非石綿繊維強化セメント系建材の微細組織と耐凍害性

概要

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Damage of several commercial cement boards and laboratory-made samples by ASTM (C-666 A) test and unidirectional freeze-thaw (named as "N-method") test methods was compared, and factors which enhance the frost durability of non-asbestos fiber reinforced cement boards were identified. They are (1) suppression of water absorption, (2) reduction of intra-void in a fiber bandle, (3) elimination of structural defects such as lamination coming from the board-forming processing, and (4) addition of proper amount of silicious fine aggregates. Several technological advantages of the "N-method" coupled with measurement of residual linear expansion as the frost evaluation factor were presented from the comparison of freeze-thaw test results between above two methods.
社団法人日本セラミックス協会の論文
1992-06-01