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The amount of steel chips generated by lathes and CNC machines is 1200 million tons per year, and they are difficult to recycle. The effect of adding steel chips without pre-cleaning (covered with production lubricants and cooling oils) on the properties of concrete was investigated. Steel waste was added as a replacement for fine aggregate in the amounts of 5%, 10% and 15% of the cement weight, which correspond with 1.1%, 2.2% and 3.3% mass of all ingredients and 0.33%, 0.66% and 0.99% volume of concrete mix, respectively. The slump cone, air content, pH value, density, compressive strength, tensile strength, tensile splitting strength, elastic modulus, Poisson’s ratio and thermal parameters were tested. It was observed that with the addition of lathe waste, the density decreased, but mechanical properties increased. With the addition of 5%, 10% and 15% metal chips, compressive strength increased by 13.9%, 20.8% and 36.3% respectively compared to plain concrete; flexural strength by 7.1%, 12.7% and 18.2%; and tensile splitting strength by 4.2%, 33.2% and 38.4%. Moreover, it was determined that with addition of steel chips, thermal diffusivity was reduced and specific heat capacity increased. With the addition of 15% metal chips, thermal diffusivity was 25.2% lower than in the reference sample, while specific heat was 23.0% higher. No effect was observed on thermal conductivity.
Marcin Małek; Marta Kadela; Michał Terpiłowski; Tomasz Szewczyk; Waldemar Łasica; Paweł Muzolf. Effect of Metal Lathe Waste Addition on the Mechanical and Thermal Properties of Concrete. Materials 2021, 14, 2760 .
AMA StyleMarcin Małek, Marta Kadela, Michał Terpiłowski, Tomasz Szewczyk, Waldemar Łasica, Paweł Muzolf. Effect of Metal Lathe Waste Addition on the Mechanical and Thermal Properties of Concrete. Materials. 2021; 14 (11):2760.
Chicago/Turabian StyleMarcin Małek; Marta Kadela; Michał Terpiłowski; Tomasz Szewczyk; Waldemar Łasica; Paweł Muzolf. 2021. "Effect of Metal Lathe Waste Addition on the Mechanical and Thermal Properties of Concrete." Materials 14, no. 11: 2760.
Marta Kadela; Monika Gwóźdź-Lasoń. Economic analysis for technical and executive projects with geosynthetic materials for the protection of linear structures in the mining areas. ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo 2021, 20, 39 -49.
AMA StyleMarta Kadela, Monika Gwóźdź-Lasoń. Economic analysis for technical and executive projects with geosynthetic materials for the protection of linear structures in the mining areas. ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo. 2021; 20 (1):39-49.
Chicago/Turabian StyleMarta Kadela; Monika Gwóźdź-Lasoń. 2021. "Economic analysis for technical and executive projects with geosynthetic materials for the protection of linear structures in the mining areas." ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo 20, no. 1: 39-49.
The variety of approaches to tackle climate change reflects the size of this global problem. No technology will act as a panacea to cure the greenhouse gas emissions problem, but new building materials with byproducts or even wastes have the potential to play a major role in reducing the environmental impacts of the building sector. In this study, three potential solutions of concrete with dispersed reinforcement in the form of recycled fibers (polypropylene, glass and steel) were examined. The aim is to present a detailed analysis of the thermal properties of new building materials in an experimental approach. Concrete mixtures were prepared according to a new, laboratory-calculated recipe containing granite aggregate, a polycarboxylate-based deflocculant, Portland cement (52.5 MPa) and fibers. This experimental work involved three different contents of each fiber (0.5%, 0.75% and 1.0 wt.%), and all tests were carried after the complete curing cycle of concrete (28 days).
Marcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela. Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete. Materials 2021, 14, 1888 .
AMA StyleMarcin Małek, Mateusz Jackowski, Waldemar Łasica, Marta Kadela. Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete. Materials. 2021; 14 (8):1888.
Chicago/Turabian StyleMarcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela. 2021. "Influence of Polypropylene, Glass and Steel Fiber on the Thermal Properties of Concrete." Materials 14, no. 8: 1888.
