Wyniki wyszukiwania - BazTech

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One-year-long, comprehensive analysis of pm number and mass size distributions in Warszawa (Poland)

Bihałowicz Jan Stefan, Rogula-Kozłowska Wioletta, Rogula-Kopiec Patrycja, Świsłowski Paweł, Rajfur Małgorzata, Tomasz Olszowski

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 4

541--556

EN

The properties of particulate matter PM, including its impact on the environment and human health, depend mainly on the size (more precisely: size distribution) of the particles since the size is usually dependent on the processes/sources of the PM. This work presents the results of a one-year-long measurement campaign of PM. PALAS Fidas 200 from Airpointer air quality station was used. The PM was measured in Warsaw, Poland continuously from 1st May 2022 to 30th April 2023; size distribution was recorded with 120 s intervals and averaged in 3600 s periods. It was found, that the number and the mass size distribution varied depending on the averaging period (different hours of the day, different days of the week, and different months of the year). Additionally, the authors determined the periods of impact on selected sources (traffic emission, municipal emission, and industrial emission) on the number and mass size distributions of PM at the sampling site. Monitoring of number and mass size distributions of PM is a relatively easy and more cost-effective method than analysing the chemical composition of PM. Therefore, is crucial to develop a method of identifying sources of PM based on size distributions. It was found that such a method can be in the future as successful in source apportionment as in the analysis of chemical compositions.

2

Zagospodarowanie drobnych frakcji kruszyw

Naziemiec Zdzisław, Fudalej Piotr

Surowce i Maszyny Budowlane

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2021

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nr 1

74--81

PL

Frakcje drobne uzyskiwane podczas procesów produkcji kruszyw często stanowią materiał trudno zbywalny. Istnieje jednak możliwość ich zagospodarowania, wykorzystując cenną cechę, jaką jest znaczny stopień rozdrobnienia.

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A fine fraction from the recycled concrete as an addition in the cement composites

Pawluczuk E.

Przegląd Naukowy Inżynieria i Kształtowanie Środowiska

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2018

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Vol. 27, No. 3

338--347

EN

The aim of the research was to determine the possibility of using the fine fraction from the recycled concrete to produce the cement composites. The research was based on a rotal plan with two variables: x1 (the amount of the recycled addition, 0-40% c. m.) and x2 (the amount of the superplasticizer, 0-1% c. m.). The recycled material was ground to 0.125 mm and roasted at 700°C. The statistical analysis of the findings led to the conclusion that the recycled fine fraction can be added to the cement composites (up to 20% of the cement mass) without a significant decline in their parameters’ values.

4

Frakcja drobna z recyklingu betonu jako aktywny wypełniacz wyrobów wapienno-piaskowych

Bołtryk M., Kalinowska-Wichrowska K.

Materiały Budowlane

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2017

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nr 8

52--54

PL

W artykule przedstawiono wyniki badań potwierdzające możliwość stosowania odpowiednio przygotowanej drobnej frakcji z recyklingu gruzu betonowego (< 2 mm) jako wypełniacza do produkcji wyrobów wapienno-piaskowych. Stosowana w badaniach frakcja drobna z recyklingu to odpad powstały w wyniku przeróbki gruzu z betonu klasy C30/37 wg technologii opisanej w zgłoszeniu patentowym P. 417362. Badano podstawowe właściwości wyrobów wapienno-piaskowych z wypełniaczem z recyklingu betonu: wytrzymałość na ściskanie, nasiąkliwość oraz samego wypełniacza: uziarnienie, skład fazowy, ciepło twardnienia, analizę termograwimetryczną. W tym celu przygotowano plan badania, zgodnie z którym wykonano siedem serii próbek badawczych o zmiennej zawartości wypełniacza z recyklingu betonu.

EN

The paper presents the results of own research confirming the possibility of using a properly prepared fine fraction (< 2 mm) as a filler for the production of autoclaved sand-lime products. The recycling fine fraction is waste from the processing of concrete debris by the method described in (P.417362), derived from C30/37 concrete. A study was conducted to determine the basic properties of autoclaved sandlime products with recycled filler: compressive strength, water absorbtion and recycled filler: granulation, phase composition, hardening heat, thermogravimetric analysis. For this purpose a test plan was prepared in accordance with 7 series of test with varying content of recycler filler from concrete.

5

Mineralogical and petrographical investigation of sediments from the Tell el Farkha archaeological site, The Nile Delta – Egypt

Słowioczek E.

Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering

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2016

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nr 21

1--83

EN

The first stage focuses on field studies, during which a general geological profile was prepared and samples for laboratory tests were collected. In the next stage, laboratory analyses were conducted: with the use of binocular magnifying glasses, small fractions being the result of the slaking of fragments of the samples from the profile were examined. Then, mineralogical and petrographic examinations of dried bricks were conducted—these included determining the mineral and grainy composition of samples from light and dark bricks. Later, anthropogenic examinations of coals were conducted; the aim of the analysis was to determine their sorption properties. Finally, the results were presented, which included sketches, photographs, microphotographs, tables, and diagrams; the research was summarized, and conclusions that could be drawn from it were demonstrated. The paper helped solve interesting problems on the border of mineralogy, geology, and archeology. All of the conducted research is innovative in nature and contributes much new and important information helping explore this site and the activities of people from thousands of years ago.

