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Application and Properties of Organic Emulsion Coated Phosphogypsum in aluminous rock Based Mineral Polymer Composite

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Journal of Wuhan University of Technology(Materials Science) 2021年第6期36卷 830-838页

作者： CHENG Jiangguo ZHANG Jie XIE Fei TUO Biyang ZHANG Yusong College of Materials and Metallurgy Guizhou UniversityGuiyang 550025China Mining College Guizhou UniversityGuiyang 550025China Guizhou Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources Guiyang 550025China National&Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas Guiyang 550025China

A polarizing microscope,X-ray diffraction(XRD),fourier transform infrared spectrometer(FTIR),scanning electron microscope and energy dispersive spectrometer(SEM-EDS),X-ray photoelectron spectroscopy(XPS),and micro computed tomography(Micro CT)were used to investigate the relation between the structure and properties of the ***,the physical properties,mechanical properties and strength mechanism were *** experimental results show that the structure and morphology of coated phosphogypsum remain intact in the composite,which shows good compatibility and forms a clear interface layer of transition zone between the coated phosphogypsum and the matrix,conforming to the structure of particle reinforced inorganic *** emulsion coated phosphogypsum has a certain strengthening effect on the aluminous rock mineral polymer *** compressive strength of the composite can reach 16.5 MPa when the amount of coated phosphogypsum is 40%,and the apparent density is 1.75 g·cm^(-3),which is significantly lower than that of common concrete;the thermal stability of the composite is also improved to a certain *** certain chemical reactions occur in the process of forming the matrix of aluminous rock mineral polymer materials,with a structure of three-dimensional *** research will provide a new way for the comprehensive utilization of phosphogypsum and low-grade aluminous rock.

关键词： composite organic emulsion coated phosphogypsum aluminous rock sodium silicate structure and performance

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