硅酸盐通报2024，Vol.43Issue(5)：1673-1682,10.
粉煤灰对粉末3D打印磷酸镁水泥基材料耐水性能的影响
Effect of Fly Ash on Water Resistance of Powder Bed 3D Printing Magnesium Phosphate Cement-Based Materials
摘要
Abstract
Magnesium phosphate cement-based material has the characteristics of fast hardening and early strength,which is suitable for cement-based powder bed 3D printing technology.In order to solve the problem of poor water resistance of powder bed 3D printing magnesium phosphate cement,the optimization of water resistance of powder bed 3D printing magnesium phosphate cement-based materials was carried out.The influence of M/P molar ratio on water resistance of materials was studied,and M/P molar ratio was optimized.The effect of fly ash incorporation on the printing performance and water resistance of powder bed 3D printing magnesium phosphate cement-based materials was studied,and the mechanism of fly ash improvement on water resistance of printing materials was revealed by combining the microscopic characterization methods.The results show that the compressive strength of powder bed 3D printing magnesium phosphate cement-based materials decreases under water curing condition.With the increase of M/P molar ratio,the water resistance of specimen is improved accordingly.The addition of fly ash can effectively improve the density and printing accuracy of the powder bed,increase the amount of hydration products,make the microstructure more dense,and improve the water resistance of specimen.By adding 20％(mass fration)fly ash,the compressive strength of materials increases by 89.00％at most after 28 d of water immersion,which provides strong support for improving the water resistance of powder bed 3 D printing magnesium phosphate cement-based materials and expanding the application of cement-based powder 3D printing technology.关键词
磷酸镁水泥/粉末3D打印技术/耐水性能/力学性能/粉煤灰Key words
magnesium phosphate cement/powder bed 3D printing technology/water resistance/mechanical property/fly ash分类
建筑与水利引用本文复制引用
刘晓江,李之建..粉煤灰对粉末3D打印磷酸镁水泥基材料耐水性能的影响[J].硅酸盐通报,2024,43(5):1673-1682,10.基金项目
国家自然科学基金(52108205) （52108205）
"十四五"国家重点研发计划子课题(2023YFC3806901) （2023YFC3806901）
