Hidehiro Gotô and Yachiyo Kakita
The determination of free lime in slag was investigated. Generally the free lime in cement is determined by Lerch and Bogue's method or McPherson and Eorbrich's method. Appling the McPherson and Forbrich's method by the use of ethylen glycol, the determination of free lime in slags was studied. The powdered slags was warmed up to 60 ∼ 70°C with ethylen glycol to extract free lime, and after it was filtered, the filtrate was titrated with standard hydrochloric acid (0.1 N) to estimate free lime. By this method, free lime in several kinds of slags and cement was determined and the results obtained were shown. This determination was carried out successfully within about a half an hour without any complicated procedure.
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