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1
Content available Gospodarka materiałami azbestowymi w aspekcie bezpieczeństwa życia i pracy
100%
Ulewicz M.
Przegląd Budowlany
|
2023
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tom R. 94, nr 9-10
171--176
PL
W niniejszym artykule przedstawiono najnowsze dane statystyczne (2020-2021) odnośnie wielkości produkcji górniczej azbestu, handlu azbestem surowym i wyrobami azbestowymi na świecie. Scharakteryzowano uwarunkowania prawne gospodarki azbestem i wyrobami azbestowymi oraz nowy trend przetwarzania azbestowych odpadów flotacyjnych. Zidentyfikowano zasoby wyrobów azbestowo-cementowych wbudowanych w pokrycia dachowe w 27 krajach Unii Europejskiej. Podjęto próbę odpowiedzi na pytanie, czy doniesienia naukowe o skutkach wdychania włókien azbestowych mają wpływ na działania w zakresie gospodarki azbestem i odpadowymi materiałami azbestowymi, a także czy te działania uwzględniają bezpieczeństwo pracowników.
XX
This article presents the latest statistical data (2020 and 2021) on the volume of asbestos mining production, trade in raw asbestos and asbestos products in the world. The legal conditions of asbestos and asbestos products management as well as the new trend of asbestos flotation waste processing are characterized. Resources of asbestos-cement products incorporated into roofing materials in 27 countries of the European Union were identified. An attempt was made to answer the question whether the knowledge of the effects of inhaling asbestos fibers affects the activities in the field of asbestos and asbestos waste management, and whether they take into account the safety of employees.
2
Content available remote Intensywność odbicia naziemnego skanowania laserowego w zależności od właściwości fizycznych materiałów budowlanych i warunków skanowania
63%
Ulewicz M. , Pawłowicz J. A.
|
2022
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tom nr 11
63--65
PL
W sektorze budowlanym obserwowany jest w ostatnich latach duży wzrost zainteresowania techniką naziemnego skaningu laserowego (TLS). Jednym z czynników w tej technice, który ma wpływ na moc odbitej wiązki lasera, jest rodzaj skanowanej powierzchni uzależniony od właściwości fizykochemicznych skanowanych materiałów. W artykule wykazano, że gęstość i nasiąkliwość badanego materiału, rozdzielczość skanowania oraz tło pomiarów wpływają na jakość uzyskanej chmury punktów, a technika TLS ma duży potencjał wspomagania procesów identyfikacji wizualnej materiałów wbudowanych w obiekty budowlane.
EN
In the construction sector, there has been a large increase in interest in the Terrestrial Laser Scanning (TLS) technique in recent years. One of the factors influencing the power of the reflected laser beam in this technique is the type of the scanned surface, determined by the physicochemical properties of the scanned materials. The study showed that the density and water absorption of the tested material, scanning resolution and measurement background affect the quality of the obtained point cloud, and the TLS technique has a great potential to support the processes of visual identification of materials built into the structure.
3
Content available Influence of public financial support on the process of roof covering replacement and safety of civil structures
63%
Ulewicz M. , Liszewski W.
System Safety : Human - Technical Facility - Environment
|
2020
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tom Vol. 2, nr 1
259--267
EN
This article constitutes an analysis of the influence of public financial support on the process of replacement of the asbestos-cement sheets used as a roof covering for materials safe for the environment. Commonly used asbestos-cement sheets, known under the commercial name of „Eternit”, should be removed of civil structures by 2032 following a program established by the Polish state. However, the carried-out analysis indicates that until present times the products containing asbestos have been properly identified in all municipalities across Poland, and also the amount of financial support that a property owner may obtain for removal of products containing asbestos is relatively low comparing to the costs of the roofing replacement. The cost of roof covering replacement falls within the range. 18.417 – 41.232 PLN/m², so for the roof area of 100 m² and considering the simplest roof structure (gable roof) the cost would total between 18.417 and 41.232 PLN. Therefore the existing system of public financial support providing funds for asbestos removal only will not affect the investor’s decision regarding replacement of roof covering and increase of civil structures safety. The replacement process of dangerous Eternit roof covering is slow and most probably the established programmed will not be completed on time.
