兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (5): 138-143.

• 建筑科学 • 上一篇    下一篇

钢渣粒度分布对钢渣水泥水化特性影响的灰度分析

南雪丽*1,2, 杨蓝蓝1,2, 唐维斌1,2, 韩博1,2, 王超杰1,2   

  1. 1.兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 甘肃 兰州 730050;
    2.兰州理工大学 材料科学与工程学院, 甘肃 兰州 730050
  • 收稿日期:2019-03-20 出版日期:2021-10-28 发布日期:2021-11-18
  • 通讯作者: 南雪丽(1977-),女,甘肃定西人,副教授,硕士.Email:nanxueli@163.com
  • 基金资助:
    甘肃省住房和城乡建设厅科研项目(JK2017-15)

Gray correlation analysis of the influence of particle size distribution of steel slag on hydraulic activity of steel slag cement

NAN Xue-li1,2, YANG Lan-lan1,2, TANG Wei-bin1,2, HAN Bo1,2, WANG Chao-jie1,2   

  1. 1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou Univ. of Tech., Lanzhou 7300502, China;
    2. College of Material Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China
  • Received:2019-03-20 Online:2021-10-28 Published:2021-11-18

摘要: 利用机械激发的原理,从强度与Ca(OH)2含量两个方面,研究不同球磨时间下钢渣粉的粒度特性以及比表面积对钢渣水泥胶砂水化性能的影响,同时采用灰色关联分析方法探讨钢渣颗粒粒径与钢渣水泥胶砂强度和水化程度的影响规律.结果表明:球磨时间增加,钢渣比表面积增大,活性随之增强;通过DTG热分析发现钢渣的比表面积的变化会影响水化产物Ca(OH)2结晶和晶体生长速率;钢渣粉中10~20μm粒级对钢渣水泥强度促进作用最大,5~10 μm粒级对钢渣水泥28 d Ca(OH)2含量促进作用最大,因此增加5~20 μm范围的钢渣颗粒含量,有利于提高钢渣活性.

关键词: 钢渣, 比表面积, 灰色关联分析, 强度, 水化

Abstract: Based on the principle of mechanical activation, the effects of particle size distribution and specific surface area of steel slag powderfor different grinding time on the hydration properties of steel slag cement mortar were studied from two aspects of strength and Ca(OH)2 content. And the influence of particle size of steel slag on the strength and hydration performance of steel slag cement mortar was researched by the gray relational analysis method. The results show that the specific surface area of steel slag and its activity increase with the grinding time; DTG thermal analysis shows that the specific surface area of steel slag affects the crystallization and crystal growth rate of Ca(OH)2; Slag powder particles with the sizes of 10~20 μm have the greatest effect on the strength of steel slag cementand those with the sizes of 5~10 μm play a catalytic role in the content of Ca(OH)2 at the 28th day. Therefore, increasing the content of steel slag particles in the range of 5~20 μm is beneficial to the activity of steel slag.

Key words: steel slag, specific surface area, grey correlation analysis, strength, hydration

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