铁尾矿基复合掺合料混凝土性能的研究  

Properties of concrete prepared from iron tailings based composite admixture

作　　者：曾维 李北星 陈梦义 査进 

机构地区：[1]汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [2]海工结构新材料及维护加固技术湖北省重点实验室,湖北武汉430070

出　　处：《混凝土》2015年第10期78-81,86,共5页Concrete

基　　金：国家高技术研究发展计划(863计划)项目(2012AA062405)

摘　　要：采用自制的铁尾矿基复合掺合料（TBCA）配制强度等级为C20～C55的混凝土,并对比研究了掺TBCA与II级粉煤灰、S95级矿渣粉复合掺合料混凝土的强度与耐久性。结果表明：掺入30%的TBCA可配制出C20～C55强度等级的混凝土,TBCA对混凝土强度的影响与与II级粉煤灰相当,但低于S95级矿渣粉;掺入20%～40%的铁尾矿基复合掺合料的混凝土的抗碳化、抗氯离子渗透和抗冻等耐久性能,略低于II级粉煤灰与S95级矿渣粉复合掺合料的的混凝土,但影响并不明显。C20～C55 high performance concrete was designed and made by using homemade iron tailings based composite admixture（ TBCA）.The strength and durability of concrete with TBCA was also compared with concrete with II grade fly ash and S95 slag powder as composite admixture.The results show that high performance concrete of C20～C55 strength grade can be prepared by using 30%TBCA and the influence of TBCA on concrete strength is equivalent with II grade fly ash,while lower than S95 slag powder.The carbonization resistance、chloride ion penetration resistance and frost resistance of concrete with 20%～40%TBCA is slightly lower than concrete with admixture consisted of IIgrade fly ash and S95 slag powder,however, the influence isn＇t significant.

关 键 词：铁尾矿 复合掺合料 混凝土 强度 耐久性 

分 类 号：TU528.04[建筑科学—建筑技术科学]