Influence of different modifiers on properties of magnesium sulphide plate
The effects of the contents of succinic acid,citric acid,and malic acid(0,0.5％,1.0％,1.5％,2.0％,2.5％)on the workability and mechanical properties of magnesium sulphide plate were studied separately,and the micro mechanism analysis was conducted.The results show that the addition of succinic acid or malic acid basically reduces the setting time of magnesium oxychloride cement,while the addition of citric acid prolongs the setting time of magnesium oxychloride cement.Adding appropriate content of succinic acid,citric acid,or malic acid can improve the flexural strength and compressive strength of magnesium oxychloride cement.Malonic acid,citric acid,and malic acid can inhibit the formation of Mg(OH)2 to a certain extent,promote the formation of 5·1·7 phase,thus improving the compactness of the matrix and reducing porosity.
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