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close this bookAsbestos Overview and Handling Recommendations (GTZ, 1996)
close this folderPart II. Asbestos
close this folder5. Occupational safety measures in handling Asbestos
View the document(introduction...)
View the document5.1 Suitable fiber binding
View the document5.2 Wet operations
View the document5.3 Enclosure
View the document5.4 Vacuuming of dust near the point of origin
View the document5.5 Limiting the areas in which Asbestos dust may arise
View the document5.6 Personal respiratory protection
View the document5.7 Regular and thorough cleaning of workplaces
View the document5.8 Dust-free waste collection and landfill disposal

5.2 Wet operations

In many cases the release of fibers can be reduced by technical measures in processing the materials, for instance, by using slow running saws, instead of the abrasive cutter typically used in the past.

A further reduction in the release of fibers during the processing of Asbestos containing materials is achieved through the use of so-called wet operations. The following techniques are representative:

1. The processing of wet mixtures on calenders and form presses in the manufacturing of Asbestos cement, gaskets, friction linings, grouting compounds and filters;

2. The cutting of wet materials, e.g for construction parts made of Asbestos cement;

3. Forming and other processing of Asbestos cement products while wet;

4. Interweaving of moist Asbestos yarn.

However, with all of these techniques it must be noted that after drying, the material remains on the processing tools tend to release more fibers, and therefore special safety measures are needed during cleaning.