[arcseco]

I've run into Siporex panels, which are a type of low density concrete per-fabricated panels. When these panels become water logged their tensile strength drops off quite a bit more than conventional concrete panels. The climate in which these panels are to be used probably plays a significant factor in specifying their use.

[vram22]

IIRC there was/is a company in Pune, India, called B G Shirke and company, that is into prefab Siporex materials.

Google "shirke siporex".