PL

W trakcie badań w pierwszym etapie skoncentrowano się na badaniach terenowych. Sporządzono generalny profil geologiczny oraz pobrano próbki konieczne do badań laboratoryjnych. W następnym etapie wykonano analizy laboratoryjne. Przy pomocy lupy binokularnej przyjrzano się drobnym frakcjom pochodzącym z rozlasowania fragmentów próbek z profilu. Potem przeprowadzono badania mineralogiczno-petrograficzne cegieł suszonych. Obejmowały one określenie składu mineralnego i ziarnowego próbek z cegieł jasnych i ciemnych. Później zajęto się badaniami antropogenicznych węgli. Celem analizy było określenie ich właściwości sorpcyjnych. Na zakończenie zaprezentowano wyniki badań, w których zawarto szkice, fotografie, mikrofotografie, tabele i diagramy oraz dokonano podsumowania badań i przedstawiono wnioski, jakie można z nich wyciągnąć. Powstanie pracy pozwoliło na rozwiązanie ciekawych problemów z pogranicza mineralogii, geologii i archeologii. Wszystkie przeprowadzone badania mają charakter nowatorski i wnoszą dużą ilość nowych i istotnych informacji pozwalających poznać stanowisko oraz aktywność ludzi przed tysiącami lat.

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Zagospodarowanie zanieczyszczonych gliną frakcji wapieni z zakładów produkcji kruszyw łamanych

Naziemiec Z.

Prace Instytutu Ceramiki i Materiałów Budowlanych

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2015

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R. 8, nr 21

31--42

PL

W zakładach produkcji kruszyw łamanych z wapieni, w wyniku procesu przeróbki, powstaje pewna część produktów zawierających znaczne ilości zanieczyszczeń gliniastych. Z uwagi na ograniczone możliwości zagospodarowania tych wapieni gromadzone są one na składowiskach. Ilość i charakterystyka zanieczyszczonych frakcji jest bardzo zróżnicowana i zależy od rodzaju eksploatowanego złoża, rodzaju produktów końcowych i stosowanej technologii przeróbki. W artykule podano charakterystykę zanieczyszczonych drobnych frakcji wapieni powstających w wybranych zakładach produkcji kruszyw. Badano ich skład chemiczny, skład ziarnowy i inne właściwości fizyczne. W oparciu o uzyskane wyniki badań wskazano na możliwości ich zagospodarowania. Odpowiednio dobrana technologia przeróbki i przyjęty profil produkcji, dostosowany do warunków panujących w danej kopalni, umożliwia optymalne wykorzystanie eksploatowanej skały.

EN

In limestone broken aggregate processing plants, the fine fractions with a considerable content of clay contaminations are produced. Due to the limited possibilities of utilization of these limestones they are stored on a waste deposits. The amount and characteristics of the contaminated fractions is highly variable and depends on the type of exploited deposit, as well as the type of the final products and processing technology applied. In this paper characteristics of the contaminated fine limestone fractions, arised in the selected aggregate processing plants, were presented. Particle size distribution, chemical composition and chosen physico-mechanical properties were under investigations. Based on the above results, some possibilities of their utilization were proposed. A properly selected and approved processing technology and adopted profile of production adjusted to conditions in the mine, enables an optimal utilization of exploited rocks.

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Description of selected practical properties of materials produced based on fine-fraction inorganic waste

Zawada A., Lisiecka I., Iwaszko J.

Journal of Achievements in Materials and Manufacturing Engineering

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2014

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Vol. 63, nr 2

86--92

EN

Purpose: The paper attempts to evaluate the materials produced by sintering fine fraction waste materials in terms of chemical inertness in the aquatic environment, as well as mechanical strength, scratch and abrasion resistance. Design/methodology/approach: Slag from a solid waste incineration plant and broken packaging glass were used in studies. The tests were performed on cylindrical samples obtained in the process of pressing, with variable amount of raw materials and fraction (fine fraction < 63 μm, thick fraction 100-63 μm). Microscopic analysis (optical microscope) was carried out for obtained sinters, open porosity was determined via hydrostatic weighing, and also resistance to ions leaching in a water environment was studied using the method of specimens boiling in distilled water during 60 minutes followed by measurement of water pH. Abrasion resistance was also assessed via friction of the surface by a freely rotating metal ball (ball tester) as well as resistance to scratching with a diamond. Findings: Microstructural analysis allowed to evaluate the morphology of the examined sinters specifying the size and shape of individual pores, which have a significant effect on the pH value. Definitely a much higher wear resistance of sintered materials showed fine particle and high slag content. This is confirmed by the results of scratch tests conducted on scratch-tester. Research limitations/implications: The obtained results are very promising. Utilisation of such waste in the production of e.g. traditional tile lining is an alternative to natural raw materials. The technology of such products manufacture based on the studied waste is less complicated, economically and environmentally more favourable. However, additional studies are needed, which would enable selecting parameters for designing and producing ceramic floor and wall linings. Practical implications: The research led to characterize slag as raw material, for which, despite diverse chemical composition, it is possible to obtain stable, reproducible levels of the final product properties, so that they are useful for the production of many glass-crystalline building materials. Originality/value: The processes for the production of new products such as building materials and aggregates, will reduce the storage of waste and save natural resources.