摘要
通过正交试验研究了矿渣钢渣熟料石膏体系胶凝材料的强度。胶凝材料正交试验表明:矿渣:钢渣的复合比为7∶1,矿渣和钢渣的比表面积分别为480m2.kg-1和550m2.kg-1,并与10%的水泥熟料和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65MPa以上的人工鱼礁混凝土。利用XRD和SEM方法分析胶凝材料的水化过程,结果表明,水化反应主要生成AFt相和C-S-H凝胶,钢渣、水泥熟料和脱硫石膏的协同作用对矿渣的火山灰活性反应具有重要促进作用。
A method of orthogonal test was used to optimize the strength of the cementitious material for preparing the concrete of high-strength artifical reefs. The results show 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） was mixed with 80% iron and steel slags powder,the mixed cementitious material had an optimized strength. The optimized specific surface area are 480 m2/kg and 550 m2/kg for iron slag and steel 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 strengh over 65MPa can be prepared by using such a mixture as a cementitious material and steel slag grains as its fine and coarse aggregats which have been stubilized by a hot-simmering method. Hydration processes of net slurry were analysized by XRD and SEM methods. The results show that the hydration products in the system are mainly AFt and C-S-H gel. The results also show that the pozzolanic reaction of iron slags could be largely promoted by the coordinations of steel slags, clinker and FGDW.
出处
《土木建筑与环境工程》
CSCD
北大核心
2013年第3期145-150,共6页
Journal of Civil,Architectural & Environment Engineering
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
矿渣
钢渣
胶凝材料
混凝土
人工鱼礁
iron slags
stel slags cementitious material
concrete artificial reefs
