摘要
为了研究钢渣粉磨时间和矿渣钢渣复掺比例对矿渣-钢渣-熟料-石膏体系胶凝材料强度的影响,采用一次线性回归得到胶凝材料强度的变化趋势,并利用XRD和SEM方法分析钢渣粉磨和净浆的水化过程.试验表明:矿渣与钢渣的复合比为7∶1,钢渣和矿渣的比表面积分别为550和480 m2/kg,且与质量分数10%的水泥熟料和质量分数10%的脱硫石膏复合的胶凝材料具有较高的强度.以优化后的胶凝材料代替水泥,并以热闷法稳定化的钢渣颗粒为骨料,可以制备出抗压强度达到60 MPa以上,水泥熟料总用量为2%的高强人工鱼礁混凝土.研究表明,对钢渣适度粉磨能改善钢渣性能,适量加入钢渣对促进体系的水化有积极作用.
A cementitious material of iron slag-steel slag-clinker-gypsum system was prepared and the effect of grinding time of steel slag and mixing ratio of iron slag to steel slag on the strength was investigated.A linear regression was used to get the strength change trend of cementitious material,XRD and SEM were used to analyze the grinding process of steel slag and the hydration process of the cementitious material net slurry.The results showed that with the ratio of iron slag ：steel slag= 7：1,and when 10% cement clinker and 10% gypsum of Flue Gas Desulfurization Waste（FGDW） were mixed with 80% iron and steel slags powder,the mixed cementitious material had an optimized strength.The optimized specific surface area are 550 m2/kg and 480 m2/kg for steel slag and iron slag powder respectively.The ordinary portland cement can be totally substituted by such a mixed cementitious material with iron and steel slags as its major components in preparing the concrete for building high-strength artificial reefs.A concrete with a compressive strength over 60 MPa can be prepared by using such a mixture as a cementitious material and steel slag grains as its fine and coarse aggregates which have been stabilized by a hot-simmering method.The total usage of cement clinker can be as low as 2% in weight in the final high strength artificial reef concrete.The results show that a moderate grinding process can improve the reaction property of the steel slag.A proper mixing ratio of steel slag powder into the system is helpful to the hydration process.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2013年第1期73-78,共6页
Materials Science and Technology
基金
国家海洋局海洋公益性行业科研专项经费重点项目(200805030)
关键词
钢渣
矿渣
胶凝材料
高强混凝土
人工鱼礁
iron and steel slags
cementitious material
high-strength concrete
artificial reefs
