Study on Mechanical and Microscopic Properties of Magnesium Phosphate Cement-based Canvas
LIU Xiongfei1,2, WANG Nan1, HAO Yifei1,*, LI Hui1
1 School of Civil Engineering and Transportation, Hebei University of Technology, Tianjin 300401, China 2 Engineering Research Center on Construction 3D Printing of Hebei, Tianjin 300401, China
Abstract: A new type of emergency protection material of MPC canvas was developed based on the characteristics of magnesium phosphate cement (MPC), fast hardening, high early strength, and excellent bonding strength. The effects of magnesium/phosphate molar ratio (M/P=3—8) and water-cement ratio (W/C=0.15—0.5) on the compressive and flexural strengths of MPC canvas were studied. The hydration morphology, product, and pore structure of MPC in canvas were analyzed by XRD, SEM, and X-CT, respectively. The optimization design method of MPC canvas was proposed. The experimental results showed that M/P significantly affected the mechanical properties of MPC canvas. When the molar ratio of M/P was 6, the compressive and flexural strengths of the MPC canvas reached the highest values of 26.65 MPa and 6.20 MPa at 28 d of age, respectively. W/C determined the hydration degree of MPC in canvas. Low or excessive W/C cannot ensure the integrity of MPC in canvas. 0.35 was the optimum W/C for MPC canvas, the compressive and flexural strengths of the MPC canvas reached the highest values of 26.90 MPa and 6.30 MPa at 28 d of age. The hydration products (K-struvite) reached the maximum content, and the interface between MPC and canvas fabric was compact. The porosity reached the minimum value of 7.63%, and the integrity of the MPC canvas was the optimum.
刘雄飞, 王楠, 郝逸飞, 李辉. 磷酸镁水泥基帆布力学与微观性能研究[J]. 材料导报, 2024, 38(17): 23090003-6.
LIU Xiongfei, WANG Nan, HAO Yifei, LI Hui. Study on Mechanical and Microscopic Properties of Magnesium Phosphate Cement-based Canvas. Materials Reports, 2024, 38(17): 23090003-6.
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2024, Vol. 38 
