| 摘要 |
The cullet bulk density is reduced to a value of 1100 kg/m<3> The generated foam is a surfacent foam to which a stabiliser is added containing silicic acid. The silicic acid is based especially on water glass or aqueous silicic acid oil base. The brick (1) is machined after the baking on all six sides (2,4,5,6,7) has eroded the material. The brick is manufactured form a fine clay with a grain size of less than 1 mm. The sludge mass is added to with fibrous substances such as cellulose fibre, synthetic fibre from the paper making process, glass or mineral fibre or animal hair during the production process. The brick has a heat conductivity of less than 0.18 W/mK, 0.14 W/mK or 0.09 W/mK.
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