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Microstructure and composition of hydration products of ordinary Portland cement with ground steel-making slag

  • Li Yong-xin
  • Chen Yi-min
  • Zhang Hong-tao
  • He Xing-yang
  • Wei Jiang-xiong
  • Zhang Wen-sheng
Article

Abstract

The effect of ground steel-making slag on microstructure and composition of hydration products of ordinary Portland cement (OPC) was investigated by mercury intrusion porosimetry (MIP), X-ray diffraction (XRD) and differential thermal analysis (DTA). Results show that ground steel-making slag is a kind of high activity mineral additives and it can raise the longer-age strength of OPC mortar. The total porosity and average pore diameter of OPC paste with ground steel-making slag increase with the increase of the amount of ground steel-making slag replacing OPC at various ages, while after 28 days most pores in OPC paste with ground steel-making slag do not influence the strength because the diameter of those pores is in the rang of 20 to 50 nm. The hydration mechanism of ground steel-making slag is similar to that of OPC but different from that of fly ash and blast furnace slag. The hydration products of ground steel-making slag contain quite a lot of Ca(OH)2 in long age.

Key words

ground steel-making slag microstructure composition hydration products 

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Copyright information

© Editorial Office of Journal of Wuhan University of Technology-Materials Science Edition 2003

Authors and Affiliations

  • Li Yong-xin
    • 1
  • Chen Yi-min
    • 1
  • Zhang Hong-tao
    • 1
  • He Xing-yang
    • 1
  • Wei Jiang-xiong
    • 1
  • Zhang Wen-sheng
    • 1
  1. 1.Cement InstituteChina Building Material AcademyBeijing

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