|Building with Pumice (GTZ, 1990, 86 p.)|
|2. General Information on Pumice|
Pumice has excellent properties. As a building material it is
Figure 8: Pumice extraction
- very light,
- resistant to pests,
- easy to work with,
- temperature-balancing (Figs. 9, 10 and 11).
But then, it also has some negative properties like:
- the lower compressive strength of pumice concrete, as compared to concrete containing other, heavier aggregates;
- the tendency of its edges and corners to break off more easily than those of heavy concrete'
- its lack of frost resistance when wet.
Consequently, pumice building material should not be used for:
- components with constant exposure to water, e.g. in showers,
- components subject to heavy traffic, e.g. stair treads and floor tiles.