The progressive increase in the amount of glass waste produced each year in the world made it necessary to start the search for new recycling methods. This work summarizes the experimental results of the study on mortar samples containing dispersed reinforcement in the form of glass fibers, fully made from melted glass waste (bottles). Mortar mixes were prepared according to a new, laboratory-calculated recipe containing glass fibers, granite as aggregate, polycarboxylate-based deflocculant and Portland cement (52.5 MPa). This experimental work involved three different contents (600, 1200, and 1800 g/m3) of recycled glass fibers. After 28 days, the mechanical properties such as compressive, flexural, and split tensile strength were characterized. Furthermore, the modulus of elasticity and Poisson coefficient were determined. The initial and final setting times, porosity, and pH of the blends were measured. Images of optical microscopy (OM) were taken. The addition of glass fibers improves the properties of mortar. The highest values of mechanical properties were obtained for concrete with the addition of 1800 g/m3 of glass fibers (31.5% increase in compressive strength, 29.9% increase in flexural strength, and 97.6% increase in split tensile strength compared to base sample).
Marcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela; Marcin Wachowski. Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study. Materials 2021, 14, 698 .
AMA StyleMarcin Małek, Mateusz Jackowski, Waldemar Łasica, Marta Kadela, Marcin Wachowski. Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study. Materials. 2021; 14 (3):698.
Chicago/Turabian StyleMarcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela; Marcin Wachowski. 2021. "Mechanical and Material Properties of Mortar Reinforced with Glass Fiber: An Experimental Study." Materials 14, no. 3: 698.
In accordance with the principles of sustainable development, environmentally friendly, low-emission, and energy-intensive materials and technologies, as well as waste management, should be used. Concrete production is responsible for significant energy consumption and CO2 production; therefore, it is necessary to look for new solutions in which components are replaced by other materials, preferably recycled. A positive way is to use glass waste. In order to determine the effect of a significant glass cullet content on the properties of concrete, glass powder was used as a filler and 100% glass aggregate. The cement–glass composite has low tensile strength and brittle failure. In order to improve tensile strength, the effects of adding polypropylene fibres on the mechanical properties of the composite were investigated. With the addition of 300, 600, 900, 1200, and 1500 g/m3 of fibres, which corresponds to 0.0625%, 0.1250%, 0.1875%, 0.2500%, and 0.3125% of cement mass, respectively, flexural strength increased compared with the base sample by 4.1%, 8.2%, 14.3%, 20.4%, and 26.5%, respectively, while the increase in splitting strength was 35%, 45%, 115%, 135%, and 185%, respectively. Moreover, with the addition of fibres, a decrease in slump by 25.9%, 39.7%, 48.3%, 56.9%, and 65.5%, respectively, compared with the reference specimen was determined.
Marcin Małek; Waldemar Łasica; Marta Kadela; Janusz Kluczyński; Daniel Dudek. Physical and Mechanical Properties of Polypropylene Fibre-Reinforced Cement–Glass Composite. Materials 2021, 14, 637 .
AMA StyleMarcin Małek, Waldemar Łasica, Marta Kadela, Janusz Kluczyński, Daniel Dudek. Physical and Mechanical Properties of Polypropylene Fibre-Reinforced Cement–Glass Composite. Materials. 2021; 14 (3):637.
Chicago/Turabian StyleMarcin Małek; Waldemar Łasica; Marta Kadela; Janusz Kluczyński; Daniel Dudek. 2021. "Physical and Mechanical Properties of Polypropylene Fibre-Reinforced Cement–Glass Composite." Materials 14, no. 3: 637.
Contemporary solar power engineering enables the conceptual interlocking of the shape of a building object with its location, structural design, and external envelope, as well as applied materials. Suitably selected solutions involving the structure, shape, construction, and location of a building can significantly improve the thermal balance of rooms in a building. Particularly valuable and warranted are studies involving various solutions for building partitions contributing to a considerable improvement in the thermal balance of a building. This article presents the results of research on temperature changes on the surface of the external part of a partition coated with layers of different colors. For the lightest coating (white), both the average temperature obtained on the and the maximum temperature obtained on the surface were the lowest. With the darker coatings, these temperatures were both higher. The back analyses that were performed indicated lower and higher absorption coefficients, respectively, for the coating compared with the base value for the red coating. Additionally, it was demonstrated that the average surface roughness (Ra) after tests in a natural environment decreased by 12.1% for the base (red) coating. For the grey and white samples, a more than two-fold increase in roughness was reported, of 198.6% and 202.0%, respectively. The SEM analysis indicated material loss and discoloration on the sample surfaces.
