Magnesium-based cementitious material, preparation method and application thereof

US11680014B2 · kind B2 · utility

Assignee

• WUHAN UNIVERSITY OF TECHNOLOGY · CN

Inventors

• Fazhou Wang · 红钢城街道, CN
• Zhichao Liu · Shanghai, CN
• Shuguang Hu · 红钢城街道, CN

Key dates

• Filing date: Sep 9, 2022
• Grant date: Jun 20, 2023
• Expiry date: Sep 9, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2111/00215
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Disclosed is a magnesium-based cementitious material, preparation method and application thereof. The magnesium-based cementitious material, comprising magnesite, sandstone, and water, wherein: the magnesite is provided with CaO, SiO2, Al2O3, Fe2 O3, and MgO, a mass percentage of the CaO is less than 5%, a mass percentage of SiO2 is less than 5%, a mass percentage of Al2 O3 is less than 5%, a mass percentage of Fe2 O3 is less than 7%, a mass percentage of MgO is between 37% and 50%; the sandstone is provided with SiO2, CaO, Al2 O3, and Fe2O3, a mass percentage of SiO2 is greater than 70%. The beneficial effects of this disclosure are: the cementitious material does not contain MgCl2, which avoids the reduction of the strength of the cementitious material due to the dissolution of MgCl2 in water; the magnesium-based cementitious material of this disclosure is immiscible with water and has strong water resistance.