广东工业大学学报 ›› 2024, Vol. 41 ›› Issue (02): 50-55.doi: 10.12052/gdutxb.230006

• 土木工程 • 上一篇    

硅灰对高炉镍铁渣粉水泥土性能影响机制研究

刘耿浩, 陆中宇   

  1. 广东工业大学 土木与交通工程学院, 广东 广州 510006
  • 收稿日期:2023-01-09 发布日期:2024-04-23
  • 通信作者: 陆中宇(1986-),男,教授,博士,主要研究方向为海水海砂混凝土、FRP耐久性,E-mail:luzy@gdut.edu.cn
  • 作者简介:刘耿浩(1998-),男,硕士研究生,主要研究方向为水泥土的耐久性,E-mail:2112109176@mail2.gdut.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(52078141)

Influence Mechanism of Silica Fume on Cement-Soil with Blast Ferronickel Slag

Liu Geng-hao, Lu Zhong-yu   

  1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2023-01-09 Published:2024-04-23

HTML

PDF (PC)

96

摘要： 高炉镍铁渣粉是一种前期火山灰活性较低的绿色可持续新型建筑材料。本文探讨了外掺硅灰对高炉镍铁渣粉水泥土无侧限抗压强度的影响规律，分析高炉镍铁渣粉和硅灰替代率对其无侧限抗压强度和破坏模式的影响。结合扫描电子显微镜(Scanning Electron Microscope, SEM)和X-射线衍射仪(X-ray Diffractometer, XRD)揭示硅灰对高炉镍铁渣粉水泥土性能影响机制。研究结果表明：在一定范围内，高炉镍铁渣粉水泥土的强度随硅灰掺量的增加而提升，归因于硅灰促进水泥水化反应以及硅灰发生二次火山灰反应生成C-S-H凝胶包裹土颗粒表面，未发生水化反应的颗粒减少，凝胶将土壤颗粒、高炉镍铁渣粉颗粒和小硅球等共同构建“网络状”空间骨架填充在大土壤颗粒之间，进一步提升了水泥土的密实性与强度，硅灰的最佳掺量为10%。硅灰掺量高会消耗大量Ca(OH)2，影响硅灰发生二次火山灰反应，特别是掺量增加至30%时，水泥土强度降低3.6%。

关键词: 高炉镍铁渣粉, 硅灰, 无侧限抗压强度, 影响机制, 微观分析

Abstract: Blast ferronickel slag is a both sustainable and environment-friendly material with low pozzolanic activity. The effect of silica fume on the unconfined compressive strength of cement-soil with blast ferronickel slag is studied, and the effect of the replacement rate of blast ferronickel slag and silica fume on the strength and failure pattern are analyzed. Scanning Electron Microscope and X-ray Diffractometer are used to explore the mechanism of the effect of silica fume on the properties of cement-soil with blast ferronickel slag. The results show that the strength of cement-soil with the increase of silica fume content increases, which is attributed to the fact that silica fume promotes cement hydration reaction and secondary pozzolanic reaction to produce C-S-H gel coating the surface of soil particles, and the particles without hydration reaction are reduced. Moreover, the soil particles, blast ferronickel slag and silica fume are packed by gel between the large soil particles to improve the compactness and strength of cement-soil. The best dosage of silica fume is 10%. However, excessive dosage of silica fume consumes Ca(OH)2 and affects the secondary pozzolanic reaction of silica fume. When the dosage increases to 30%, the strength of cement-soil decreases by 3.6%.

Key words: blast ferronickel slag, silica fume, unconfined compressive strength, influence mechanism, microanalysis

中图分类号: 

