摘要
通过正交试验研究了用作制备高强度人工鱼礁的钢渣--矿渣--熟料--石膏体系胶凝材料的强度.净浆正交试验表明:钢渣∶矿渣的复合比为5∶3,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50 MPa以上的人工鱼礁混凝土.利用X射线衍射和扫描电镜分析净浆的水化过程,发现体系在早期水化主要生成AFt相和C--S--H凝胶,在后期钢渣和矿渣的火山灰活性反应对强度的增长起主要作用.
The strength of a cementitious material made from steel slag,iron slag,cement clinker and flue gas desulfurization（FGD） gypsum was optimize by orthogonal tests to prepare a concrete for building high-strength artificial reefs.When the ratio of steel slag to iron slag is 5∶3 and when 10% cement clinker and 10% FGD gypsum are mixed with 80% iron and steel slag powder,the mixed cementitious material has an optimized strength.A concrete with a compressive strength over 50 MPa can be prepared by using such a mixture as a cementitious material and steel slag grains as its aggregates which have been stabilized by a hot-simmering method.Hydration processes of the net slurry were analyzed by X-ray diffraction（XRD） and scanning electron microscopy（SEM）.The results show that early hydration products in the system are mainly AFt and C-S-H gel,and in the later stage the pozzolanic reaction of iron and steel slags contributes mainly to the increase in strength.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2012年第11期1308-1313,共6页
Journal of University of Science and Technology Beijing
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
混凝土
渣
胶凝材料
人工鱼礁
废弃物利用
concrete
slag
cementitious material
artificial reefs
waste utilization
