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标题:Understanding the roles of activators towards setting and hardening control of alkali-activated slag cement
时间:2020-02-14 23:31:37
DOI:10.1016/j.compositesb.2019.04.024
作者:[;Ning;Li
关键词:Alkali-activated;cements;Setting;Compressive;strength;Hydration;Na;CO
摘要:Sodium silicate-activated slag often gives high early strength but sets too rapidly. Commercial retarders for Portland cement and partial replacement …
大小:2191 kb
页数:13 PAGES
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目录:
  • Understanding the roles of activators towards setting and hardening control of alkali-activated slag cement
    • 1 Introduction
    • 2 Materials and methods
      • 2.1 Raw materials
      • 2.2 Mixture proportions and sample preparation
      • 2.3 Testing procedure
        • 2.3.1 Nuclear magnetic resonance (NMR) test
        • 2.3.2 Setting time
        • 2.3.3 Compressive strength
        • 2.3.4 Heat release of reaction
        • 2.3.5 Pore solution analysis
        • 2.3.6 Mercury intrusion porosimetry (MIP) analysis
        • 2.3.7 SEM analysis
    • 3 Results and discussions
      • 3.1 29Si NMR analysis of activators
      • 3.2 Normal consistency, setting times and compressive strength
        • 3.2.1 Water requirement for normal consistency
        • 3.2.2 Initial and final setting time
        • 3.2.3 Compressive strength
      • 3.3 Heat evolution
      • 3.4 Pore solution chemistry
      • 3.5 Pore structure
      • 3.6 Backscattered scanning electron microscopy (BSEM) observation and analysis
      • 3.7 Relationship between compressive strength, reaction degree and porosity
    • 4 Conclusions
    • Acknowledgements
    • Appendix A Supplementary data
    • References

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