Iwona Pokorska-Silva; Marta Kadela; Marcin Małek; Lidia Fedorowicz. An Assessment of the Thermal Behavior of Envelope Surface Coatings with Different Colors. Polymers 2020, 13, 82 .
AMA StyleIwona Pokorska-Silva, Marta Kadela, Marcin Małek, Lidia Fedorowicz. An Assessment of the Thermal Behavior of Envelope Surface Coatings with Different Colors. Polymers. 2020; 13 (1):82.
Chicago/Turabian StyleIwona Pokorska-Silva; Marta Kadela; Marcin Małek; Lidia Fedorowicz. 2020. "An Assessment of the Thermal Behavior of Envelope Surface Coatings with Different Colors." Polymers 13, no. 1: 82.
The components of foamed concrete have a significant effect on its properties. Protein-based foamed concrete is used much more often. This study aims to assess the properties of foamed concrete with a density of around 500, 700, 800 and 1000 kg/m3 formed by using a synthetic polymer-based foaming agent. The distribution of pores, wet and dry density and compressive strengths were evaluated. In addition, the creep deformations of foamed concrete with different densities were measured. The difference in density of up to 170 kg/m3 for the highest densities was obtained. Foamed concrete with higher densities (700 and 800 kg/m3) showed similar characteristics of pores, which were different from those of samples with a density of 500 kg/m3. Compressive strength equal to 5.9 ± 0.2, 5.1 ± 0.2, 3.8 ± 0.3 and 1.4 ± 0.2 MPa was obtained for foamed concrete with a density of 500, 700, 800 and 1000 kg/m3, respectively. The obtained compressive strengths were higher than those found in the literature for the foamed concrete with the same densities. With increasing density, smaller creep deformations were obtained. Creep deformations were 509, 495 and 455 με for samples with densities of around 500, 700 and 1000 kg/m3 respectively. Deformation under long-term loading took place up to 90 days, regardless of the density of the foamed concrete.
Marta Kadela; Alfred Kukiełka; Marcin Małek. Characteristics of Lightweight Concrete Based on a Synthetic Polymer Foaming Agent. Materials 2020, 13, 4979 .
AMA StyleMarta Kadela, Alfred Kukiełka, Marcin Małek. Characteristics of Lightweight Concrete Based on a Synthetic Polymer Foaming Agent. Materials. 2020; 13 (21):4979.
Chicago/Turabian StyleMarta Kadela; Alfred Kukiełka; Marcin Małek. 2020. "Characteristics of Lightweight Concrete Based on a Synthetic Polymer Foaming Agent." Materials 13, no. 21: 4979.
The thermal assessment of a building is very important for the selection of heating installations, ensuring the well-being of its users and a sustainable building lifecycle. The purpose of the research was to recreate numerically the thermal behavior of a building in time. Numerical analyses and in-situ tests were carried out. The temperature of the envelope surface of a dome-shaped building and climatic parameters were measured in real conditions. The results were used to verification of the numerical model of the building. The object was described by coupled equations of heat and mass transfer, which were solved by the finite volume method. The influence of time discretisation and the physical properties of the envelope materials (ρ, c, λ, ε, α) on the temperature of the external envelope surface were determined. It was demonstrated that the absorption coefficient of the external layer material was influential on the results. Based on the results of the numerical analyses and in-situ test was to ascertain the reliability of numerically recreate of the building thermal behavior. Method of creating reliable numerical model of a dome building, with application of general data from a typical meteorological year in order to assess its thermal behavior was determined.
Iwona Pokorska-Silva; Marta Kadela; Lidia Fedorowicz. A reliable numerical model for assessing the thermal behavior of a dome building. Journal of Building Engineering 2020, 32, 101706 .
AMA StyleIwona Pokorska-Silva, Marta Kadela, Lidia Fedorowicz. A reliable numerical model for assessing the thermal behavior of a dome building. Journal of Building Engineering. 2020; 32 ():101706.
