シラス ノ コウギョウテキ リヨウ ニ カンスル ケンキュウ (ダイ8ホウ) : シラス オ ゲンリョウ トスル ハクショク タイル ソジ

A little amount of white cement, kaolin and wollastnite is added to magnetic separated and selected SHIRASU, the mixture then press moulded and fired in the electric furnace. Physical and thermal Properties and bending strength of those fired bodies were investigated. The properties of SHIRASU-white cement-kaolin system or SHIRASU-white cement-wollastnite system fired at 1150 to 1200°C are as follows, apparent gravity 2.3~2.7, bulk gravity 1.8~2.0, water absorption 0~17(%), bending strength 80~500kg/cm^2, and thermal expansion coefficient is found in the following region "5.6~5.8×10^{-6}". The whiteness of the tile bodies SHIRASU is 90(%), near the pure white, so that colouring is good and can be expected the reduction of pigment consumption