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  <doc>
    <id>35678</id>
    <completedYear/>
    <publishedYear>2008</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>126</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>other</type>
    <publisherName>Bundesanstalt für Materialforschung und -prüfung (BAM)</publisherName>
    <publisherPlace>Berlin</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
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    <title language="eng">Effect of air pollutants on renderings and moisture-transport phenomena in masonry</title>
    <abstract language="eng">Determining a pore structure’s mechanical and chemical data on lime rendering exposed&#13;
outdoors and including masonry in the laboratory, with regard to their behaviour on moisture&#13;
transport and weathering was the objective. In search of clues for a dose-response relation -&#13;
i.e. upon a connection between the emission rate of SO2 and NOx on one hand and the degree&#13;
of damage to mainly plaster having a lime component on the other - it has been of interest to&#13;
what extent their structural characteristics including pore space are modified and so&#13;
consequently also physico-technical properties and chemical composition. For determining&#13;
corresponding criteria, a widely diversified spectrum of test methods such as to obtain data&#13;
concerning porosity and moisture transport, mechanical behaviour, and chemistry as well is&#13;
available. A description of the manufacture of plate-shaped rendering specimens with lime&#13;
putty, industrially hydrated lime and dolomitic hydrate (the last two also having a cement&#13;
admixture) and also hydraulic lime as binding agents is included. First deposition velocity and&#13;
absorption rate for SO2 were determined in laboratory tests on these materials in dry and&#13;
moist states. After their exposure on outdoor racks at six locations in the Berlin region with&#13;
differing SO2 atmospheric contents over at least 5 years, the samples of course show timedependent&#13;
modifications of chemical and physical qualities which are especially reflected in&#13;
the form of profiles of structure, strength and concentration, e.g. for sulphate. Local climatic&#13;
differences, however, partly exert a greater influence on material than emissions. Similar&#13;
investigations were performed on samples of comparable composition exposed 4 and 17&#13;
years. But the real surprise is furnished by the renderings’ behaviour depending upon&#13;
orientation and upon height at a building. Since weathering behaviour and moisture transport&#13;
(absorption, storage, release) are directly interdependent, further criteria are necessary for a&#13;
critical assessment of a plasters’ pore structure. Starting from sands, plasters were&#13;
characterized. The structural parameters were lastly influenced by the respective contents of&#13;
sand, binder and mixing water. These results and those gained from bricks naturally find their&#13;
expression in masonry sections manufactured there from, and above all in their capillary and&#13;
evaporative behaviours, and also when applying different test liquids. Summary and cited&#13;
literature is given at the end of this report.</abstract>
    <identifier type="urn">urn:nbn:de:kobv:b43-356780</identifier>
    <licence>Allgemeines Deutsches Urheberrecht</licence>
    <author>Dirk Hoffmann</author>
    <author>Konrad Niesel</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Building Material</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Mercury Intrusion Porosimetry</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Gas Adsorption</value>
    </subject>
    <collection role="ddc" number="628">Sanitär- und Kommunaltechnik; Umwelttechnik</collection>
    <collection role="literaturgattung" number="">Eigenverlag BAM</collection>
    <collection role="fulltextaccess" number="">Datei für die Öffentlichkeit verfügbar ("Open Access")</collection>
    <collection role="unnumberedseries" number="">Arbeitspapiere der BAM</collection>
    <thesisPublisher>Bundesanstalt für Materialforschung und -prüfung (BAM)</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-bam/files/35678/Effect of air pollutants on renderings and moisture-transport phenomena in masonry.pdf</file>
  </doc>
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