| Abstract: | Clay foam is a ceramic material, produced by the firing of a raw clay, invented by the French Technical Centre for Tiles and Bricks, in Paris. Unlike ordinary ceramic materials, the porosity of clay foam is achieved in the first stage of production through the foaming of clay slip. This foam is then dried and fired, yielding a strong, rigid and porous material affording remarkable possibilities for colours and reliefs. So far, qualities which have been in demand are primarily those of appearance, sound absorption and durability, for example for sound‐absorbent screens for motorways and railways, and for sound‐absorbent internal surfacings for swimming‐pools, gymnasia and offices. |
