Doubly Curved Tiles

The  Central Building Research Institute has developed a technology for manufacture of doubly curved tiles using Timber, hessian cloth, cement, sand, stone aggregate as raw material. 

These tiles can be used for durable and economical roofing system for low cost houses. 

The doubly curved tiles are made by spreading cement concrete (M:15) on hessian cloth stretched over a wooden frame. It is later lifted and the cloth allowed to sag to provide funicular (doubly curved) shape to the mass. This forms the tiles on setting. This tile acts as support for casting of further tiles. 

These tiles are extensively used in low cost houses.  The process of maufacturing tiles is very economical and 200 tiles can be produced per day.

Equipment needed to produce doubly curved tiles, wooden moulds. 

Source : Council of Scientific & Industrial Research