| abstract |
A cement board has a density from 200 to 1000 kg/m 3 , the cement board produced from a foamed cement slurry including cement; water; from 0.01 to 5% of a water-reducing agent, a plasticizer or a superplasticizer, % by mass relative to the mass of cement; from 0.45 to 5%, of a foaming agent, % by mass relative to the mass of water; a water-soluble calcium salt; mineral particles from 0.1 to 300 μm in size; a ratio of foaming agent to calcium salt being from 0.3 to 0.8. |