碱激发材料氯离子传输性能测试方法及影响因素研究进展

发布时间：2018-04-16 01:20

本文选题：碱激发材料 + 氯离子　；参考：《材料导报》2017年15期

【摘要】：水泥基材料中氯离子的传输是一个非常复杂的过程。在介绍水泥基材料氯离子传输机理及常用试验方法的基础上,综述了碱激发材料氯离子传输性能测试方法及影响因素。碱激发材料氯离子传输性能受激发剂种类的影响,改变矿渣掺量、碱掺量和水玻璃模数能不同程度地改变体系的氯离子传输性能。快速氯离子渗透试验结果受孔溶液化学组成影响,碱激发材料孔溶液碱性高、化学组成更复杂,孔溶液影响更显著,所以该方法不适用于评价碱激发材料氯离子传输性能。自然扩散试验因时间长而不常用。非稳态电迁移试验是目前快速测试水泥基材料中氯离子传输性能最好的方法,但由于碱激发材料与普通水泥基材料的碱度不同,其变色边界氯离子浓度也会不同,将该方法用于评价碱激发材料时,还需进一步研究测试样品的准备和硝酸银变色边界氯离子浓度。
[Abstract]:The transport of chloride ions in cement-based materials is a very complicated process.Based on the introduction of chloride ion transport mechanism and common test methods of cement based materials, the testing methods and influencing factors of chloride ion transport properties of alkali excited materials are summarized.The chloride ion transport property of alkali excited material is affected by the type of activator. Changing the content of slag, alkali content and water glass modulus can change the chloride ion transport property of the system to some extent.The results of rapid chloride ion permeation test are influenced by the chemical composition of pore solution. The alkalinity of alkali excited material is high, the chemical composition is more complex, and the influence of pore solution is more significant. Therefore, this method is not suitable for evaluating the chloride ion transport performance of alkali excited material.The natural diffusion test is not commonly used because of its long time.The unsteady state electromigration test is the best method for rapid measurement of chloride transport performance in cement based materials. However, due to the different alkalinity between alkali excited materials and ordinary cement based materials, the color change boundary chlorine ion concentration will also be different.It is also necessary to study the preparation of test samples and the concentration of chlorine ions at the boundary of silver nitrate discoloration when the method is applied to evaluate alkali excitation materials.
【作者单位】：湖南大学土木工程学院;湖南工业大学土木工程学院;
【基金】：国家自然科学基金(51638008;51461135001)
【分类号】：TQ172.1

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