1.1 本试验方法包括测定混凝土的电导率，以快速指示其抗氯离子渗透性。本试验方法适用于在本试验程序和长期氯化物积水程序（如AASHTO T中所述）之间建立了相关性的混凝土类型 参考文献中讨论了此类相关性的示例 ( 1- 5. ). 2. 1.2 以国际单位制表示的数值应视为标准值。 本标准不包括其他计量单位。 1.3 本标准的文本引用了提供解释材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本试验方法涵盖了混凝土样品电导率的实验室评估，以快速指示其抗氯离子渗透性。 在大多数情况下，电导结果与氯化物积水试验（如AASHTO T259）具有良好的相关性，这些试验是在相同混凝土混合物浇铸的配对板上进行的（参考文献 1- 5. ). 4.2 本试验方法适用于出于设计目的和研发目的评估材料和材料比例。 4.3 根据混凝土类型和养护程序，样本龄期对试验结果有显著影响。大多数混凝土如果适当养护，随着时间的推移，渗透性会逐渐显著降低。 4.4 该测试方法最初是为评估替代材料而开发的，但在实践中，其使用已演变为质量控制和验收测试等应用。混凝土混合物中使用的配料、养护试样的方法和持续时间等因素会影响本试验的结果（见 注1 ). 当该方法用于混合物鉴定和验收试验时，必须明确规定养护程序和试验时的龄期。 注1: 当使用本试验确定混凝土混合物的可接受性时，应在项目规范中说明资格预审或现场样品验收的统计标准和试验年龄。该测试的验收标准应考虑影响结果的可变性来源，并确保供应商和买方之间的风险平衡。应考虑结构投入使用前的预期暴露条件和时间。 Ref中讨论了建立标准的一种方法 ( 6. ) . 4.5 表X1.1 在里面 附录X1 提供本试验结果与混凝土氯离子渗透性之间的定性关系。 4.6 当在表面处理的混凝土上使用本试验时，应注意解释本试验的结果，例如，用渗透密封剂处理的混凝土。一些此类混凝土的试验结果表明，抗氯离子渗透性较低，而90 配对板上的日间氯离子积水试验表明具有更高的阻力。 4.7 试验方法的细节适用于100 mm标称直径试样。这包括实际直径为95的样本 毫米至100毫米。其他试样直径可通过适当改变外加电压电池设计进行测试（见 7.5 和 图1 ). 图1 外加电压电池（施工图） 4.7.1 对于直径大于95的试样 mm，必须按照中的程序调整通过的总电荷的测试结果值 11.2 . 直径小于95的试样 在涂覆和安装试样时必须特别小心，以确保导电溶液能够在试验期间接触整个端部区域。

1.1 This test method covers the determination of the electrical conductance of concrete to provide a rapid indication of its resistance to the penetration of chloride ions. This test method is applicable to types of concrete where correlations have been established between this test procedure and long-term chloride ponding procedures such as those described in AASHTO T 259. Examples of such correlations are discussed in Refs ( 1- 5 ). 2 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method covers the laboratory evaluation of the electrical conductance of concrete samples to provide a rapid indication of their resistance to chloride ion penetration. In most cases the electrical conductance results have shown good correlation with chloride ponding tests, such as AASHTO T259, on companion slabs cast from the same concrete mixtures (Refs 1- 5 ). 4.2 This test method is suitable for evaluation of materials and material proportions for design purposes and research and development. 4.3 Sample age has significant effects on the test results, depending on the type of concrete and the curing procedure. Most concretes, if properly cured, become progressively and significantly less permeable with time. 4.4 This test method was developed originally for evaluations of alternative materials, but in practice its use has evolved to applications such as quality control and acceptance testing. Factors such as ingredient materials used in concrete mixtures and the method and duration of curing test specimens affect the results of this test (see Note 1 ). When this method is used for mixture qualification and acceptance testing, it is imperative that the curing procedures and the age at time of testing be clearly specified. Note 1: When using this test for determining acceptability of concrete mixtures, statistically-based criteria and test age for prequalification, or for acceptance based on jobsite samples, should be stated in project specifications. Acceptance criteria for this test should consider the sources of variability affecting the results and ensure balanced risk between supplier and purchaser. The anticipated exposure conditions and time before a structure will be put into service should be considered. One approach to establishing criteria is discussed in Ref ( 6 ) . 4.5 Table X1.1 in Appendix X1 provides a qualitative relationship between the results of this test and the chloride ion penetrability of concrete. 4.6 Care should be taken in interpreting results of this test when it is used on surface-treated concretes, for example, concretes treated with penetrating sealers. The results from this test on some such concretes indicate low resistance to chloride ion penetration, while 90 day chloride ponding tests on companion slabs show a higher resistance. 4.7 The details of the test method apply to 100 mm nominal diameter specimens. This includes specimens with actual diameters ranging from 95 mm to 100 mm. Other specimen diameters may be tested with appropriate changes in the applied voltage cell design (see 7.5 and Fig. 1 ). FIG. 1 Applied Voltage Cell (Construction Drawing) 4.7.1 For specimen diameters other than 95 mm, the test result value for total charge passed must be adjusted following the procedure in 11.2 . For specimens with diameters less than 95 mm, particular care must be taken in coating and mounting the specimens to ensure that the conductive solutions are able to contact the entire end areas during the test.