鉱物結晶学の多様化:新たな広がりと挑戦  4.都市鉱物(材料科学)セメントクリンカー鉱物の結晶化学と間隙液相の結晶分化作用

書誌事項

タイトル別名
  • Crystal Chemistry of Cement-Clinker Minerals and Melt Differentiation Reaction of Interstitial Melt
  • セメントクリンカー鉱物の結晶化学と間隙液相の結晶分化作用
  • セメントクリンカー コウブツ ノ ケッショウ カガク ト カンゲキ エキソウ ノ ケッショウ ブンカ サヨウ

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説明

Microtextures of belite induced by polymorphic phase transitions and a remelting reaction have been reviewed, together with the melt differentiation reaction of interstitial melt. In the α-to-α'H phase transition, the α'H-phase nucleates as lamellae within the parent α-phase so as to realize a good lattice matching across the interface. The remelting reaction, in which the α-phase belite decomposes into a liquid and the α'H-phase during cooling, is necessarily preceded by the α-to-α'H phase transition. The lamella boundaries provide heterogeneous nucleation sites for the exsolving liquid. A variety of microtextures results depending on the surface tension between belite lamellae and exsolved liquid as well as on the cooling rate. As the simultaneous crystallization of zoned ferrite and belite proceeds during the cooling process of clinkers, the coexisting melt progressively increases the Al2O3/Fe2O3 ratio. After the termination of the ferrite crystallization, the aluminete and belite crystallize out of the differentiated melt.

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