摘要
在原理分析可行的基础上,以同一试件分别采用ASTMC1202法和NEL法对高强混凝土和普通混凝土进行了氯离子渗透性对比试验研究,这样可以消除不同试件对比所产生的离散误差。原理分析和试验结果证实了:先进行电通量测试对于随后进行的NEL法测试影响小,可以忽略。从而确定了在同一试件对比试验中,应当首先进行电通量测试然后再进行NEL法渗透试验。用同一试件消除离散误差的措施,为两种渗透指标之间建立科学的关系打下基础。初步试验结果表明:低水胶比高性能混凝土两种渗透指标(即氯离子扩散系数和电通量)的离散性比较小,容易确定两种指标之间的定量关系;而高水胶比普通混凝土的两个指标之间的离散性很大,很难为二者确定同样的定量关系。
Based on the feasibility analysis of principle,contrast test of chloride ion permeability of high strength concrete and normal concrete with the same specimen are investigated by using ASTM C1202 and NEL test method respectively. So the data discretization due to different specimens can be canceled. It is testified from principle analysis and a series of test that the influence of the former ASTM C1202 test on the latter NEL test results can be neglected,which provides a feasibility to establish a correct relationship between electric flux and diffusion coefficient without error from discretization. It is showed that,by the comparison study with same specimen,test of ASTM C1202 should be carried out firstly and then followed the NEL one. The test results show that the discreteness of the data of electric flux and Cl^- diffusion coefficient is small for high performance concrete with low water-gel ratio, which means that it is easy to determine the quantify relationship between them. And meanwhile, there is more discretization in normal strength concrete with high water-gel ratio, so it is difficulty to find a same relationship between them.
出处
《混凝土》
CAS
CSCD
北大核心
2007年第3期4-6,10,共4页
Concrete
基金
国家自然科学基金(50478077)
