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1

Influence of ground waste glass addition on concrete prepared with their participation properties

Jeleniewicz Katarzyna, Rutkowska Gabriela, Żółtowski Mariusz, Kula Dorota

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2023

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nr 73 (145)

46--53

EN

Caring for the environment, in accordance with the principles of sustainable development, as well as the increase in the standard of living of society, introduces the need to conduct proper waste management. Construction is an industry with great potential for the management of glass waste as part of material recycling. The construction sector is characterized by high material consumption, with a limited amount of natural resources, meaning that research is constantly being performed on the possibility of replacing them with other common ingredients. A feature of the building materials industry is also the pursuit of continuous improvement of the properties of manufactured materials. The paper presents the research results on the impact of the partial replacement of Portland cement and aggregate with glass waste on strength parameters and frost resistance. For the purpose of experimental work, a concrete mix based on the C20/25 standard concrete with CEM I 42.5R Portland cement, in which from 0 to 20% of the cement or aggregate weight is replaced with glass waste (i.e., glass flour and glass cullet), is designed. In the test range, the glass flour slightly affected the deterioration of the compressive strength, while the glass cullet had no effect on the compressive strength after 56 days of maturation. Moreover, the addition of glass flour increases the bending strength, while the addition of glass cullet maintains a comparable bending strength compared to the reference concrete. The obtained concretes are frost-resistant concrete F150.

2

The impact of air quality and meteorological conditions including visibility on tourism: the case of Zakopane (Poland)

Anioł Ewa, Szeląg Bartosz, Kula Dorota, Ignar Stefan, Majewski Grzegorz

Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej

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2022

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Nr 84

31--53

EN

The aim of the study was to investigate the impact of air pollution and meteorological conditions on visibility in Zakopane, the most popular tourist destination in southern Poland. To achieve this objective, correlation analysis, multiple linear regression analysis and random forests were used. In addition, an analysis was performed of the occurrence of episodes of elevated pollutant concentrations and basic statistical characteristics of visibility, meteorological conditions and air pollution. Meteorological parameters (air temperature, relative humidity, total precipitation, wind speed, atmospheric pressure and visibility) and concentrations of air pollutants; particulate matter (PM₁₀) and gaseous pollutants (SO₂, NO₂) were recorded from 2010 to 2019. The data came from a monitoring station located in Zakopane-MpZakopaSien. It was found that high concentrations of air pollutants SO₂ and PM₁₀, along with relative humidity (RH), were the most important parameters affecting visibility limitation in Zakopane. Concentrations and indirectly also visibility were largely influenced by increased automobile traffic due to tourist activity, as well as emissions from apartment/building heating (combustion of various fuels). Understanding the relationship between air pollutant concentrations, meteorological conditions and visibility is a prerequisite and the basis for the scientific formulation of air pollution prevention and control policies in places where monitoring is particularly important.

PL

Celem pracy było zbadanie wpływu zanieczyszczeń powietrza i warunków meteorologicznych na widoczność w Zakopanem, najpopularniejszej miejscowości turystycznej w południowej Polsce. Do realizacji tego celu wykorzystano analizę korelacji, analizę regresji liniowej wielokrotnej oraz lasy losowe. Ponadto przeprowadzono analizę występowania epizodów podwyższonych stężeń zanieczyszczeń oraz podstawowych charakterystyk statystycznych widoczności, warunków meteorologicznych i zanieczyszczenia powietrza. Parametry meteorologiczne (temperatura powietrza, wilgotność względna, suma opadów, prędkość wiatru, ciśnienie atmosferyczne i widzialność) oraz stężenia zanieczyszczeń powietrza; pyłu zawieszonego (PM₁₀) i zanieczyszczeń gazowych (SO₂, NO₂) rejestrowano od 2010 do 2019 r. Dane pochodziły ze stacji monitoringu zlokalizowanej w Zakopanem – Mp Zakopane. Wykazano, że wysokie stężenia zanieczyszczeń powietrza SO₂ i PM₁₀ wraz z wilgotnością względną (RH) były najważniejszymi parametrami wpływającymi na ograniczenie widzialności w Zakopanem. Na stężenia i pośrednio na widoczność duży wpływ miał wzmożony ruch samochodowy związany z działalnością turystyczną, a także emisja z ogrzewania mieszkań/budynków (spalanie różnych paliw). Zrozumienie zależności pomiędzy stężeniami zanieczyszczeń powietrza, warunkami meteorologicznymi i widocznością jest warunkiem wstępnym i podstawą do naukowego formułowania polityki zapobiegania i kontroli zanieczyszczeń powietrza w miejscach, gdzie monitoring jest szczególnie ważny.

