ビーライトの結晶化学における最近の進歩 : 相転移により結晶内部に形成される微細組織と再融反応を利用した水和反応性の改善

概要

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The microtextures of belite induced by a remelting reaction and other transformations (e.g., the polymorphic phase transitions of α→α′→β) have been reviewed. The remelting reaction, in which the α-phase belite decomposes into a liquid and the α′-phase during cooling, is necessarily preceded by the phase transition of α→α′; the α′-phase uncleates as lamellae within the parent α-phase so that there is good lattice matching across the interface. The resulting lamella boundaries provide heterogeneous nucleation sites for the exsolving liquid by the remelting reaction. A variety of microtextures results depending on the wettability of the belite lamellae by the exsolved liquid as well as on the cooling rate. The belite in which the remelting reaction occurred to a large extent showed higher hydration reactivity and better grindability than the quenched material. Recent years have seen developments in a new application for the remelting reaction that involves modifying belite-rich cement.
社団法人日本セラミックス協会の論文
2001-03-01