| 摘要 |
PURPOSE:To attain not only to simplify measurement but also to enhance measuring accuracy, by specifying the ion in the specimen taken out from concrete not yet solidified and measuring the unit water content of the specimen from the change in concns. before and after the same specific ion as the ion in the specimen is added. CONSTITUTION:The ion contained in the specimen partially taken out from concrete not yet solidified is specified and the concn. of the specified ion in the specimen is measured. The concn. of the ion is directly measured from the specimen from the aspect of operability and rapidness. For example, an ion electrode method is employed. A definite amount of the same ion as the ion of which the concn. was measured is added to the specimen after the concn. of the ion was measured and the concn. of the ion added to the specimen after the addition of the ion is measured. From the change in the concns. of the ion before and after the addition of the ion, the unit water content in concrete not yet solidified is calculated. By this method, the simplification of measurement and the enhancement of measuring accuracy are achieved. |
