过烧氧化镁的水化及其对混凝土自生体积变形的景响

本文介绍了MgO的生成条件对其晶格常数、内比表面积和水化速度的影响 ;说明随着煅烧温度的提高及煅烧时间的延长 ,MgO的晶格变小、内比表面积降低 ,MgO的水化速度下降、水化的固相体积增大。文章论述了水泥中MgO的水化行为及影响外掺MgO混凝土的自生体积变形的因素 ,并对混凝土外掺MgO的掺量提出了建议

Hydration of excessively combusted magnesium oxide and its influence on autogenous volume change of concrete

The production of magnesium oxide influences on its lattice constant, inside specific surface area and rate of hydration are introduced in this paper. The less crystal lattice, less inside specific surface area, less rate of hydration and bigger hydrated solid volume appear in the train of the higher combustion temperature or longer combustion time of magnesium oxide. The hydration of magnesium oxide in cement and the factors of influence on autogenous volume change of concrete with magnesium oxide are discussed. The limit content of magnesium oxide in concrete is suggested.