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It was proved that MgO and MicroSilica can react at room temperature, giving a hardened product primarily comprised of Mg(OH)_2 and Magnesium Silicate Hydrate (M-S-H). The reaction ratio and process and the chemical composion of M-S-H were studied and analyzed by QXRD and DTA-TG. The experimental results indicate that much Mg(OH)_2 and less M-S-H were formed at early period. After 7 days there is no change in the quantity of Mg(OH)_2, while M-S-H was increased slowly. The chemical composion of M-S-H would vary with the mix proportion in the hydration process , but M_ 1.32SH_ 2.37 is finally the approximate form.
It was proved that MgO and MicroSilica can react at room temperature, giving a hardened product comprised of Mg (OH) _2 and Magnesium Silicate Hydrate (MSH). The reaction ratio and process and the Chemical Composition of MSH were studied and analyzed by QXRD and DTA-TG. The experimental results that that Mg (OH) _2 and less MSH were formed early in. After 7 days there is no change in the quantity of Mg (OH) _2, while MSH was increased slowly. The chemical composion of MSH would vary with the mix proportion in the hydration process, but M_ 1.32SH_ 2.37 is finally the approximate form.