3

Diagnostyka uszkodzeń elementów murowych na podstawie miar liczbowych procesu drganiowego

Żółtowski Mariusz, Rutkowska Gabriela, Dąbkowski Norbert, Jeleniewicz Katarzyna, Kula Dorota, Szlachetka Olga

Materiały Budowlane

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2022

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nr 5

24--26

PL

Konstrukcje budowlane i ich elementy muszą spełniać wymagania dotyczące stateczności, sztywności i nośności. Są to warunki decydujące o bezpieczeństwie konstrukcji zarówno w okresie budowy, jak i eksploatacji. Ocena bezpieczeństwa odbywa się na podstawie badań diagnostycznych mających na celu kontrolę jakości wykonania wznoszonych obiektów lub zlokalizowanie uszkodzeń elementów konstrukcji powstałych podczas eksploatacji. W artykule skupiono się na eksperymentalnej analizie modalnej SISO ceramicznych elementów murowych. Doświadczenie przeprowadzono na dwudziestu próbkach cegły pełnej, z czego celowo uszkodzono połowę z nich, aby możliwa była ocena przydatności zastosowanej metody w postawionym problemie badawczym.

EN

Building structures and their elements must meet the requirements related to stability, stiffness and strength. These are the conditions that determine the safety of the structure both during construction and operation. The safety assessment is carried out on the basis of diagnostic tests aimed at checking the quality of the erected objects or locating damages to structural elements caused during operation. The work focuses on the experimental SISO modal analysis of ceramic masonry elements. The experiment was carried out on twenty samples of solid and perforated bricks, half of which were deliberately damaged and thus to be able to assess the suitability of the method used in the research problem posed.

4

On the damping intensity of the odd Fourier impulse loading the boundary of the periodic composite

Kula Dorota

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2019

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Vol. 28, No. 3

321--331

EN

Investigated in the paper boundary effect behaviour for a single odd amplitude which loads rectangular boundary of the two-phased periodic composite layer confirms the common view through the prism of the expected strong suppression of the boundary impulses of the physical field near the boundary of the region occupied by the composite. There is no presence of a composite reaction to the boundary loadings mentioned here different than the exponential damping effect. However, the presence in the general equation describing the boundary effect equations the component 2?ssurf pqz?q with the first space derivative responsible for suppression of the solution along the axis Oz should cause not only exponential type of boundary temperature fluctuation damping. This component disappears in principle for the boundary effect analysed for a single impulse.

5

Surface localized heat transfer in periodic composites

Kula Dorota, Wierzbicki Ewaryst

Acta Mechanica et Automatica

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2019

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Vol. 13, no. 2

124--129

EN

A characteristic feature of the description of physical phenomena formulated by an appropriate boundary or initial-boundary value problem and occurring in microstructured materials is the investigation of the unknown field in the form of decomposition referred to as micro-macro hypothesis. The first term of this decomposition is usually the integral average of the unknown physical field. The second term is a certain disturbance imposed on the first term and is represented in the form of a finite or infinite number of singleton fluctuations. Mentioned expansion is usually referred to as a two-scale expansion of the unknown physical field. In the paper, we purpose to apply two-scale expansion in the form of a certain Fourier series as a result of an applying Surface Localization of the unknown field. The considerations are illustrated by two examples, which results in analytical approximated solutions to the Effective Heat Conduction Problem for periodic composites, including the full dependence on the microstructure length parameter.