钒钛渣对硅酸盐水泥性能的影响研究  

Study on influence of vanadium-titanium slag on properties of Portland cement

作　　者：赵迪 刘旭月[1] 高伟强[1] 刘乔[1] 刘明昊 ZHAO Di(Tianjin Cement Industry Design&Research Institute Co.LTD.,Tianjin 300400,China)

机构地区：[1]天津水泥工业设计研究院有限公司,天津300131

出　　处：《水泥》2025年第3期9-13,共5页Cement

摘　　要：我国钒钛渣排放量大,堆存量高,大规模资源化利用需求迫切。本文对钒钛渣进行机械力活化处理,系统分析了钒钛渣细度(300~500 m^(2)/kg)及掺量(30%~50%)对硅酸盐水泥性能的影响规律,并结合微观分析探究了钒钛渣对水泥力学性能的影响机理,为钒钛渣硅酸盐水泥的设计制备提供依据。结果表明:钒钛渣对硅酸盐水泥流动度、需水量和安定性无不良影响,但掺量增加会延长水泥的凝结时间;水泥的力学性能随钒钛渣掺量增加而下降,通过增加钒钛渣细度可以提升水泥力学性能,控制钒钛渣掺量为30%~40%、比表面积为450~500 m^(2)/kg时可获得力学性能较优的水泥,其28 d抗压强度可达44.2~46.3 MPa;增加钒钛渣细度可提高钒钛渣火山灰活性并增强水化产物的异相成核效应,导致水泥水化程度提高、基体毛细孔体积降低,从而提升水泥力学性能。In China,vanadium-titanium slag has a large number of emissions and high storage capacity.Therefore,there is an urgent demand for massive resource utilization of vanadium-titanium slag.In this study,the vanadium-titanium slag was mechanically activated,and the effect of the fineness(300~500 m^(2)/kg)and dosage(30%~50%)on the properties of Portland cement was analyzed.Microscopic analysis was performed to explore the influencing mechanism of vanadium-titanium slag on the mechanical properties of cement.The purpose of this study is to provide a basis for the design and preparation of vanadium-titanium slag cement.The results exhibit that vanadium-titanium slag has no adverse impacts on the flowability,water demand,and stability of Portland cement.However,the setting time of cement will be extended with the dosage increasing.Furthermore,the mechanical properties of cement will be decrease with the increase of vanadium-titanium slag dosage,while the mechanical properties can be improved by controlling vanadium-titanium slag fineness.The vanadiumtitanium slag cement presents relatively high mechanical properties at the dosage of 30%~50%and the specific surface area of 450~500 m^(2)/kg of vanadium-titanium slag,the 28 d compressive strength of vanadium-titanium slag cement can reach 44.2~46.3 MPa.Increasing the fineness of vanadium-titanium slag can promote the pozzolanic activity of vanadium-titanium slag and enhance the heterogeneous nucleation of hydration products,which increases the hydration degree of cement and decreases the capillary pore volume of matrix,thus the mechanical properties of cement are enhanced.

关 键 词：钒钛渣 硅酸盐水泥 力学性能 水化程度 孔隙结构 

分 类 号：TQ172.44[化学工程—水泥工业]