Change of carcinogenic chrysotile fibers in the asbestos cement
No fiber shape of original asbestos was preserved [16]. Positive tests were conducted also at 700 and 800 °C heating [17], [18]. The asbestos cement slates with 18 wt.% chrysotile were converted into perfectly non-asbestos products by thermal treatment in a water vapor atmosphere at 800 °C for 2 h [19].
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