Title:
Study on the Performance of Two-Component Grout in Shield Tunnel (Prepublished)
Author(s):
Kailong Lu, Hao Huang, Lei Wang, and Xudong Chen
Publication:
Materials Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
mechanical properties; microstructure; shield tunnel; ternary cementitious system; two-component grout
DOI:
10.14359/51749128
Date:
8/19/2025
Abstract:
This study focuses on enhancing the durability of two-component grouting materials by incorporating ground granulated blast furnace slag (GGBFS) and replacing cement with industrial waste to reduce environmental pollution. A ternary cementitious system was developed using 30% GGBFS and 10% carbide slag (CS) as partial cement replacements. The research investigates the effects of different water-bentonite ratios, water-binder ratios, and AB component volume ratios on the physical and mechanical properties of the grout, including density, fluidity, bleeding rate, setting time, and strength performance. The microstructural evolution and hydration products were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and thermogravimetric analysis (TGA). The findings provide insights for optimizing the mix design of grouting materials in shield tunneling applications, with a focus on improving performance and sustainability.