矿物功能材料的Cl-结合能力

Binding Capability of Mineral Functional Materials with Chloride Ion

关键词:  矿物功能材料  Cl^-  高性能混凝土  固化  水化产物  物理吸附  比表面积  二次水  表面结构  化学组成

Key words:  mineral functional materials,chloride ion,initial binding,binding capability,concrete

摘要:

测试了几种典型矿物功能材料对Cl^-的初始固化力．研究表明：矿物功能材料对Cl^-有较强的初始固化力，且这种初始固化力主要归因于它们对Cl^-的物理吸附作用，其大小与材料的种类有关．进一步的研究发现，矿物功能材料对Cl^-的初始固化力并不仅仅取决于相应比表面积的大小，同时还与各矿物功能材料的化学组成、表面结构、表面电特性及微孔特性等有关．正是由于矿物功能材料对Cl^-的初始物理吸附和中、后期二次水化产物对Cl^-的化学固化，从而使得高性能混凝土具有较强的Cl^-结合能力。

Abstract:

The chloride ion binding capability of typical mineral functional materials were tested. The results indicate that because of physical adsorption of chloride ion, mineral functional materials have much stronger initial chloride ion binding capability, and the value is dependent on variety of the materials. It is found that initial chloride ion binding capability of mineral functional materials not only depends on their specific surface, but also relates to chemical composition, surface structure, surface electrical characteristic and micro-pore characteristic etc. The factors which affect stronger initial chloride ion binding capability in high performance concrete are discovered to be mineral functional material's initial chloride ion binding and after-hydrate's chemical binding to chloride ion in middle and late stages.