A kind of early strong basic magnesium sulfate cement and preparation method thereof

Abstract

The invention provides high-early-strength basic magnesium sulfate cement and a preparation method thereof. The preparation method includes: mixing first active magnesium oxide, a dispersing agent, afirst additive and magnesium sulfate aqueous solution to obtain emulsion; mixing the emulsion with second active magnesium oxide and a second additive, and hardening to obtain the high-early-strengthbasic magnesium sulfate cement. By adoption of the preparation method, the high-early-strength basic magnesium sulfate cement can be prepared, and product production efficiency can be greatly improved.

Description

technical field

[0001] The invention relates to the technical field of inorganic gelling materials, in particular to an early-strength basic magnesium sulfate cement and a preparation method thereof. Background technique

[0002] Basic magnesium sulfate cement is a new type of air-hardening magnesia cementitious material developed after magnesium oxychloride cement and magnesium oxysulfide cement. gelling material. Similar to magnesium oxysulfate cement, basic magnesium sulfate cement also belongs to MgO-MgSO 4 -H 2 O ternary system, the difference is that due to the addition of additives, its hydration products have undergone fundamental changes.

[0003] The conventional preparation method of basic magnesium sulfate cement directly mixes magnesium sulfate solution, magnesium oxide and admixture, and its early strength is very low, which not only affects the production efficiency of its products, but also has low tensile strength due to low early strength. , thus prone ...