• This is an experimental unit, developed by Prof. Roberto Mattone and Gloria Pasero at the Turin Polytechnic, Italy.
• The conoid unit has a shape which makes it suitable for use as roofing as well as wall components.
• The aim was to produce a strong, versatile component from gypsum and sisal (which are abundantly available in some regions), using simple formwork and equipment.
• Laboratory tests showed a good strength to weight performance, since the fibres have high tensile strength and bond well with the gypsum. Furthermore, resistance to fire and biological attack is good.
• The main drawback is the solubility of gypsum in water, which calls for a completely waterproof surface protection.
Further information: Prof. Roberto Mattone, Facolta di Architettura, Politecnico di Torino,
Viale Mattioli 39, Torino 10125, Italy; Bibl. 23.15.
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