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The reactivity of Magnesium Oxide MgO expansion agent in cement concrete water environment. There are many varieties of Magnesium Oxide MgO expanders. Test method for effective Magnesium Oxide MgO content in Magnesium Oxide MgO expanders.

The method is to make the Magnesium Oxide MgO expander sample react in a buffer solution with a pH value of 13.0, and detecting Magnesium Oxide MgO in the Magnesium Oxide MgO expander sample can exclude the undecomposed magnesite in the Magnesium Oxide MgO expander. The content of magnesium and magnesium in Magnesium Oxide MgO that has been partially absorbed by moisture.

The buffer solution is an aqueous sodium hydroxide solution, which can effectively eliminate the influence of CaO in the Magnesium Oxide MgO expansion agent, and ensure that the measured Magnesium Oxide MgO content is an effective Magnesium Oxide MgO content that can react with water, so that the measured result can be more effective. It truly reflects the reaction ability of Magnesium Oxide MgO expansion agent in cement concrete hydration environment, which is closely related to the expansion performance of Magnesium Oxide MgO expansion agent in cement concrete.