华南理工大学学报(自然科学版) ›› 2020, Vol. 48 ›› Issue (9): 43-50.doi: 10.12141/j.issn.1000-565X.190907

• 土木建筑工程 • 上一篇    下一篇

破碎岩体快速注浆加固地聚合物注浆材料试验研究

冯涵1,2 张学民1,2 欧雪峰3† 张聪4 姜健5 郭腾飞5 周贤舜1,2   

  1. 1. 中南大学 土木工程学院,湖南 长沙 410000; 2. 中南大学 重载铁路工程结构教育部重点实验室,湖南 长沙 410000;3. 长沙理工大学 公路养护技术国家工程实验室,湖南 长沙 410114;4. 中南林业科技大学 土木工程学院,湖南 长沙 410000; 5. 河南理工大学 土木工程学院,河南 焦作 454150
  • 收稿日期:2019-12-18 修回日期:2020-04-03 出版日期:2020-09-25 发布日期:2020-09-01
  • 通信作者: 欧雪峰 (1990-),男,讲师,博士,主要从事隧道及地下空间理论及技术研究。 E-mail:oxfrock@163.com
  • 作者简介:冯涵 (1991-),男,博士,主要从事隧道结构缺陷病害及治理研究。E-mail: fenghan_csu@163. com
  • 基金资助:
    国家自然科学基金资助项目 (51978671); 贵州省科技重大专项 (黔科合重大专项 [2018] 3010); 湖南省教育厅科学研究项目 (19B031); 长沙理工大学公路养护技术国家工程实验室开放基金资助项目

Experimental Study on Geopolymer Grouting Material in Rapid Grouting Reinforcement of Fractured Rock

FENG Han1,2 ZHANG Xuemin1,2 OU Xuefeng3 ZHANG Cong4 JIANG JianGUO TengfeiZHOU Xianshun1,2   

  1. 1. School of Civil Engineering,Central South University,Changsha 410000,Hunan,China;2. MOE Key Laboratory of Heavy-Haul Railway Engineering Structures,Central South University,Changsha 410000,Hunan,China;3. National Engineering Laboratory of Highway Maintenance Technology,Changsha University of Science & Technology,Changsha 410114,Hunan,China;4. School of Civil Engineering,Central South University of Forestry and Technology,Changsha 410000,Hunan,China;5. School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454150,Henan,China
  • Received:2019-12-18 Revised:2020-04-03 Online:2020-09-25 Published:2020-09-01
  • Contact: 欧雪峰 (1990-),男,讲师,博士,主要从事隧道及地下空间理论及技术研究。 E-mail:oxfrock@163.com
  • About author:冯涵 (1991-),男,博士,主要从事隧道结构缺陷病害及治理研究。E-mail: fenghan_csu@163. com
  • Supported by:
    Supported by the National Natural Science Foundation of China (51978671),the Major Scientific and Techno-logical Projects of Guizhou Province ( [2018] 3010) and the Open Fund of National Engineering Laboratory of Highway Mainte-nance Technology (Changsha University of Science & Technology)

摘要: 地聚合物材料本身具有快凝和早期强度高等优点。为进一步探究该材料早期(≤24h) 性能特点及其应用于破碎岩体快速注浆加固中的可能性,以改性水玻璃溶液为激发剂,以偏高岭土内掺矿渣为前驱体,通过正交试验对地聚合物注浆材料的流动度、初凝/终凝时间和析水率等工作性能以及早期 (≤24h) 力学性能等指标进行研究。试验结果表明: 相比传统纯水泥浆液,地聚合物注浆材料具有凝结时间快、流动度高、稳定性好以及结石体早期强度高的优点,可适用于部分快速注浆加固工况中; 当矿渣替代率为 45%,改性水玻璃激发剂模数和浓度分别为 1. 5 和 75% 以及液固比为 1. 5 时,地聚合物综合性能最佳; 矿渣替代率和改性水玻璃激发剂浓度是对浆液影响相对较大的两个主要因素。

关键词: 建筑材料, 注浆, 加固, 地聚合物

Abstract: Geopolymer material itself has the advantages of fast setting and high early strength. In order to further explore the early ( < 24h) performance characteristics of the material and the possibility to apply it in the rapid grouting reinforcement of broken rock mass,the early ( < 24h) mechanical properties and the working performance indicators of geopolymer grouting material,such as fluidity,initial / final setting time and water evolution rate,were studied through the orthogonal test,taking the modified water glass solution as the activator,and the metakao-lin mixed with slag as the precursor. The test results show that,compared with the traditional pure cement slurry,the geopolymer grouting material has the advantages of fast setting time,high fluidity,good stability and early high strength of the stone. It can be applied to some rapid grouting and strengthening conditions. When the replacement rate of mineral powder is 45%,the modulus and concentration of the modified water glass activator are 1. 5 and 75% respectively,and the liquid-solid ratio is 1. 5,the comprehensive performance of geopolymer is the best. The replacement rate of mineral powder and the concentration of modified water glass activator are the two main factors that have relatively large influence on the slurry.

Key words: building materials, grouting, reinforcement, geoploymers