  • TU411
[1] HUANG Y, WANG Q, SHI M. Characteristics and reactivity of ferronickel slag powder [J]. Construction and Building Materials, 2017, 156: 773-789.
[2] XI B, LI R, ZHAO X, et al. Constraints and opportunities for the recycling of growing ferronickel slag in China [J]. Resources, Conservation and Recycling, 2018, 139: 15-16.
[3] 刘梁友, 刘云, 张康, 等. 镍铁渣用作混合材对水泥性能影响的研究[J]. 硅酸盐通报, 2016, 35(6): 1705-1715.
LIU L Y, LIU Y, ZHANG K, et al. Influence of nickel-iron slag used as admixture on cement properties [J]. Bulletin of the Chinese Ceramic Society, 2016, 35(6): 1705-1715.
[4] 娄广辉, 李银保, 符晓, 等. 镍铁渣的基本特性及其制备高强砖的研究[J]. 新型建筑材料, 2018, 45(6): 122-126.
LOU G H, LI Y B, FU X, et al. Bsasic characteristics of ferronickel slag and the preparation of high-strength brick [J]. New Building Materials, 2018, 45(6): 122-126.
[5] 中华人民共和国建材行业标准. 用于水泥和混凝土中的镍铁渣粉: JC/T 253-2018 [S]. 北京: 中国建筑学会, 2018.
[6] 林毓梅. 硅灰及硅灰混凝土综述[J]. 河海大学科技情报, 1990, 10(3): 59-67.
[7] 王德辉, 史才军, 吴林妹. 超高性能混凝土在中国的研究和应用[J]. 硅酸盐通报, 2016, 35(1): 141-149.
WANG D H, SHI C J, WU L M. Research and applications of ultra-performance concrete (UHPC) in China [J]. Bulletin of the Chinese Ceramic Society, 2016, 35(1): 141-149.
[8] 潘志华, 程麟, 李东旭, 等. 新型高性能泡沫混凝土制备技术研究[J]. 新型建筑材料, 2002(5): 1-5.
[9] ADIL G, KEVERN J T, MANN D. Influence of silica fume on mechanical and durability of pervious concrete [J]. Construction and Building Materials, 2020, 247: 1-9.
[10] 梁仕华, 陈俊涛, 林焕生, 等. 水泥固化淤泥废弃土作为填土材料的试验研究[J]. 广东工业大学学报, 2020, 72(2): 102-106.
LIANG S H, CHEN J T, LIN H S, et al. An experimental study of using cement stabilized silt as filling material [J]. Journal of Guangdong University of Technology, 2020, 72(2): 102-106.
[11] 梁仕华, 张朗, 周世宗. 水泥基固化剂固化南沙软土的力学及微观试验研究[J]. 广东工业大学学报, 2015, 32(2): 17-22.
LIANG S H, ZHANG L, ZHOU S Z. Experimental research of mechanics and microscopic on nansha soft soil reinforced with cment-based curing agent [J]. Journal of Guangdong University of Technology, 2015, 32(2): 17-22.
[12] 陈峰, 童生豪, 赖文涛. 海水环境下镍铁渣粉水泥土的抗渗性能[J]. 建筑材料学报, 2022, 25(11): 1190-1194.
CHEN F, TONG S H, LAI W T. Impermeability of cement soil mixed with ferronickel slag powder in seawater environment [J]. Journal of Building Materials, 2022, 25(11): 1190-1194.
[13] 范泽忠. 海水侵蚀作用对水泥土抗拉强度劣化影响研究[J]. 河南科技, 2023, 42(2): 70-74.
FAN Z Z. Study on the influence of seawater erosionn on cement soil tensile strength deteriortion [J]. Henan Science and Technology, 2023, 42(2): 70-74.
[14] 陈峰. 镍铁渣粉对水泥土的强度影响试验研究[J]. 硅酸盐通报, 2018, 37(10): 3113-3118.
CHEN F. Experimental research on the strength of cement soil with nickel iron slag powder [J]. Bulletin of the Chinese Ceramic Society, 2018, 37(10): 3113-3118.
[15] 王洪, 陈伟天, 陈昌礼. 硅灰对高强混凝土强度影响的试验研究[J]. 混凝土, 2011(7): 74-76.
WANG H, CHEN W T, CHEN C L. Experimental reserch on the effect of silica fume to the strength of high-strength concrete [J]. Concrete, 2011(7): 74-76.
[16] 中华人民共和国行业标准. 水泥土配合比设计规程: JGJ/T 233-2011 [S]. 北京: 中国建筑工业出版社, 2011.
[17] 陈金辉. 镍铁渣粉水泥土的固化机理试验研究[J]. 水利与建筑工程学报, 2020, 18(1): 122-127.
CHEN J H. Experimental study on soildification mechanism of nickel iron slag cement soil [J]. Journal of Water Resources and Architectural Engineering, 2020, 18(1): 122-127.
[18] 王文军, 朱向荣, 方鹏飞. 纳米硅粉水泥土固化机理研究[J]. 浙江大学学报(工学版) , 2005, 39(1): 148-153.
WANG W J, ZHU X R, FANG P F. Analysis on reinforcement mechanism of nanometers silica fume reinforced cemented clay [J]. Journal of Zhejiang University(Engineering Science) , 2005, 39(1): 148-153.
[19] DU Y J, JIANG N J, LIU S Y, et al. Engineering properties and microstructural characteristics of cement-stabilized zinc-contaminated kaolin [J]. Canadian Geotechnical Journal, 2014, 51(3): 289-302.
[20] 李妤茜, 乔秀臣. 外部因素对钙矾石晶体结构及其形貌的影响综述[J]. 硅酸盐通报, 2023, 42(1): 31-47.
LI Y X, QIAO X C. Review on influence of external factors on the crystal structure and morphology of ettringite [J]. Bulletin of the Chinese Ceramic Society, 2023, 42(1): 31-47.
[1] 梁仕华, 陈俊涛, 林焕生, 冯德銮, 龚星, 罗庆姿. 水泥固化淤泥废弃土作为填土材料的试验研究[J]. 广东工业大学学报, 2020, 37(02): 102-106.
[2] 梁仕华, 周锦程, 罗祺, 林焕生. 有机质对水泥固化淤泥土的力学特性影响试验研究[J]. 广东工业大学学报, 2019, 36(06): 86-91.
[3] 梁仕华, 罗祺, 王蒙, 刘勇健, 尹应梅, 江志源. 石灰与水泥固化南沙锌污染软土试验研究[J]. 广东工业大学学报, 2017, 34(05): 80-85.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 2017 《广东工业大学学报》编辑部
地址：广州市东风东路729号广东工业大学 邮编：510090
电话：020-37626653,020-37626139,020-37626396
邮箱：xbzrb@gdut.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发