钢渣粉的制备及其对无熟料混凝土强度的影响

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• 英文论文题名：Preparation of Steel Slag Powder and Its Effect on Compressive Strength of Non-Clinker Concrete
• 论文作者：马旭明 ; 倪文 ; 刘轩
• 英文论文作者：Ma Xuming ; Ni Wen ; Liu Xuan ; Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants ; Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines ; School of Civil and Environmental Engineering ; University of Science and Technology Beijing
• 年：2016
• 作者机构：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全教育部重点实验室工业典型污染物资源化处理北京市重点实验室;
• 论文关键词：钢渣粉 ; 矿渣粉 ; 无熟料混凝土 ; 水化分析
• 英文论文关键词：steel slag powder ; granulated blast furnace slag powder ; non-clinker concrete ; hydration analysis
• 会议召开时间：2016-08-28
• 会议录名称：第七届尾矿与冶金渣综合利用技术研讨会暨招远市循环经济项目招商对接会论文集
• 语种：中文
• 分类号：TU528;X757
• 学会代码：EUGQ
• 会议名称：第七届尾矿与冶金渣综合利用技术研讨会暨招远市循环经济项目招商对接会
• 会议地点：中国山东招远
• 主办单位：中国循环经济协会、尾矿综合利用产业技术创新战略联盟、招远市人民政府
• 学会名称：中国硅酸盐学会
• 页数：7
• 文件大小：1305k
• 原文格式：O
• 会议级别：全国

摘要

以钢渣-矿渣-脱硫石膏作为胶凝材料制备无熟料混凝土,研究钢渣对无熟料混凝土抗压强度的影响,并通过XRD、DSC-TG和FE-SEM分析无熟料胶凝体系的水化机理。采用分段磁选可制备出金属铁含量为0.49%的钢渣粉。结果表明,当钢渣粉和矿渣粉的质量比为1:2.5,无熟料混凝土28d强度为55.97MPa。钢渣、矿渣和脱硫石膏彼此促进水化作用生成水化产物C-S-H凝胶和AFt。早期钢渣水化促进矿渣的解聚并与脱硫石膏生成AFt三维网络结构,中后期胶凝体系以生成C-S-H凝胶为主填充硬化浆体的孔隙结构保证强度的增长。
The non-clinker concrete was prepared by the cementitious material that was composed of steel slag,granulated blast furnace slag(GBFS) and flue gas desulfurization gypsum(FGDG).The influence of steel slag on compressive strength of non-clinker concrete was investigated.And the hydration mechanism of cementitious system was studied by XRD,DSC-TG and FE-SEM test methods.The metallic iron content of steel slag was 0.49%that can be obtained by segmented magnetic separation.The results showed that the 28 d compressive strength of non-clinker concrete achieved 55.97 MPa as the mass ratio of steel slag and GBFS was 1:2.5.The steel slag,GBFS and FGDG promoted the hydration of each other,which the main hydration products were C-S-H gel and ettringite.In the early age,the hydration of steel slag accelerated the depolymerization of GBFS and reacted with FGDG that formed ettringite with a three-dimensional network structure.In the middle and later age,cementitious system focused on the production of C-S-H gel which filled in pores of hardened paste and ensured the strength development.

引文

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