大掺量冶金渣制备高强度人工鱼礁混凝土的试验研究  

Experimental investigation on concrete made from iron and steel slags for building high-strength artificial reefs

作　　者：李颖[1,2] 倪文[1,2] 陈德平[1,2] 王中杰[1,2] 张斌[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《北京科技大学学报》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)

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.

关 键 词：混凝土 渣 胶凝材料 人工鱼礁 废弃物利用 

分 类 号：TU528.31[建筑科学—建筑技术科学]