Research on Properties of MK–CFBCA Mineral Admixtures

  • Guiming Wang
  • Ming Bao
  • Tao Sun
  • Shuxuan Xing
  • Kun Li
Conference paper
First Online:
Part of the RILEM Bookseries book series (RILEM, volume 10)

Abstract

The main characteristic of CFBCA-MK mineral admixtures (MCMAs) is discussed in this paper. Compressive strength, fluidity and volume deformation test are measured for fresh and hardened concrete properties. With 15 % usage of MCMAs, compressive strength of concrete increases 19.13 % and 24.14 % from 3 days to 28 days, respectively, and it can reduce shrinkage of concrete. The results of XRD, TG and IR analysis indicated that circulating fluidized bed combustion desulfurization ash (CFBCA) can provide SO 4 2 – , and metakaolin (MK) mainly provides active Al2O3 and SiO2, which provides conditions for the formation of ettringite (AFt) and C-S-H gel. When the proportion of CFBCA and MK is 3:7, it can generate more AFt and C-S-H gel in the early hydration. It indicates that MCMAs can endow concrete with good early mechanical properties and micro-expansion properties.

Keywords

Compressive Strength Blended Cement Autogenous Shrinkage Hydration Heat Quartz Powder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

This research is financially supported by Yang Fan Innovative & Entrepreneurial Research Team Project (No.201312C12) and self-determined and innovative research funds of WUT (No.155201012).

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Copyright information

© RILEM 2015

Authors and Affiliations

  • Guiming Wang
    • 1
  • Ming Bao
    • 1
  • Tao Sun
    • 1
  • Shuxuan Xing
    • 2
  • Kun Li
    • 3
  1. 1.State Key Laboratory of Silicate Materials for ArchitecturesWuhan University of TechnologyWuhanChina
  2. 2.China United Concrete Beijing Xinhang Co., LtdBeijingChina
  3. 3.Maoming Kaolin Science and Technology CompanyMaomingChina

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