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    Tytuł:
    The properties of silicate products modified by LDPE granules
    Właściwości użytkowe wyrobów silikatowych modyfikowanych granulatem LDPE
    Autorzy:
    Jasińska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/402108.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
    Tematy:
    sand-lime products
    silicates
    masonry elements
    polyethylene LDPE
    recycling
    compressive strength
    density
    absorption
    modification
    experiments
    lightweight fillers
    wyroby wapienno-piaskowe
    silikaty
    elementy murowe
    polietylen LDPE
    recykling
    wytrzymałość na ściskanie
    gęstość
    absorpcja
    modyfikacja
    eksperymenty
    lekkie wypełniacze
    Opis:
    The following article presents the results obtained through the modification of sand-lime matter. The modifying filler is a low-density polyethylene granules (hereinafter referred to as LDPE), formed as a result of the recycling process. The main purpose of the research was to receive a lightweight, recyclable product with physical and mechanical properties similar to above mentioned traditional sand-lime products. The filler has given the desired effect, however the compressive strength of newly created elements has significantly decreased. It is therefore concluded that from the building operation point of view, modified products that contain less than 9% of LDPE filter are relevant. The paper describes the examination methodology and the results in the form of tables and graphs.
    Źródło:
    Structure and Environment; 2013, 5, 3; 11-14
    2081-1500
    Pojawia się w:
    Structure and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wybranych domieszek obniżających gęstość na parametry zaczynu cementowego
    The effect of selected density-reducing admixtures on cement slurry parameters
    Autorzy:
    Kremieniewski, Marcin
    Kędzierski, Miłosz
    Powiązania:
    https://bibliotekanauki.pl/articles/1834228.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Nafty i Gazu - Państwowy Instytut Badawczy
    Tematy:
    zaczyn cementowy
    gęstość zaczynu
    domieszki lekkie
    mikrosfera
    perlit
    czas wiązania
    wytrzymałość na ściskanie
    wypełniacze
    cement slurry
    cement slurry density
    lightweight admixtures
    microsphere
    perlite
    setting time
    compressive strength
    fillers
    Opis:
    Lightweight slurries are most commonly used for sealing columns of casing pipes in conditions of reduced reservoir pressure or in low-density zones. Through appropriate reduction of the cement slurry density, the hydrostatic pressure can be lowered, which prevents the cement slurry from escaping into the weakly compacted zones. In addition, cement slurries with reduced density can be used when it is necessary to raise cement in annulus to a large height (deep boreholes). When developing a lightweight cement slurry formula, light additives and admixtures are commonly used as fillers. These measures make it possible to reduce the slurry density and thus to apply it in specific geological conditions. However, the use of such additives and admixtures has a significant impact on the technological parameters of both fresh and hardened cement stone. In the case of fresh cement slurry, the presence of light fractions changes the rheological parameters of the leaven, increases filtration, and changes the water loss value. On the other hand, the cement bond resulting from lightweight slurry may have lower compressive strength values or higher porosity. It should be noted that lightweight slurry formulas are most often used to seal columns of casing pipes installed at small depths. Therefore, it is also important to obtain a proper transition time from the initial setting time to the final setting time. The above contributes to eliminating the possibility of gas migration pathways in the set cement slurry. In connection with the above, the publication discusses the impact of selected density-reducing admixtures on selected technological parameters of cement slurry. In the article, 4 types of fillers were tested (aluminosilicate microsphere used so far, new generation aluminosilicate microsphere CSF K, glass microsphere and filter perlite E100F). Initial tests were carried out for base cement slurries consisting only of water and cement. Lightweight fillers were used as a 5% grout admixture. At this stage, the setting time of fresh cement slurry and the effect of these admixtures on the obtained values of mechanical parameters were tested. In the next stage, tests were carried out for specific cement slurry, which contained other means necessary to control the parameters determining the effectiveness of sealing the borehole. In these recipes, 15% of the addition of selected lightweight fillers was used and the effect of these filling materials on the parameters of fresh and hardened cement slurries was determined.
    Źródło:
    Nafta-Gaz; 2020, 76, 3; 143-153
    0867-8871
    Pojawia się w:
    Nafta-Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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