Multi-Response Optimization of Ultrafine Cement-Based Slurry Using the Taguchi-Grey Relational Analysis Method
Shuai Zhang1,2, Weiguo Qiao1,2, Yue Wu1,2
1Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China.
Materials (Basel, Switzerland)
|January 1, 2021
Summary
This study developed an ultrafine cement-based grouting material for underground engineering. Optimal mix proportions were identified using Taguchi-Grey analysis, enhancing strength and microstructure.
Area of Science:
- Geotechnical Engineering
- Materials Science
Background:
- Grouting is crucial for underground engineering, preventing water seepage and reinforcing fractured rock masses.
- Development of advanced grouting materials is essential for improving performance and durability in challenging subterranean environments.
Purpose of the Study:
- To develop and optimize an ultrafine cement-based grouting material.
- To investigate the effects of various additives on the material's properties and microstructure.
- To determine the optimal mix proportion for enhanced performance.
Main Methods:
- Orthogonal experiments were employed to evaluate flow time, viscosity, bleeding, setting time, and uniaxial compressive strength.
- Taguchi-Grey relational analysis was used to determine the optimal mix proportion.
- Scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) were utilized for microstructure analysis.
Main Results:
- The Bingham model effectively described the rheological properties of the ultrafine cement-based slurry.
- Colloidal nanosilica (CNS) and sodium sulfate solution (SS) promoted hydration and improved the hardened slurry's microstructure and strength.
- The optimal mix proportion included a water/solid ratio of 1.0, with 40% ultrafine fly ash (UFA), 0.2% polycarboxylate superplasticizer (SP), 4% CNS, and 4% SS by mass of ultrafine cement (UC).
Conclusions:
- An optimized ultrafine cement-based grouting material was successfully developed.
- The addition of CNS and SS significantly enhances the mechanical properties and microstructure of the grouting material.
- The findings provide valuable insights for the application of advanced grouting materials in underground engineering projects.
Keywords:
Taguchi-Grey relational analysiscolloidal nanosilicamicrostructureorthogonal testsodium sulfateultrafine cement-based slurryMore Related Videos
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