硅酸盐通报2025，Vol.44Issue(9)：3137-3146,10.DOI:10.16552/j.cnki.issn1001-1625.2025.0184
高氯盐加速侵蚀下水泥-水玻璃双液浆结石体耐久性研究
Durability Study of Cement-Sodium Silicate Double Slurry Grout Consolidation Body under Accelerated Erosion by High Chloride Salts
摘要
Abstract
As a grouting material for water plugging and reinforcement,the service performance and degradation mechanism of cement-sodium silicate(C-S)double slurry grout under high chloride salt erosion have not been studied systematically.In this paper,the effects of water-cement ratio(w/c)and water glass concentration on the workability of C-S double slurry grout,the mechanical properties,phase evolution and pore structure of C-S double slurry grout consolidation body(referred to as C-S consolidation body)under high chloride salt curing environment were studied by macroscopic and microscopic tests such as compressive strength,X-ray diffraction(XRD),scanning electron microscope(SEM)and mercury intrusion porosimetry(MIP).The results show that the chemical gelling time of C-S double slurry grout is shortened with the decrease of w/c and water glass concentration in a certain range,and the chemical gelling time is less than 35 s,which meets the demand of rapid water plugging.In the curing environment with chloride concentration greater than 15％(mass fraction),the compressive strength of C-S consolidation body with two optimal mix ratios(w/c of 0.6,water glass concentration of 34° Bé and w/c of 0.7,water glass concentration of 30° Bé)is higher than that of water curing environment before 56 d of curing.In addition,the C-S consolidation bodies of the two optimal mix ratios still show good resistance to chloride salt corrosion after 90 d of curing.Microscopic analysis shows that under high chloride salt concentration,the C-S consolidation body generates Friedel's salt(Fs)in the short-term,and the mechanical properties are improved.However,long-term erosion will lead to decalcification of hydrated calcium silicate(C-S-H)gel and decrease of mechanical properties.关键词
水泥-水玻璃/双液浆/高氯盐/力学性能/孔结构/微观结构Key words
cement-sodium silicate/double slurry grout/high chloride salt/mechanical property/pore structure/microstructure分类
交通工程引用本文复制引用
王倩倩,戴航,王立川,张春瑜,李利平,王海彦,张京京..高氯盐加速侵蚀下水泥-水玻璃双液浆结石体耐久性研究[J].硅酸盐通报,2025,44(9):3137-3146,10.基金项目
中铁十八局集团有限公司科技研发项目(G21-11,23-01-S) （G21-11,23-01-S）
中铁十八局集团隧道工程有限公司科技研发项目(11-JF-2023-引绰济辽-0-001) （11-JF-2023-引绰济辽-0-001）
国家杰出青年科学基金(52025091) （52025091）
