山东大学学报 (工学版) ›› 2022, Vol. 52 ›› Issue (1): 66-73.doi: 10.6040/j.issn.1672-3961.0.2021.106
• • 上一篇
夏冲1,李传贵2,冯啸1*,赵宏魁2,张思峰1,武剑峰2
XIA Chong1, LI Chuangui2, FENG Xiao1*, ZHAO Hongkui2, ZHANG Sifeng1, WU Jianfeng2
摘要： 为解决传统注浆材料在大体积充填注浆时成本高、固废材料利用低、凝胶时间控制不精确等问题,提出水泥粉煤灰-改性水玻璃注浆材料。通过室内试验分析改性水玻璃配比、改性水玻璃体积分数和粉料比例对浆液初凝时间、终凝时间、流动度及单轴抗压强度的影响规律;通过工程现场试验,研究该注浆材料的可泵性、操作性,利用物理探测方法,对注浆治理效果进行评价。结果表明,水泥粉煤灰-改性水玻璃注浆材料的初凝时间为8~70 s、终凝时间为2~9 min;初凝时间随改性水玻璃体积分数的增加而增长,终凝时间随改性水玻璃体积分数的增加而缩短;凝胶时间与粉料中粉煤灰的质量分数呈正比;浆液流动度与改性水玻璃体积分数及粉料中粉煤灰质量分数成正比;粉煤灰质量分数与浆液结石体抗压强度呈负相关,改性水玻璃体积分数(水泥粉煤灰浆液与改性水玻璃体积之比)为1∶0.6或1∶0.4时,水泥粉煤灰-改性水玻璃注浆材料固结体的7 d抗压强度达到峰值9.35 MPa和6.86 MPa;水泥粉煤灰-改性水玻璃注浆材料可提高固废利用率,且各性能满足注浆需要,在实际应用中可依据工程要求调整配比,为类似的注浆工程提供参考。
中图分类号:
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| [1] | 刘健,胡南琦,徐宝军,岳秀丽,齐泊良,仲奇. 水泥基土石坝防渗注浆材料试验[J]. 山东大学学报(工学版), 2018, 48(2): 39-45. |
| [2] | 冯啸1，张乐文1*，刘人太1，张崇高2，孙子正1，张伟杰1. 碱土加固注浆材料试验及其工程应用[J]. 山东大学学报(工学版), 2013, 43(6): 65-71. |
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