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首页> 外文期刊>Building and Environment >Discoloration and fungal growth on three fiber cement formulations exposed in urban, rural and coastal zones
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Discoloration and fungal growth on three fiber cement formulations exposed in urban, rural and coastal zones

机译：在城市，农村和沿海地区暴露的三种纤维水泥配方的变色和真菌生长

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摘要

Three formulations of fiber cement were evaluated for fungal colonization and color change after five years of exposure in aging stations located in urban (S3o Paulo), rural (Pirassununga) and coastal (Rio Grande) zones in Brazil. The lowest color change and fungal colonization were registered in Rio Grande, which has a temperate climate, as opposed to Sao Paulo and Pirassununga, which are tropical. The highest fungal colonization was recorded in Sao Paulo, one of the most air polluted cities in Brazil. Pirassununga samples had an intermediate fungal colonization, in spite of showing the highest color change with visible dark spots on the surfaces. These spots were identified as cyanobacteria, which significantly contributed to the darkening of the specimens. The fiber cement formulation, varying in proportion of organic fibers such as poly (vinyl alcohol) and cellulose, was less significant for fungal bioreceptivity than the characteristics of the exposure site. The most frequent fungal genus found in the tropical climate, in both urban and rural zones, and the main one responsible for the higher records in Sao Paulo, was Scytalidium sp. which was registered for the first time on this building material in Brazil.
机译：在巴西城市（S3o Paulo），农村（Pirassununga）和沿海（Rio Grande）的老化站中暴露了五年后，评估了三种纤维水泥配方的真菌定植和颜色变化。与热带的圣保罗和皮拉苏松加相反，在气候温和的里奥格兰德注册的变色和真菌定植最少。在巴西，圣保罗是空气污染最严重的城市之一，真菌定植量最高。尽管表现出最高的颜色变化和表面可见的黑点，但Pirassununga样品仍具有中等的真菌定殖能力。这些斑点被确定为蓝细菌，这极大地导致了样品的变黑。纤维水泥配方的有机纤维（例如聚乙烯醇）和纤维素的比例各不相同，其真菌的生物接受性不如暴露部位的特征重要。 Scytalidium sp是在热带气候中在城市和农村地区最常见的真菌属，也是造成圣保罗较高记录的主要原因之一。在巴西首次使用该建筑材料进行了注册。

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  • 来源
    《Building and Environment》 |2011年第2期|p.324-330|共7页
  • 作者

    H.K. Tanaca; C.M.R. Dias; C.C. Gaylarde; V.M. John; MA Shirakawa;

  • 作者单位

    Instituto de Biociencias, Universidade de Sao Paulo, Sao Paulo, SP, CEP 05508-090, Brazil;

    Departamento de Engenharia de Construcdo Civil, Escola Politecnica da Universidade de Sao Paulo, Sao Paulo, SP, CEP 05508-900, Brazil;

    Microbiology Research Laboratory, St. Michael's Building, School of Pharmacy and Biomedical Sciences, University of Portsmouth, White Swan Road,Portsmouth PO1 2DT, United Kingdom;

    Departamento de Engenharia de Construcdo Civil, Escola Politecnica da Universidade de Sao Paulo, Sao Paulo, SP, CEP 05508-900, Brazil;

    Departamento de Engenharia de Construcdo Civil, Escola Politecnica da Universidade de Sao Paulo, Sao Paulo, SP, CEP 05508-900, Brazil;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber cement; natural aging; fungal colonization; cyanobacteria;

    机译：纤维水泥自然老化真菌定植蓝细菌;

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