鞍钢钢渣矿渣制备人工鱼礁混凝土复合胶凝材料  

Preparation of Composite Cementitious Material for Building Artifical Reefs Concrete from Angang Steel Slag and Granulated High Furnace Slag

作　　者：李琳琳[1] 苏兴文[2] 李晓阳[2] 倪文[1] 王中杰[1] 李颖[1] 胡文[1] 

机构地区：[1]北京科技大学土木与环境工程学院,金属矿山高效开采与安伞教育部重点实验室,北京100083 [2]鞍钢集团矿渣开发公司,鞍山114021

出　　处：《硅酸盐通报》2012年第1期117-122,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家海洋局海洋公益性行业科研专项经费重点项目(No.200805030)

摘　　要：以81.5%的矿渣、5%的钢渣、12.5%的脱硫石膏以及1%的水泥熟料,制备出了28 d抗压强度为56.75 MPa的低碱度胶凝材料,该胶凝材料可用于制备低碱度人工鱼礁混凝土。通过改变钢渣和脱硫石膏的掺量,研究了其掺量变化与试件强度的影响关系。实验结果表明:在该体系中,当钢渣掺量小于5%时,胶砂试块的强度随着钢渣的增加而提高;当钢渣掺量大于5%时,胶砂试块的强度随着钢渣掺量的增加而降低,并在钢渣掺量大于20%时快速下降。脱硫石膏的掺量对胶砂试块的强度影响更为显著;当脱硫石膏掺量达到12.5%时,与不含脱硫石膏的试样相比,抗压强度和抗折强度分别提高了168%和176%。利用XRD和SEM分析净浆的水化过程,结果表明,体系在早期水化主要生成AFt相和C-S-H凝胶,并对强度的增长起了主要作用。81.5% granulated high furnace slag,5% steel slag and 12.5% flue gas desulphurization（FGD） gypsum was mixed with 1% cement clinker.The compressive strength of the mixed cementitious material was 56.75 MPa after cured for 28 d.The prepared cementitious material had low calcium content compared with normal P.O.cement and was suitable for producing artificial reel concrete.The effects of different ratios of steel slag and FGD gypsum on the strength of the mortar samples were also studied.The results showed that the strength of the mortar samples increased with increasing the content of steel slag,when the content of steel slag was less than 5%,and the strength of the mortar samples decreased with increasing the content of seel slag when its content was more than 5%,while their strength droped sharply when the content of steel slag was more than 20%.The strength of the mortar samples was also prominently affected by the content of FGD gypsum.The compressive strength and flexural strength increased by 168% and 176% respectively compared with the samples without FGD gypsum when the content of FGD gypsum increased to 12.5%.Hydration processes of net slurry were analysized by XRD and SEM methods.The results showed that the early hydration products in the system were mainly AFt and C-S-H gel.The strength growth was mainly contributed by these two phases.

关 键 词：矿渣 钢渣 人工鱼礁混凝土 复合胶凝材料 

分 类 号：TU528[建筑科学—建筑技术科学]