Chicago/Turabian StyleIwona Pokorska-Silva; Marta Kadela; Lidia Fedorowicz. 2020. "A reliable numerical model for assessing the thermal behavior of a dome building." Journal of Building Engineering 32, no. : 101706.
A responsible approach towards sustainable development requires the use of environmentally friendly, low-carbon, and energy-intensive materials. One positive way is to use glass waste as a replacement for fine natural aggregate. For this purpose, the effects of adding glass cullet to the mechanical properties of mortar were carried out. The glass aggregate made from recycled post-consumer waste glass (food, medicine, and cosmetics packaging, including mostly bottles), were used. This experimental work included four different contents of fine glass cullet (5, 10, 15, and 20 wt.% of fine aggregate). The compressive, flexural, and split tensile strengths were evaluated. Moreover, the modulus of elasticity and Poisson coefficient were determined. The addition of glass sand aggregate increases the mechanical properties of mortar. When comparing the strength, the obtained improvement in split tensile strength was the least affected. The obtained effect for the increased analysed properties of the glass sand aggregate content has been rarely reported. Moreover, it was determined that by increasing the recycled glass sand aggregate content, the density of mortar decreased. In addition, the relationships between the properties for mortar containing glass sand aggregate were observed.
Marcin Małek; Waldemar Łasica; Mateusz Jackowski; Marta Kadela. Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar. Materials 2020, 13, 3189 .
AMA StyleMarcin Małek, Waldemar Łasica, Mateusz Jackowski, Marta Kadela. Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar. Materials. 2020; 13 (14):3189.
Chicago/Turabian StyleMarcin Małek; Waldemar Łasica; Mateusz Jackowski; Marta Kadela. 2020. "Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar." Materials 13, no. 14: 3189.
High-performance concrete has low tensile strength and brittle failure. In order to improve these properties of unreinforced concrete, the effects of adding recycled polypropylene fibers on the mechanical properties of concrete were investigated. The polypropylene fibers used were made from recycled plastic packaging for environmental reasons (long degradation time). The compressive, flexural and split tensile strengths after 1, 7, 14 and 28 days were tested. Moreover, the initial and final binding times were determined. This experimental work has included three different contents (0.5, 1.0 and 1.5 wt.% of cement) for two types of recycled polypropylene fibers. The addition of fibers improves the properties of concrete. The highest values of mechanical properties were obtained for concrete with 1.0% of polypropylene fibers for each type of fiber. The obtained effect of an increase in mechanical properties with the addition of recycled fibers compared to unreinforced concrete is unexpected and unparalleled for polypropylene fiber-reinforced concrete (69.7% and 39.4% increase in compressive strength for green polypropylene fiber (PPG) and white polypropylene fiber (PPW) respectively, 276.0% and 162.4% increase in flexural strength for PPG and PPW respectively, and 269.4% and 254.2% increase in split tensile strength for PPG and PPW respectively).
Marcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela. Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement. Materials 2020, 13, 1827 .
AMA StyleMarcin Małek, Mateusz Jackowski, Waldemar Łasica, Marta Kadela. Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement. Materials. 2020; 13 (8):1827.
Chicago/Turabian StyleMarcin Małek; Mateusz Jackowski; Waldemar Łasica; Marta Kadela. 2020. "Characteristics of Recycled Polypropylene Fibers as an Addition to Concrete Fabrication Based on Portland Cement." Materials 13, no. 8: 1827.
Analysis of the construction market in Poland and its trends in the recent years indicates a resurgence of prefabricated technology in residential construction. The main period of prefabrication development in Poland was in the 1970s. when it was referred to as large panel. According to a report by Building Research Institute, buildings constructed with large panels are characteristics for their high durability and any damage occurring in the buildings built using the technology can be divided into two groups. The first is damage similar to that occurring in traditional construction, such as damage to partition walls, roof covering or installations. The other is damage related to the prefabrication technology itself, i.e. the production of elements (material damage) and their assembly (damage at connections). Other potential threats include mining activity in the case of buildings located in mining areas and gas explosions related to the gas systems present in this type of building. This paper, therefore, attempts to recreate the process and consequences of an explosion in a closed room of a multi-family building using a numerical model. The simulations are based on: literature data (concerning calculating and applying explosion actions) and own experience in assessing the response of a concrete structure described using an elastic-plastic-damage (e-p-d) model. The result of the analyses included indication of areas directly affected by risk of loss of stability (with potential expansion of disaster area). The paper also presents the effect of "expulsion" of an external wall due to explosion. It was found that structure failure states obtained in the analyses are fully compatible in qualitative sense with observed real construction disasters caused by explosions. Real quantitative trustworthiness should result from laboratory tests of materials from which the buildings under analysis are built of.
