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根据标准JGJ 52—2006《普通混凝土用砂、石质量及检验方法标准》的硝酸银标液滴定法测试氯离子含量时,前期烘干、浸泡耗时长达3～4小时,往往不能及时检测出砂的氯离子含量,从而影响搅拌站生产质量及效率。本文参考水工中的快速离子选择电极法并对此进行改进,使用高温电炉将砂子快速炒干,叶轮搅拌机快速搅拌均匀使砂子中的氯离子快速溶解,可快速检测砂中的氯离子含量,耗时缩短为30分钟左右,经验证,与硝酸银标液滴定法的检验结果基本一致。
According to standard JGJ 52-2006 “ordinary concrete sand, stone quality and test methods standard” silver nitrate titration test chloride ion content, pre-drying, soaking time-consuming up to 3 to 4 hours, often can not be detected in time Sand chloride ion content, thus affecting the mixing plant production quality and efficiency. This paper refers to the rapid selection of hydraulic ion selective electrode method and to improve this, the use of high-temperature electric furnace sand fast fried, impeller mixer quickly stir the rapid dissolution of chloride ions in the sand can quickly detect the content of chloride ions in the sand, Time-consuming reduced to 30 minutes, verified, and nitrate nitrate titration test results are basically the same.