摘要
通过复掺锰渣微粉和钢渣微粉取代部分硅酸盐水泥制备钢渣-锰渣复合胶凝材料,系统研究了锰渣掺量对复合胶凝材料力学性能、流动度、水化热、相组成及微观形貌的影响。结果表明,锰渣微粉的掺入能够有效激发钢渣微粉的潜在活性,改性复合胶凝材料的力学强度和微结构。其中,当锰渣微粉掺量为质量分数14%时复合胶凝材料具有最优性能,其7d抗折强度和抗压强度可达5.8MPa、31.4MPa,28d抗折强度和抗压强度高达7.1MPa、43.2MPa,水化放热量降低了约1/2。这主要是由于掺入锰渣可促使铝酸钙凝胶反应形成AFt,并使其填充于C-S-H凝胶间隙,水化产物相互交织,增大了材料的密实度。
The solid wastes of steel slag and manganese slag have been used to replace sectional portland cement to prepare steel slag-manganese slag composite cementitious material in this paper.The effect of manganese slag content on mechanical strength,fluidity property,hydration heat,phase composition and morphology of the composite cementitious material were studied.The results showed that the addition of manganese slag could motivate potential activity of steel slag,of which improved the strength and microstructure of the material.Among,the sample containing 14% manganese slag had the best properties,with 5.8 MPa breaking strength and 31.4 MPa compressive strength after 7 dage,7.1 MPa breaking strength and 43.2 MPa compressive strength after 28 dage,and the hydration heat had been decreased by 1/2.That was because manganese slag promoted calcium aluminate to form calcium sulfoaluminate hydrate,of which filled into the interval of C-S-H gel to lead the hydration products interweave with each other,resulting in density of the material increasing.
作者
陈平
胡成
向玮衡
田宇
刘荣进
CHEN Ping;HU Cheng;XIANG Wei-heng;TIAN Yu;LIU Rong-jin(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin University of Technology,Guilin 541004,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
北大核心
2019年第6期1-5,共5页
Journal of Wuhan University of Technology
基金
国家重点研发计划(2016YFB0303501)
国家自然科学基金(51362007)
关键词
钢渣
锰渣
复合胶凝材料
力学强度
水化热
steel slag
manganese slag
composite cementitious material
mechanical strength
hydration heat