Marta Kadela; Andrzej Cińcio; Jan Fedorowicz; Robert Gerylo. Attempt at Numerical Representation of Gas Explosion in a Large Panel Building. IOP Conference Series: Materials Science and Engineering 2019, 603, 052023 .
AMA StyleMarta Kadela, Andrzej Cińcio, Jan Fedorowicz, Robert Gerylo. Attempt at Numerical Representation of Gas Explosion in a Large Panel Building. IOP Conference Series: Materials Science and Engineering. 2019; 603 (5):052023.
Chicago/Turabian StyleMarta Kadela; Andrzej Cińcio; Jan Fedorowicz; Robert Gerylo. 2019. "Attempt at Numerical Representation of Gas Explosion in a Large Panel Building." IOP Conference Series: Materials Science and Engineering 603, no. 5: 052023.
Knowledge of temperature distribution in relation to time and depth is necessary in many applications. These include: designing GSHP (ground source heat pump) and EAHE (earth-air heat exchangers) systems, calculating heat loss in buildings, in determining foundation depth for buildings and structures with consideration of frost penetration depth, designing pavement of roads and airports or designing underground systems of energy transmission. Regular measurements and perfecting models describing temperature in the ground is therefore extremely valuable. This article presents authors' own research on ground temperature changes in time and distribution of temperature at different depths, up to c. 2.0 m beneath ground level. The tests were performed in the Silesia region over a period of 6 months between May and October, using thermistors installed in the ground at various depths. The measurements were compared with temperature of the air, measured at test stations using a meteorological multisensor in order to find a correlation. Aside from readings of temperature over time and profiles of ground temperatures the paper contains selected elements of statistical analysis of the measurements. It was noted that the temperature distribution is closely related to depth below ground level, and the influence of outside temperatures decreases with depth.
Iwona Pokorska-Silva; Marta Kadela; Lidia Fedorowicz. Variations of Ground Temperature in Shallow Depths in the Silesian Region. IOP Conference Series: Materials Science and Engineering 2019, 603, 052024 .
AMA StyleIwona Pokorska-Silva, Marta Kadela, Lidia Fedorowicz. Variations of Ground Temperature in Shallow Depths in the Silesian Region. IOP Conference Series: Materials Science and Engineering. 2019; 603 (5):052024.
Chicago/Turabian StyleIwona Pokorska-Silva; Marta Kadela; Lidia Fedorowicz. 2019. "Variations of Ground Temperature in Shallow Depths in the Silesian Region." IOP Conference Series: Materials Science and Engineering 603, no. 5: 052024.
Marta Kadela; Instytut Techniki Budowlanej; Iwona Pokorska-Silva; Lidia Fedorowicz; Wydział Budownictwa Politechnika Śląska; Wydział Architektury Wyższa Szkoła Techniczna w Katowicach. BADANIA IN SITU I SYMULACJE NUMERYCZNE W OCENIE ZACHOWAŃ TERMICZNYCH OBIEKTÓW BUDOWLANYCH. Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo 2018, 173, 126 -137.
AMA StyleMarta Kadela, Instytut Techniki Budowlanej, Iwona Pokorska-Silva, Lidia Fedorowicz, Wydział Budownictwa Politechnika Śląska, Wydział Architektury Wyższa Szkoła Techniczna w Katowicach. BADANIA IN SITU I SYMULACJE NUMERYCZNE W OCENIE ZACHOWAŃ TERMICZNYCH OBIEKTÓW BUDOWLANYCH. Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo. 2018; 173 (23):126-137.
Chicago/Turabian StyleMarta Kadela; Instytut Techniki Budowlanej; Iwona Pokorska-Silva; Lidia Fedorowicz; Wydział Budownictwa Politechnika Śląska; Wydział Architektury Wyższa Szkoła Techniczna w Katowicach. 2018. "BADANIA IN SITU I SYMULACJE NUMERYCZNE W OCENIE ZACHOWAŃ TERMICZNYCH OBIEKTÓW BUDOWLANYCH." Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo 173, no. 23: 126-137.
