was evaluated by analyzing the cellular structures. Different levels of trapped air were achieved when employing each manufacturing method. A correlation between the trapped air and the increase in the nucleation density when nanoclays were added was found: the cell nucleation density increased by 1.54 and 1.25 times under atmospheric conditions with electric and magnetic stirring, respectively. Nevertheless, samples fabricated without the presence of air did not show any nucleating effect despite the nanoclay addition (ratio of 1.09). This result suggests that the inclusion of air into the components is key for improving nucleation and that this effect is more pronounced when the polyol viscosity increases due to nanoclay addition. This is the most important feature determining the nucleating effect and, therefore, the corresponding cell size decreases.

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Effect of built-in mineral wool insulations durability on its thermal and mechanical performance

Cited by 26 publications

References 17 publications

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

The Analysis of Small Investors’ Demands on a Thermal Insulation System for a Family House: A Case Study

Nanoparticles Addition in PU Foams: The Dramatic Effect of Trapped-Air on Nucleation

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