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    Wyświetlanie 1-6 z 6
    Tytuł:
    An Investigation on the Advantages and Disadvantages of Chromite and Styrofoam (EPS) Ceilings in Concrete Structures
    Autorzy:
    Khaledyan, Hooshmand
    Powiązania:
    https://bibliotekanauki.pl/articles/1179177.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Styrofoam
    block
    chromite
    composite
    disadvantages and advantages
    Opis:
    The present paper tends to investigate the merits and demerits of chromite and Styrofoam ceilings in concrete structures. Since in lots of buildings and structures chromite and Styrofoam used in ceilings, there are problems with their implementation cause a bunch of advantages and disadvantages. Generally, precast beams or in short joist with blocks including both chromite and concrete, if properly designed, calculate and implemented have less tremble than the in situ concrete ceilings and composite due to the thickness of the ceiling blocks. But this is a general issue and it varies in different circumstances and conditions. For example, the vibration of the composite ceilings will be much less in the cases of underpinning both of the primary and secondary beams during concreting. The tremble of ceilings with old style blocks I mean Concrete masonry unit (concrete zigzag slab) and Composite steel concrete precast beams is also less than others of this kind Because of the underpinning during execution Polymer Styrofoam is white in color, and moisture, heat and sound insulation which is produced in petrochemical plants. This material is available in very small volumetric volumes (1.04 to 1.09 g / cm3) in different gradation of tiny and big can be found in form of granules, sheets, and blocks of various sizes and thicknesses. Cutting it off with cutting machines or by hot wire is easy to do. In this study, the chromite and Styrofoam ceilings are examined and their advantages and disadvantages of them in concrete structures are investigated.
    Źródło:
    World Scientific News; 2017, 83; 119-129
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test bench for analyzing the lost foam process
    Autorzy:
    Kaczorowski, R.
    Just, P.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/383347.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting
    lost foam
    styrofoam patterns
    odlewanie
    tracona piana
    wzorzec styropianowy
    Opis:
    The current work presents and describes the test bench for analyzing the lost foam process, especially measuring of the pressure of gases in the gas gap and continuous measuring of the rate of rise of the bath level when pouring the liquid metal into the mould. A series of preliminary research was carried out on the bench which was aimed at determining the influence of the basic parameters of the process, i.e. the density of the styrofoam pattern, thickness of the refractory coating applied on the pattern, kind of the alloy and the temperature of pouring on the mould cavity by the liquid metal and the pressure of gases in the gas gap.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1; 57-62
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biodegradation of expanded polystyrene (EPS) (Styrofoam) block as feedstock to Tribolium castaneum (Red Flour Beetle) imago: A promising plastic-degrading process
    Autorzy:
    Fabreag, Mark Angelo C.
    Familara, Joanne A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076717.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Biodegradation
    Expanded Polystyrene (EPS) (Styrofoam) Block
    Feedstock
    Ingestion
    Tribolium castaneum (Red Flour Beetle)
    Opis:
    The study was conducted to determine the biodegradation of Expanded Polystyrene (EPS) (Styrofoam) Blocks as feedstock to Tribolium castaneum (Red Flour Beetle) Imago. Three-hundred-sixty (360) Tribolium castaneum (Red Flour Beetle) Imagos were collected and acclimatized for two days before being exposed to experimentation. Incubation boxes were made using plywood. Three set-ups were prepared, with 30 Tribolium castaneum (Red Flour Beetle) each. Seven (7) grams of Styrofoam Block were placed in Set-up 1, seven (7) grams of Styrofoam and seven (7) grams of Rice grain Bran in Set-up 2 and seven (7) grams of Rice grain Bran in Set-up 3 with three replications each. Mean percent mass loss of Styrofoam and Rice grain Bran, mean percent mass loss and survival rate of Tribolium castaneum (Red Flour Beetle) were measured at 5th, 10th, 15th and 20th day incubation periods. Maximum mean percent mass loss in the different set-ups was observed at the 10th, 15th and 20th incubation period, with loses of 7.14%, 10.71% and 10.71%, respectively. Meanwhile, maximum mean percent increased weight of Tribolim castaneum (Red Flour Beetle) was observed at the 10th day incubation period, with 13.51%, 44.44% and 37.93%, respectively. Microscopic observation, of a dark white smear on the gut of the specimen indicates that Tribolium castaneum (Red Flour Beetle) Imago really masticate and biodegrade the Expanded Polystyrene (EPS) (Styrofoam) blocks. The survival rate of Tribolium castaneum (Red Flour Beetle) in the diverse set-ups showed no significant difference. This implies that ingestion of Styrofoam Block had no lethal effects on the natural weight variation and health of the Tribolium castaneum (Red Flour Beetle). Hence, results indicate that Expanded Polystyrene (EPS) (Styrofoam) Block can be a feedstock for Tribolium castaneum (Red Flour Beetle).