Foamed concrete shows excellent physical characteristics such as low self weight, relatively high strength and superb thermal and acoustic insulation properties. It allows for minimal consumption of aggregate, and by replacement of a part of cement by fly ash, it contributes to the waste utilization principles. For many years, the application of foamed concrete has been limited to backfill of retaining walls, insulation of foundations and roof tiles sound insulation. However, during the last few years, foamed concrete has become a promising material for structural purposes. A series of tests was carried out to examine mechanical properties of foamed concrete mixes without fly ash and with fly ash content. In addition, the influence of 25 cycles of freezing and thawing on the compressive strength was investigated. The apparent density of hardened foamed concrete is strongly correlated with the foam content in the mix. An increase of the density of foamed concrete results in a decrease of flexural strength. For the same densities, the compressive strength obtained for mixes containing fly ash is approximately 20% lower in comparison to the specimens without fly ash. Specimens subjected to 25 freeze-thaw cycles show approximately 15% lower compressive strengths compared to the untreated specimens.
Marcin Kozłowski; Marta Kadela. Mechanical Characterization of Lightweight Foamed Concrete. Advances in Materials Science and Engineering 2018, 2018, 1 -8.
AMA StyleMarcin Kozłowski, Marta Kadela. Mechanical Characterization of Lightweight Foamed Concrete. Advances in Materials Science and Engineering. 2018; 2018 ():1-8.
Chicago/Turabian StyleMarcin Kozłowski; Marta Kadela. 2018. "Mechanical Characterization of Lightweight Foamed Concrete." Advances in Materials Science and Engineering 2018, no. : 1-8.
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Marta Kadela. Pianobeton w budownictwie komunikacyjnym. MATERIAŁY BUDOWLANE 2018, 1, 82 -83.
AMA StyleMarta Kadela. Pianobeton w budownictwie komunikacyjnym. MATERIAŁY BUDOWLANE. 2018; 1 (3):82-83.
Chicago/Turabian StyleMarta Kadela. 2018. "Pianobeton w budownictwie komunikacyjnym." MATERIAŁY BUDOWLANE 1, no. 3: 82-83.
The paper presents results of a combined experimental and numerical study on the fracture behaviour of low–density foamed concrete (< 1100 kg/m3). A series of static tests was carried out on notched beams tested in three-point bending to determine the fracture properties of foamed concrete. Based on the load–displacement responses fracture energy and maximal tensile stress were evaluated. The paper also presents the results of numerical investigation of the fracture behaviour of notched beams using Extended Finite Element Method (XFEM). The numerical studies involve a simulation of fracture initiation and crack evolution in the notched beams subjected to three–point bending.
Marcin Kozłowski; M Kadela. Combined Experimental and Numerical Study on Fracture Behaviour of Low–Density Foamed Concrete. IOP Conference Series: Materials Science and Engineering 2018, 324, 012031 .
AMA StyleMarcin Kozłowski, M Kadela. Combined Experimental and Numerical Study on Fracture Behaviour of Low–Density Foamed Concrete. IOP Conference Series: Materials Science and Engineering. 2018; 324 (1):012031.
Chicago/Turabian StyleMarcin Kozłowski; M Kadela. 2018. "Combined Experimental and Numerical Study on Fracture Behaviour of Low–Density Foamed Concrete." IOP Conference Series: Materials Science and Engineering 324, no. 1: 012031.
The paper discusses behaviour of masonry walls constructed with small-sized elements under the effects of mining activity. It presents some mechanisms of damage occurring in such structures, its forms in real life and the behaviour of large fragments of masonry walls subjected to specific loads in FEM computational models. It offers a constitutive material model, which enables numerical analyses and monitoring of the behaviour of numerical models as regards elastic-plastic performance of the material, with consideration of its degradation. Results from the numerical analyses are discussed for isolated fragments of the wall subjected to horizontal shear, with consideration of degradation, impact of imposed vertical load as well as the effect of weakening of the wall, which was achieved by introducing openings in it, on the performance and deformation of the wall.
