METHOD OF MEASURING NITRITE ION CONTENT

To provide a method of measuring a nitrite ion content in which the nitrite ion content in concrete can be easily, safely and speedily measured.SOLUTION: The present invention relates to a method of measuring the nitrite ion content in concrete impregnated with a concrete repair liquid including nit...

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Bibliographic Details
Main Authors TOKUNO TAKESHI, SUDO YUJI, OMORI KENTARO, TAKEDA NOBUFUMI
Format Patent
LanguageEnglish
Japanese
Published 08.02.2024
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Summary:To provide a method of measuring a nitrite ion content in which the nitrite ion content in concrete can be easily, safely and speedily measured.SOLUTION: The present invention relates to a method of measuring the nitrite ion content in concrete impregnated with a concrete repair liquid including nitrite, and the method has the processes of: collecting concrete powder from the concrete; measuring an absorbancy through pure water extraction of the collected concrete powder and then color reaction using a Griess coloring reagent; and calculating the nitrite ion content from an absorbancy measured based upon a previously created contrast table of absorbancies and nitrite ion contents. In the process of collecting the concrete powder, it is preferably that the concrete powder is collected in each of regions differing in depth from the surface.SELECTED DRAWING: None 【課題】コンクリート中の亜硝酸イオン含有量を簡便、安全、迅速に測定することの可能な亜硝酸イオン含有量の測定方法を提供する。【解決手段】亜硝酸塩を含むコンクリート補修液を含浸させたコンクリート中の亜硝酸イオン含有量の測定方法であって、コンクリート中からコンクリート粉末を採取する工程と、採取したコンクリート粉末を純水抽出しグリース法呈色試薬により呈色させて吸光度を測定する工程と、予め作成した吸光度と亜硝酸イオン含有量との対比表に基づいて測定した吸光度から亜硝酸イオン含有量を算出する工程と、を有する。コンクリート粉末を採取する工程において、表面からの深さが異なる部位毎にコンクリート粉末を採取することが好ましい。【選択図】なし
Bibliography:Application Number: JP20220119213