钒钛磁铁矿尾矿/粉煤灰漂珠砂浆EPS复合材料的制备与性能研究OA
Study on Preparation and Performance of Vanadium-Titanium-Magnetite Tailings/Fly Ash Float Bead Mortar EPS Composites
目前,我国大规模开采钒钛磁铁矿而产生的巨量尾矿对生态环境造成严重危害.另外,聚苯乙烯泡沫保温材料阻燃性能差,限制其应用发展.因此,采用钒钛磁铁矿、水泥和聚苯乙烯泡沫作为主要原料,选择粉煤灰漂珠代替部分尾矿来制备强度高、隔热性能好的复合材料.结果表明,当容重为 600 g/L,粉煤灰漂珠替代钒钛磁铁矿尾矿细砂的比重为 30%时,复合材料的导热系数为 0.34 W/(m·K),复合材料具有较好的力学性能.养护 7 d的抗折强度与抗压强度分别为 1.05、2.50 MPa,养护 28 d的抗折强度与抗压强度分别为 1.03 MPa与 2.52 MPa.粉煤灰漂珠的加入并未影响水泥的水化反应,没有新的水化产物产生.
At present,the massive amount of tailings generated by the large-scale mining of vanadium-titanium-magnetite in China poses a serious threat to the ecological environment.In addition,polystyrene foam insulation materials have poor flame retardancy,which limits their application and development.Therefore,vanadium titanium magnetite,cement and polystyrene foam are used as the main raw materials,and fly ash floating beads are selected to replace some tailings to prepare composite materials with high strength and good thermal insulation performance.The results show that when the bulk density is 600 g/L and the proportion of fly ash floating beads replacing vanadium-titanium-magnetite tailings fine sand is 30%,the thermal conductivity of the composite material is 0.34 W/(m·K),and the composite material has good mechanical properties.The flexural strength and compressive strength after 7 d of curing are 1.05 MPa and 2.50 MPa,respectively,and the flexural strength and compressive strength after 28 d of curing are 1.03 MPa and 2.52 MPa,respectively.The addition of fly ash floating beads do not affect the hydration reaction of cement,and no new hydration products are produced.
韩维康;柴宗册;房明浩;闵鑫;黄朝晖;刘艳改;吴小文;米瑞宇
中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083中国地质大学(北京)材料科学与工程学院,北京 100083
土木建筑
钒钛磁铁矿尾矿综合利用砂浆复合保温材料尾矿细砂
vanadium-titanium-magnetite tailingscomprehensive utilizationmortar composite insulation materialtailings fine sand
《中国资源综合利用》 2025 (1)
1-8,8
国家重点研发计划项目课题(2021YFC1910603).
评论