无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (6): 116-123.doi: 10.19964/j.issn.1006-4990.2022-0093

• 环境·健康·安全 • 上一篇    下一篇

铁尾矿粉水泥基材料的性能实验研究

许丽1(), 张强2   

  1. 1.运城职业技术大学 山西 运城 044000
    2.太原理工大学 土木建筑工程学院,山西 太原 030024
  • 收稿日期:2022-03-03 出版日期:2023-06-10 发布日期:2023-06-14
  • 作者简介:许丽(1989— ),女,副教授,硕士,从事矿产综合利用和矿产新型材料的制备;E-mail:plmojn2022@163.com

Experimental study on properties of iron tailings powder cement-based materials

XU Li1(), ZHANG Qiang2   

  1. 1. Yuncheng Vocational and Technical University,Yuncheng 044000,China
    2. College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China
  • Received:2022-03-03 Published:2023-06-10 Online:2023-06-14

摘要:

为了研究掺入铁尾矿粉对水泥基材料性能的影响,研究了铁尾矿粉掺入量对其微观结构性能、水化机理以及水化作用后矿物成分变化的影响。综合水泥基材料的物理力学实验结果,得出在铁尾矿粉掺量为30%(质量分数)、比表面积为450 m2/kg时,水泥基材料各项性能达到最佳。在同一水化时间作用下,随着铁尾矿掺量的不断增大,水泥基材料的水化放热速率与放热量均减小,且水泥基材料孔隙率的变化规律呈现出先减小后增大的趋势。而水泥基材料的XRD谱图衍射峰变化规律基本相似;但是Ca(OH)2的衍射峰强度值却不断减小;而二氧化硅衍射峰强度值的变化规律呈现出不断增大的趋势;硅酸二钙的衍射峰强度值和硅酸三钙的衍射峰强度值都呈现出减小的趋势。

关键词: 铁尾矿粉, 水泥基材料, 微观结构性能, 水化机理, 矿物成分变化

Abstract:

In order to study the effect of iron tailings powder on the properties of cement-based materials,the effect of iron tailings powder mixing amount on the microstructure properties,hydration mechanism and changes in mineral composition after hydration was studied.Based on the physical and mechanical test results of cementitious materials,it was concluded that the optimal performance of cementitious materials was achieved when the content of iron tailings powder was 30%(mass fraction) and the specific surface area was 450 m2/kg.Under the same hydration time,the heat release rate and heat release of cement-based materials were decreased with increasing of the content of iron tailings.The change law of the porosity of cement-based materials showed a trend of firstly decreasing and then increasing.The XRD patterns of cement-based materials had similar changes in diffraction peaks,but the intensity of the diffraction peaks of Ca(OH)2 was continuously reduced.The change law of the intensity value of the silica diffraction peak showed an increasing trend.Both the diffraction peak intensity value of dicalcium silicate and the diffraction peak intensity value of tricalcium silicate showed decreasing trends.

Key words: iron tailings powder, cement-based materials, microstructure properties, hydration mechanism, changes in mineral composition

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