铁尾矿粉-脱硫灰胶凝材料的制备及性能研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (1): 180-187.

所属专题：资源综合利用

铁尾矿粉-脱硫灰胶凝材料的制备及性能研究

陈邢, 于峰, 曹越, 方圆

安徽工业大学建筑工程学院,马鞍山 243002

收稿日期:2022-09-11 修订日期:2022-10-01 出版日期:2023-01-15 发布日期:2023-02-15
通信作者: 于峰,博士,教授。E-mail:yufeng2007@162.com
作者简介:陈邢(1999—),女,硕士研究生。主要从事结构工程以及固废材料利用的研究。E-mail:1364287953@qq.com
基金资助:
国家自然科学基金(52078001,51878002);安徽省杰出青年基金(2008085J29);安徽省重大科技专项(202203a07020005);安徽省重点研究与开发计划( 2022i01020005)

Preparation and Properties of Iron Tailings Powder-Desulfurization Ash Cementitious Material

CHEN Xing, YU Feng, CAO Yue, FANG Yuan

College of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan 243002, China

Received:2022-09-11 Revised:2022-10-01 Online:2023-01-15 Published:2023-02-15

摘要/Abstract

摘要： 为提高铁尾矿和脱硫灰等工业固废的综合利用,利用氢氧化钠和硫酸钙作为复合激发剂,铁尾矿粉、脱硫灰和矿渣微粉为原料,制备铁尾矿粉-脱硫灰胶凝材料。开展正交试验分析铁尾矿粉掺量、脱硫灰掺量、氢氧化钠掺量和硫酸钙掺量对胶凝材料抗压强度的影响,并进行配合比优化。结合X射线衍射仪(XRD)和扫描电子显微镜(SEM)对材料的微观结构进行分析表征。结果表明:对胶凝材料3 d、7 d和28 d抗压强度影响最显著的分别是氢氧化钠掺量、铁尾矿粉掺量和硫酸钙掺量;铁尾矿粉、脱硫灰、氢氧化钠和硫酸钙的最佳掺量分别为20%、10%、1%和9%(质量分数),此时,胶凝材料3 d抗压强度为4.59 MPa,28 d抗压强度为18.44 MPa,微观结构致密,宏观强度最高。

关键词: 胶凝材料, 铁尾矿粉, 脱硫灰, 正交试验, 抗压强度, 微观分析

Abstract: In order to improve the comprehensive utilization of industrial solid waste such as iron tailings and desulfurization ash, sodium hydroxide and calcium sulfate were used as composite excitant, and iron tailings powder, desulfurization ash and slag powder were used as raw materials to prepare iron tailings powder-desulfurization ash cementitious material. The orthogonal test was carried out to analyze the effects of iron tailings powder content, desulfurization ash content, sodium hydroxide content and calcium sulfate content on the compressive strength of the cementitious material and the mix proportion was optimized. The microstructure was characterized by X-ray diffractometer (XRD) and scanning electron microscope (SEM). The results show that the content of sodium hydroxide, iron tailings powder and calcium sulfate has the most significant effects on the 3 d, 7 d, and 28 d compressive strength of the cementitious material, respectively. The optimal content of iron tailings powder, desulfurization ash, sodium hydroxide and calcium sulfate are 20%, 10%, 1% and 9% (mass fraction), respectively. Meanwhile, the 3 d compressive strength of cementitious material is 4.59 MPa, and the 28 d compressive strength is 18.44 MPa, with a dense microstructure and the highest macroscopic strength.

Key words: cementitious material, iron tailings powder, desulfurization ash, orthogonal test, compressive strength, micro analysis

中图分类号:

TU526

陈邢, 于峰, 曹越, 方圆. 铁尾矿粉-脱硫灰胶凝材料的制备及性能研究[J]. 硅酸盐通报, 2023, 42(1): 180-187.

CHEN Xing, YU Feng, CAO Yue, FANG Yuan. Preparation and Properties of Iron Tailings Powder-Desulfurization Ash Cementitious Material[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(1): 180-187.

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铁尾矿粉-脱硫灰胶凝材料的制备及性能研究

Preparation and Properties of Iron Tailings Powder-Desulfurization Ash Cementitious Material

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