1.1 本试验方法提供了使用索氏提取器对水可提取氯化物骨料进行取样和分析的程序。 注1: 当在骨料、混凝土或砂浆中发现氯化物含量显著高时，使用本试验方法。 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。 1.4 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 当存在足量的水可提取氯化物时，有可能引发或加速嵌入或接触水泥基系统（如砂浆、水泥浆或混凝土）的金属（如钢）的腐蚀。当骨料含有高背景天然氯化物时，本试验方法适用（见ACI 222.1–96）。试验方法 C1152/C1152M 测定酸溶性氯化物和试验方法 C1218/C1218M 测定水溶性氯化物。两种试验方法 C1152/C1152M 和 C1218/C1218M 将样品粉碎成细粉末或细颗粒材料。索氏方法旨在使用非粉末材料。一些骨料的结果表明，索氏法提取的氯化物含量极低，大部分残留在岩石中，因此不可用于腐蚀。 4.2 索氏提取装置由三部分组成:沸腾烧瓶，在试验开始时含有试剂水；提取器，其在套管内包含样品；以及冷凝器。提取器的作用是将水煮沸，然后冷凝并滴到样品上。当水达到样品上方的固定高度时，提取器将水从套管虹吸回沸腾烧瓶。该过程会重复进行，直到测试终止。（参见 图1 .) 图1 索氏提取装置

1.1 This test method provides procedures for sampling and analysis of aggregate for water-extractable chloride using a Soxhlet extractor. Note 1: This test method is to be used when significantly high chloride content has been found in aggregates, concretes, or mortars. 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 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. 1.4 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 Water-extractable chloride, when present in sufficient amount, has a potential to initiate or accelerate corrosion of metals, such as steel, embedded in or contacting a cementitious system, such as mortar, grout, or concrete. This test method is applicable when aggregates contain a high background of naturally occurring chloride (see ACI 222.1–96 ). Test Method C1152/C1152M determines acid-soluble chloride and Test Method C1218/C1218M determines water-soluble chloride. Both Test Methods C1152/C1152M and C1218/C1218M pulverize the sample to a fine powder or fine granular material. The Soxhlet method is intended to use nonpulverized material. Results with some aggregates have shown that the Soxhlet procedure extracts an extremely low amount of chloride, with most of it remaining in the rock, and therefore, it is not available for corrosion. 4.2 The Soxhlet extraction apparatus consists of three sections: the boiling flask, which contains reagent water at the beginning of the test; the extractor, which contains the sample inside a thimble; and, the condenser. The extractor functions by boiling the water, which condenses and drips on to the sample. When the water attains a fixed height above the sample, the extractor siphons the water from the thimble back to the boiling flask. The process repeats itself until the test is terminated. (Refer to Fig. 1 .) FIG. 1 Soxhlet Extraction Apparatus