4
Content available Application of the SWOT-TOWS analysis as a supporting tool when selecting a strategy for the implementation of local concrete roads
63%
Brycht N. , Ulewicz M.
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
|
2023
|
tom z. 172
61--71
EN
Purpose: The aim of the article is to present the practical application of the SWOT-TOWS analysis when choosing a strategy for the implementation of local government roads in concrete technology. Design/methodology/approach: The research includes the identification of the characteristics of concrete pavement and the indication of the most advantageous action strategy using the SWOT analysis extended by examining additional TOWS connections. Elements of the statistical and observational methods were used, based on literature reports. Findings: The analysis showed a correlation between internal and external factors, which resulted in the selection of the most optimal solution in the examined case, which turned out to be an aggressive strategy. Research limitations/implications: The presented analysis is not comprehensive, but it is a helpful tool for strategic analysis, the results of which are important information for further research on the discussed issue. Practical implications: The presented analysis can be successfully used by investors and contractors as an auxiliary tool when choosing a road investment implementation strategy, thanks to the possibility of adjusting the criteria of weights conditioned by the location of a given project and the agreed preferences. Originality/value: Simultaneous use of the SWOT-TOWS analysis with other analytical tools will allow in practice for quick and easy decision making when choosing the most advantageous strategy for the implementation of road investments.
5
Content available remote Wykorzystanie skaningu laserowego 3D do inwentaryzacji materiałów w obiektach przeznaczonych do rozbiórki
63%
Ulewicz M. , Pawłowicz J. A.
|
2022
|
tom nr 12
50--52
PL
Wykonanie prawidłowej inwentaryzacji materiałów w obiektach budowlanych przeznaczonych do rozbiórki, uwzględniającej łatwość ich odzysku, jest procesem czasochłonnym i kosztownym. W artykule wykazano, że proces ten można usprawnić, wykorzystując technologię skanowania laserowego 3D, która z powodzeniem jest stosowana przy sporządzaniu dokumentacji inwentaryzacyjnej obiektów zabytkowych i w wielu innych dziedzinach gospodarki. Technologia skaningu laserowego 3D może być w przyszłości stosowana do pomiaru kubatury obiektów budowlanych oraz identyfikacji podstawnych materiałów rozbiórkowych przeznaczonych do recyklingu.
EN
Performing a proper inventory of materials in construction objects intended for demolition, taking into account the ease of their recovery, is a time-consuming and costly process. This paper shows that this process can be improved by using 3D laser scanning technology, which is successfully used in the preparation of inventory documentation of historic buildings and in many other areas of the economy. The 3D laser scanning technology can be used in the future to measure the volume (cubic capacity) of building objects and to identify basic demolition materials for recycling.
6
Content available Investigation of thermal and air efficiency in trombe wall of modular building
51%
Zhelykh V. , Ulewicz M. , Furdas Y. , Shepitchak V.
Archives of Civil Engineering
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2023
|
tom Vol. 69, nr 4
663--678
EN
The proposed Trombe wall design is an innovative and effective solution for addressing issues related to building energy efficiency. The Trombe wall can help reduce a building’s energy consumption, provide optimal indoor temperature, and minimize the building’s environmental impact by utilizing renewable energy sources. The article deals with the study of the heat-air characteristics of the Trombe Wall, which performs the functions of external protection of a modular house, with the aim of further evaluating the possibility of using it as a hybrid protection with additional heating and ventilation functions assigned to it. The results of experimental research conducted on one of the elements of external protection of a modular house in the form of the Trombe Wall are presented. The experimentally obtained graphic dependences were compared with the calculated data and the convergence was evaluated. The proposed design allows you to organize air exchange in the premises with a multiplicity within 1-1.5 h-1, and also provides an opportunity to provide additional thermal power in the amount of 250 W/m2. The article presents the results of experimental studies that allow to evaluate the thermal characteristics of the proposed design of external protection for a modular house. These results indicate that with the given geometric dimensions, in particular with a volume of 14 m3, the thermal power utilized by the Trombe wall is within 0.2-0.7 kW.
7
Content available Implementation of lean instruments in ceramics industries
51%
Ulewicz R. , Kleszcz D. , Ulewicz M.