    Źródło:
    World News of Natural Sciences; 2019, 24; 145-156
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recycling of styrofoam waste: synthesis, characterization and application of novel phenyl thiosemicarbazone surface
    Autorzy:
    Siyal, A.N.
    Memon, S.Q.
    Khuhawar, M.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/778991.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    recycling
    styrofoam
    functional polymer
    Pb(II) ion removal
    Phenyl thiosemicarbazone surface
    Factorial Design Approach
    Opis:
    An attempt has been made to recycle Styrofoam waste to a novel functional polymer, Phenyl thiosemicarbazone surface (PTS). Polystyrene (PS) obtained from Styrofoam waste was acetylated and then condensed to PTS by reacting it with 4-Phenyl-3-thiosemicarbazide ligand and characterized by FT-IR spectroscopy and elemental analysis. Synthesized PTS was applied successfully for the treatment of lead contaminated water by batch extraction method. Sorption variables were optimized (pH 8, adsorbent dose 53mg, initial Pb(II) ion concentration 10mgl-1 and agitation time 90min) by factorial design approach. Lead uptake by PTS was found much sensitive to the pH of Pb(II) ion solution. The maximum removal (99.61%) of Pb(II) ions was achieved at optimum conditions. The Langmuir and D-R isotherm study suggested the monolayer, favorable (RL=0.0001-0.01) and chemisorption (E=20.41š0.12kJmol-1) nature of the adsorption process. The sorption capacity of PTS was found to be 45.25š0.69mgg-1. The FT-IR spectroscopy study showed the involvement of nitrogen and sulphur of thiosemicarbazone moiety of PTS for the uptake of Pb(II) ions by fi ve membered chelate formation.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 4; 11-18
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identyfikacja modelu dynamiki procesu spieniania polistyrenu
    Dynamics model identification of polystyrene expanding process
    Autorzy:
    Łukasik, M.
    Emirsajłow, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/157320.pdf
    Data publikacji:
    2011
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    polistyren spienialny
    EPS
    model Wienera
    opóźnienie transportowe
    identyfikacja
    styropian
    expanded polistyrene
    Wiener model
    transport delay
    styrofoam
    identification
    Opis:
    W artykule omówiono zagadnienie modelowania procesu spieniania polistyrenu w potokowym węźle spieniania. Część wstępna zawiera wprowadzenie do problematyki procesu spieniania polistyrenu. W dalszej części omówiono metodę pomiaru gęstości spienionego polistyrenu, a zebrane dane pomiarowe wykorzystano do opisu matematycznego procesu z pomocą modelu Wienera oraz identyfikacji opóźnienia transportowego obiektu.
    The paper presents the problem of blowing the expandable polystyrene in a continuous pre-expander. The first part of the paper introduces the problem and describes all physical phenomena involved in the expanding of raw polystyrene beads and in particular it explains the way the continuous pre-expander operates. The next part presents the method for measuring the expanded polystyrene density (system output) which uses a dedicated automatic weighing system. This weighing system has been installed in a real-life plant manufacturing the polystyrene foam at the industrial scale. It allows collecting the measurement data to identify the transportation delay in the process. The influence of the pre-expander chamber volume on the delay is examined. In the main part of the paper the dynamics of the polystyrene expanding process is identified. For this purpose the Wiener model containing an input linear dynamical part and output static nonlinearity is used. Computations are performed by means of the System Identification Toolbox of Matlab. The obtained model reasonably agrees with the real process data.
    Źródło:
    Pomiary Automatyka Kontrola; 2011, R. 57, nr 3, 3; 257-260
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technologia wykonywania budynków jednorodzinnych przy użyciu pustaków styropianowych
    Technology of building detached houses with use of hollow Styrofoam blocks
    Autorzy:
    Helbrych, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2068042.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Częstochowska
    Tematy:
    budynek jednorodzinny
    materiał budowlany
    pustak styropianowy
    przegroda budowlana
    przegroda zewnętrzna
    izolacyjność cieplna
    detached house
    building material
    styrofoam block
    building partition
    building envelope
    thermal insulation
    Opis:
    W artykule omówiono technologie wykonywania budynków jednorodzinnych przy użyciu pustaków styropianowych, zasady wykonywania przegród budowlanych oraz nowe technologie dotyczące tego typu materiałów budowlanych. Przedstawiono zalety i wady domów jednorodzinnych wykonanych z pustaków styropianowych. Poruszono również problem izolacyjności cieplnej przegród budowlanych wykonanych w tej technologii w odniesieniu do obowiązujących przepisów prawnych.
    The article discusses the technology of building detached houses with use of hollow styrofoam blocks, rules for the building envelope, and new technologies for this type of building materials. It also presents the advantages and disadvantages of detached houses made of Styrofoam blocks. Also raised the problem of thermal insulation of building partitions made in this technology, in relation to the effective legislation.
    Źródło:
    Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2014, 20 (170); 73--80
    0860-7214
    Pojawia się w:
    Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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