Marta Kadela; Marek Bartoszek; Jan Fedorowicz. Behaviour of Masonry Walls under Horizontal Shear in Mining Areas. IOP Conference Series: Earth and Environmental Science 2017, 95, 022047 .
AMA StyleMarta Kadela, Marek Bartoszek, Jan Fedorowicz. Behaviour of Masonry Walls under Horizontal Shear in Mining Areas. IOP Conference Series: Earth and Environmental Science. 2017; 95 (2):022047.
Chicago/Turabian StyleMarta Kadela; Marek Bartoszek; Jan Fedorowicz. 2017. "Behaviour of Masonry Walls under Horizontal Shear in Mining Areas." IOP Conference Series: Earth and Environmental Science 95, no. 2: 022047.
Structure monitoring systems are increasingly used to assess the technical condition and improve the safety of structures. Monitoring the structural behaviour becomes necessary in the case of structures located in areas with complicated ground conditions. Due to the risk of failures and the resulting economic and non-material costs, monitoring should be in particular applied to linear structures, including railways, tramlines, motorways and expressways, as well as related facilities (e.g. bridges). Monitoring shall consist in regular observations, measurements and documenting all significant data during construction, after its completion and during usage, and in analysing and evaluating the results. This paper presents the application of structure monitoring systems to the assessment of the behaviour of bridges exposed to the impact of mining operations.
Beata Parkasiewicz; Marta Kadela; Piotr Bętkowski; Rafał Sieńko; Łukasz Bednarski. Application of Structure Monitoring Systems to the Assessment of the Behaviour of Bridges in Mining Areas. IOP Conference Series: Materials Science and Engineering 2017, 245, 032018 .
AMA StyleBeata Parkasiewicz, Marta Kadela, Piotr Bętkowski, Rafał Sieńko, Łukasz Bednarski. Application of Structure Monitoring Systems to the Assessment of the Behaviour of Bridges in Mining Areas. IOP Conference Series: Materials Science and Engineering. 2017; 245 (3):032018.
Chicago/Turabian StyleBeata Parkasiewicz; Marta Kadela; Piotr Bętkowski; Rafał Sieńko; Łukasz Bednarski. 2017. "Application of Structure Monitoring Systems to the Assessment of the Behaviour of Bridges in Mining Areas." IOP Conference Series: Materials Science and Engineering 245, no. 3: 032018.
This paper describes the small strains phenomenon which occurs in the subgrade under a pavement, a phenomenon documented through in-situ tests and recreated in numerical analyses, which lends a practical engineering aspect to the subject matter. The analyses were preceded by: 1) presentation of the role of constitutive models in structure-subgrade system analysis, 2) reference to methods of modelling in mechanistic procedures and possibility of reliable assessment of criterial values in road structures. These studies were coupled with a description of field tests, which recorded strains in subgrade under a loaded pavement: in zone I directly under the pavement – variable, depending on stiffness of the pavement and the load (about 200÷1000.10-6) and below that, in zone II – 'stabilised' (about 1÷5.10-6). In summary, it has been found that the accuracy of numerical analyses of structure-subgrade systems is dependent on the adopted constitutive model of the soil and the numerical calculation area representing the subgrade. Recreation and analysis of the pavement-subgrade system behaviour employed the MCC(OC) critical state model. It was determined that a reliable response of the computational model to the load path used can be obtained with a model that has been previously properly calibrated. The paper justifies the need to carry out further, directed field tests, coupled with numerical analyses employing relevant constitutive models for description of the soil's performance.
Lidia Fedorowicz; Marta Kadela. Recreation of Small Strains Phenomenon under Pavement Structure and Consequences of Failure to Address It. IOP Conference Series: Materials Science and Engineering 2017, 245, 22005 .
AMA StyleLidia Fedorowicz, Marta Kadela. Recreation of Small Strains Phenomenon under Pavement Structure and Consequences of Failure to Address It. IOP Conference Series: Materials Science and Engineering. 2017; 245 ():22005.
Chicago/Turabian StyleLidia Fedorowicz; Marta Kadela. 2017. "Recreation of Small Strains Phenomenon under Pavement Structure and Consequences of Failure to Address It." IOP Conference Series: Materials Science and Engineering 245, no. : 22005.