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Experimental Study of High Performance Synchronous Grouting Materials Prepared with Clay.
Ying Cui1,2, Zhongsheng Tan1,2
1School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China.
Materials (Basel, Switzerland)
|April 3, 2021
Summary
This study explores using excavated clay from shield construction as synchronous grouting material. Modified with epoxy resin, the material shows improved stability and strength, offering a sustainable solution for tunneling.
Area of Science:
- Geotechnical Engineering
- Materials Science
Background:
- Shield construction generates significant excavated soil, posing utilization challenges.
- Current synchronous grouting materials often exhibit poor performance in filling properties, fluidity, and strength.
Purpose of the Study:
- To investigate the feasibility of utilizing shield-excavated clay as synchronous grouting material.
- To develop a high-performance grouting material using red clay modified with epoxy resin.
Main Methods:
- Modification of red clay with waterborne epoxy resin.
- Evaluation of fluidity, stability, and strength of the modified grout.
- Analysis of the cementitious mechanism using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM).
Main Results:
- Epoxy resin addition reduced grout density and enhanced stability, stone rate, and toughness.
- The modified grout demonstrated improved performance characteristics.
- Microstructural analysis revealed combined cement hydration and epoxy resin curing.
Conclusions:
- Epoxy resin modification effectively enhances the properties of excavated clay for synchronous grouting.
- The developed material offers a sustainable and high-performance alternative for shield tunneling applications.
- The polymer film formed by epoxy resin plays a crucial role in binding grout components and clay particles.
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