Electrical Resistance to Monitor Carbonation and Chloride Ingress
Electrical Resistance to Monitor Carbonation and Chloride Ingress
复制标题
用于监测碳化和氯化物进入的电阻
DOI：
10.14359/51716834
复制
发表时间：
2019-09
影响因子：
1.7
通讯作者：
Basheer P A Muhammed
中科院分区：
文献类型：
--
作者：
Wang Yaocheng;Nanukuttan Sreejith;Bai Yun;Yang Kai;Basheer P A Muhammed
混凝土的电阻（R）对水化水泥浆体的化学相和物理结构、含水量以及混凝土的物理结构的变化很敏感。因此，R受到碳酸化和氯化物进入的影响。然而，在一个结构受到碳酸化和氯化物的组合，其中有复杂的变化，水化产物的物理和化学特性，使用电阻测量来评估混凝土的耐久性仍然是有限的。在这项调查中，四种不同的组合的二氧化碳和氯化物暴露制度被用来检查电阻，碳酸化程度，和氯化物的量（或氯化物含量）之间的关系。已经发现，对于具有稳定的相对湿度的混凝土，在独立的氯化物暴露制度和组合的氯化物和碳酸化制度中，电阻对水泥水化和氯化物含量的变化敏感。然而，对于3个月的加速碳酸化测试方案，电阻和碳酸化程度之间的关系并不那么明显。
Electrical resistance (R) of concrete is sensitive to changes in the chemical phases and physical structure of hydrated cement paste, moisture content, and the physical structure of concrete. Therefore, R is influenced by both carbonation and chloride ingress. However, in a structure subjected to a combination of carbonation and chlorides, in which there are complex changes to both physical and chemical characteristics of hydration products, the use of electrical resistance measurements to assess the durability of concrete is still limited. In this investigation, four different combinations of carbon dioxide and chloride exposure regimes were used to examine the relationship between the electrical resistance, degree of carbonation, and quantity of chlorides (or chloride content). It has been found that for concretes with a stabilized relative humidity, the electrical resistance is sensitive to cement hydration and variations in chloride content in both independent chloride exposure regime and combined chloride and carbonation regime. However, the relationship between electrical resistance and the degree of carbonation is not that pronounced for accelerated carbonation test regime for 3 months.