EXPERIMENTAL RESEARCH ON MECHANICAL PROPERTIES OF MAGNESIUM OXYCHLORIDE-BASED TITANIUM GYPSUM CONCRETE

Abstract

To alleviate the environmental pollution, waste of resources of titanium gypsum (TG) and the industrial residue from the production of titanium dioxide by sulfuric acid method, and to develop new building materials, the effects of different dosage on the strength and microscopic properties of magnesium oxychloride cement (MOC) were studied by methods such as unlimited compressive strength, scanning electron microscope (SEM) and X-ray diffractometer (XRD). Results show that the compressive strength of the samples increases first and then decreases with the increase of the amount of titanium gypsum. In the control group, when the dosage was 0%, the compressive strength of the samples was 40.37 MPa. The compressive strength is 34.29 MPa at 50% dosage, which is lower than the compressive strength of the control group by 15.06%. The internal structure changes, and there is an incomplete reaction of SiO2. The addition of titanium gypsum increases the ductility of concrete, but has little effect on its elastic modulus. Therefore, the proper inclusion of TG in the TG-MOC gelling material can improve its deformation ability and maintain a certain strength. This provides a useful reference and guidance for the application of magnesium oxychloride-based titanium gypsum in engineering practice. Keywords: Magnesium oxychloride cement, Titanium gypsum, Mechanical propertie, Microscopic analysis, Compressive strength.