Magnani process

Other types of production processes are also dependent on the special nature of the fresh mix, which is controlled by the special properties of the asbestos fibres. The Magnani process is based on direct deposition of slurry on a porous former, followed by dewatering and consolidation by vacuuming and pressure. The product can be produced by the build-up of several layers. 

Figure 11.6 Typical stress—strain curves in flexure of composites produced by the Magnani process, comparing the behaviour of asbestos and cellulose FRC composites (after Fordos and Tram [20]).

Among several production methods the most commonly used were the so-called Hatschek, Magnani and Manville processes. The asbestos fibre cement elements were also produced by shotcreting. More details on the production methods may be found, among other sources, in Hannant (1978) and in Bentur and Mindess (1990). 

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