asbestos cement weathered

• 

  Understanding Asbestos Cement Products | Risk Assessment, …

  Asbestos cement products will generally contain between 10%-15% chrysotile (white) asbestos but have been found to contain well over 50%, particularly when weathered. Asbestos cement products that have been produced between 1945 and 1980 may also contain an amount of Crocidolite (blue) and Amosite (Brown) asbestos fibres.

  view more
• 

  Releasability of asbestos fibers from weathered roof cement.

  201861 · Europe PMC is an archive of life sciences journal literature.

  view more
• 

  Fibroseal Primer – Crommelin

  Crommelin Fibroseal® Primer is a water based penetrating treatment for weathered asbestos cement sheeting. Fibroseal® Primer soaks through degraded asbestos to sound base material, binding these unstable elements. Fibroseal® Primer is then over-coated with Crommelin Fibroseal® Topcoat. The Fibroseal® System is a weathered asbestos …

  view more
• 

  [Fiber emissions from weathered asbestos cement products.

  Europe PMC is an archive of life sciences journal literature. It could be already shown that fibrous particulates can be emitted from weathered and corroded surfaces of asbestos-cement-(AC)-products and that these fibers increase the total ambient air concentration after having been dispersed in the atmosphere.

  view more
• 

  Releasability of asbestos fibers from weathered roof cement

  Roof cement contains an asphalt binder, volatile solvent, and non-fibrous additives. It was made with asbestos fibers by at least one manufacturer until 2004.[1] Asbestos fibers were added to roofi...

  view more
• 

  L’erosione delle coperture in cemento amianto: …

  20121227 · «The corrosion of asbestos cement roofs: an important source of environmental pollu­tion».A microscopic investigation on samples of asbestos cement roofs weathered from 2 months to 15 years or more was ,carried out. Surface alterations begin as early as 2 months, are well visible after a few years and become very severe after 5-10 …

  view more
• 

  (PDF) Mapping of Asbestos Cement Roofs and Their …

  201561 · The aims of this study were: (i) the mapping of asbestos cement roofs in an urban area; and (ii) the development of a spectral index related to the roof weathering status. Aerial images were ...

  view more
• 

  Lichens on asbestos–cement roofs: Bioweathering and

  2009315 · Biocovering and bioweathering effects of lichen colonization coexist on asbestos–cement roofs. Differing from the public opinion, lichen cover exerts a positive action in limiting the detach of asbestos from the carbonatic matrix and its loss and consequent dispersion in the environment. Moreover, lichens, by physically contacting the …

  view more
• 

  Asbestos cement products – A low risk material?

  2023116 · Asbestos cement products will generally contain between 10%-15% chrysotile (white) asbestos but have been found to contain well over 50%, particularly when weathered. Asbestos cement products that have been produced between 1945 and 1980 may also contain an amount of Crocidolite (blue) and Amosite (Brown) asbestos fibres.

  view more
• 

  IJGI | Free Full-Text | Mapping of Asbestos Cement Roofs …

  201561 · The aims of this study were: (i) the mapping of asbestos cement roofs in an urban area; and (ii) the development of a spectral index related to the roof weathering status. Aerial images were collected through the Multispectral Infrared and Visible Imaging Spectrometer (MIVIS) sensor, which acquires data in 102 channels from the visible to the …

  view more