基于磁化水的高钛矿渣集料混凝土的制备及性能研究  

Study on the preparation and properties of high titanium slag aggregate concrete using magnetized water

作　　者：涂闽杰 TU Minjie(China State Construction Engineering Corporation Strait Construction and Development Co.,Ltd.,Fuzhou 350014,Fujian,China)

机构地区：[1]中建海峡建设发展有限公司,福建福州350014

出　　处：《钢铁钒钛》2025年第1期94-99,共6页Iron Steel Vanadium Titanium

基　　金：中建股份重点研发计划:《低成本建筑垃圾资源化利用关键技术与产业化应用研究》(CSCEC-2023-Z-7)。

摘　　要：为了改善高钛矿渣集料混凝土的工作性及力学性能,提出采用磁化水制备高钛矿渣集料混凝土,研究了不同流量磁化水对高钛矿渣集料混凝土工作性、力学性能的影响规律,并对其微观形貌及孔结构进行测试分析,结果表明:磁化水会改善高钛矿渣集料混凝土的工作性和强度,增加其含气量;但随着磁化水流量的增大,改善效果减弱。当水流量为40 mL/s时,其坍落度、扩展度、28 d抗压强度、60 d抗压强度较自来水高钛矿渣集料混凝土分别提升9.5%、14.9%、8.9%、11.6%。微观测试结果表明,磁化水高钛矿渣集料混凝土骨料与水泥基体裂纹较小,水化产物较多,未水化的水泥及矿物掺合料较少,反应程度更高,高钛矿渣骨料与水泥基体间的“销栓效应”进一步增强;且无害孔比例较高,有害孔比例较少,结构更加致密,进而强度较好。To improve the workability and mechanical properties of high titanium slag aggregate concrete,this paper proposed the use of magnetized water for its preparation.The study investigated the effects of different flow rates of magnetized water on the workability and mechanical properties of high titanium slag aggregate concrete,and conducted tests and analyses on its micro morphology and pore structure.The results show that magnetized water enhances the workability and strength of high titanium slag aggregate concrete and increases its air content.However,as the flow rate of magnetized water increases,the improvement effect diminishes.When the water flow rate is 40 mL/s,the slump,spread,28 d compressive strength,and 60 d compressive strength are respectively increased by 9.5%,14.9%,8.9%,and 11.6%compared with tap water high titanium slag aggregate concrete.The microstructural test results indicate that the cracks between the aggregate and cement matrix of the magnetized water high titanium slag aggregate concrete are smaller,with more hydration products and fewer unhydrated cement and mineral admixtures,resulting in a higher degree of reaction.The"pinning effect"between the high titanium slag aggregate and the cement matrix is further enhanced.Additionally,the proportion of harmless pores is higher,and the proportion of harmful pores is lower,making the structure denser and thus stronger.

关 键 词：磁化水 高钛矿渣集料混凝土 工作性 抗压强度 微观结构 

分 类 号：TU528.0[建筑科学—建筑技术科学]