Management Systems in Production Engineering
|
2021
|
tom nr 3 (29)
203--207
EN
The article presents the results of the research on the level of implementation of Lean instruments in the ceramics industry. The research was carried out in ceramic factories in Poland and Germany. Based on the results obtained, the most commonly used Lean instruments in the ceramics industry were defined. The dependence of the use of Lean instruments on the size of the enterprise was also determined. It was established that the Lean activities undertaken in the ceramics industry are focused solely on the implementation of individual methods and tools, without a pre-defined goal. This approach in the ceramics industry is ineffective, but unfortunately it is most often used in the implementation of the Lean philosophy, especially in small ceramics enterprises.
8
Content available Analysis of the influence of the heat-absorbing surface of an air-cooled solar collector on its thermal and mechanical properties
45%
Zhelykh V. , Ulewicz M. , Kozak K. , Savchenko O. , Kasynets M.
System Safety : Human - Technical Facility - Environment
|
2019
|
tom Vol. 1, nr 1
481--489
EN
This paper presents the analysis of existing forms of heat absorbing surfaces of air solar collectors, which gained the greatest popularity in the world. The obtained data allowed to conclude that there is a need for the development of solar collectors with air as a coolant with an improved form of heat absorber, which will reduce the operational and capital costs of solar systems and allow the efficient use of such structures in a moderate climate without additional mechanisms for the transfer of coolant. The use of computer simulation helped to compare the thermal characteristics of air-borne solar collectors of a different design. The substantiation of the expediency of installing as a heat absorber of flow turbulators in the form of a screw has been fulfilled, as well as the height of the air channel of the solar collector has been determined, in which the maximum heating of the transfer medium is observed. In addition, the loss of pressure in the air channel of the solar collector with flow turbulators was determined and the comparison of the obtained data with the values of pressure losses in the air collector of the matrix type and the air collector with V-shaped ribs was made.
9
Content available Innovative acoustic emission method for monitoring the quality and integrity of ferritic steel gas pipelines
38%
Świt G. , Ulewicz M. , Pała R. , Adamczak-Bugno A. , Lipiec S. , Krampikowska A. , Dzioba I.
Production Engineering Archives
|
2024
|
tom Vol. 30, Iss. 2
233--240
EN
This article presents a comprehensive improvement in the experimental analysis of cracking processes in smooth and sharp V-notched samples taken from gas transport pipelines, utilizing the acoustic emission (AE) method. The research aimed to establish a robust correlation between the failure mechanisms of uniaxially tensile samples and the distinct characteristics of AE signals for enhanced quality management in pipeline integrity. The study encompassed materials from two different straight pipe sections, encompassing both long-term used materials and new, unused materials. Through the application of the k-means grouping method to AE signal analysis, we achieved the identification of AE signal parameters characteristic of various stages of the material destruction process. This advancement introduces a significant improvement in monitoring and managing the operational safety of pipeline networks, offering a methodology that leverages advanced acoustic emission signal analysis. The outcomes present significant implications for the pipeline industry by proposing methods to enhance safety systems and more effectively manage the integrity and quality of gas infrastructure.
10
Content available Experimental-numerical analysis of the fracture process in smooth and notched V specimens
38%
Świt G. , Dzioba I. , Ulewicz M. , Lipiec S. , Adamczak-Bugno A. , Krampikowska A.
Production Engineering Archives
|
2023
|
tom Vol. 29, Iss. 4
444-451
EN
This paper presents the outcomes of quality tests conducted on specimens, both smooth and V-notched, subjected to uniaxial tension, which were extracted from a gas transport pipeline. The introduction of the V-notch introduced variations in the stress and strain component fields near the plane of maximum constriction, consequently leading to their failure through different mechanisms. The process included the implementation of quality management practices such as numerical modeling and simulation of the loading of the specimens using ABAQUS. The material model employed in these calculations was defined and verified to ensure quality control. Subsequent to the numerical calculations, maps of the stress and strain component fields were generated, contributing to the quality assessment of the specimens. It was determined that the quality management process for the smooth specimen identifies the initiation of failure primarily due to the normal stress component in the central region of the plane with the largest constriction. In contrast, in the V-notched specimen, quality management efforts revealed that failure initiation occurs due to the tangential stress component, and failure proceeds through the shear mechanism. These results are valuable in developing a quality-driven methodology for monitoring the operational safety of gas network pipelines, primarily based on the analysis of acoustic emission signals.
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