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郭   乾1 ,  张    浩2 ,  夏威夷3 ,  季   涛1 ,  林斌伟4

 

(1 . 南京工程学院 建筑工程学院 ，南京 211167 ;  2.  中国电建集团山东电力建设第一工程有限公司 ，济南 250102;3 .  江苏省环保集团有限公司 ，南京 210036 ;  4.  厦门市政南方海洋科技有限公司 ，厦门 361021)

摘   要： 以黄金尾矿 、粉煤灰和矿渣制备地聚物矿浆 ，通过抗压强度 、吸水性 、流动度和压汞试验 ，探讨不同水固比和 NaOH 浓度对地聚物－尾矿砂浆力学特性的影响。结果表明： 随着水固比的增大 ，抗压强度 、表观密度先增大后降低 ，吸水率则先降低后增大 ；随着 NaOH 摩尔浓度的增大 ，抗压强度和流动度先增大后降低 ，表观密度和吸水率变化不明显 ；对比 NaOH 浓度为 2 和 8 mol/L 激发的试样 ，前者孔隙结构更加致密 ， 因此抗压强度更高 ，吸水率更低。

关键词：粉煤灰 ；尾矿 ；地聚物 ；流动度 ；抗压强度 ；孔隙分布

中图分类号：TD982 ,  TU526           

文献标志码：A            

文章编号： 1005- 8249  (2025)  05- 0028- 05

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .05 .006

GUO Qian1  ,  ZHANG Hao2 ,  XIA Weiyi3 ,  JI Tao1 ,  LIN Binwei4

( 1 . School of Civil Engineering and Architecture , Nanjing Institute of Technology , Nanjing 211167 , China;

2. Powerchina Sepco1  Electric Power Construction Co . , Ltd. , Ji ’nan 250102 , China;

3 . Jiangsu Environmental Protection Group Co . , Ltd. , Nanjing 210036 , China;

4. Xiamen Municipal Southern Ocean Technology Co . ,  Ltd. ,  Xiamen 361021 , China)

Abstract : Geopolymer  mortar  was prepared  with gold  tailings , fly ash ( FA) , and ground  granulated  blast  furmace slag (GGBS) . Compression  tests , water  absorption  tests , flowability  tests , and  mercury  intrusion  tests  were conducted ,  and the effects of different  water - to - solid ( w/s) ratios  and  NaOH concentrations on compressive strength ,  water absorption ,  and pore structure were investigated. The results  revealed that the compressive  strength and apparent density first increased and then decreased as the w/s ratio increased ,  whereas the water absorption was the opposite . As the NaOH concentration increased , the compressive strength and  flowability  first  increased and then decreased ,  whereas the changes  in apparent density and water absorption were not significant. Compared  with  the  samples  activated  with  NaOH concentrations of 2  and 8  mol/L , the  former had a denser pore structure ,  which resulted in higher compressive strength and lower water absorption.

Key words :  fly ash;  tailing;  geopolymer;  flowability;  compressive strength;  pore size distribution

基金项目：河南省基础设施腐蚀防控重点实验室开放基金课题  ( HNICP202406) ；南京工程学院引进人材科研启动基金项 目(YKJ202027) 。

作者简介： 郭   乾  (1983—) ,   男 ，博士 ，讲师 ，研究方向： 固废资源化。

收稿日期：2024 - 1 1 - 13