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Analysis of pore structures and their relations with strength of hardened cement paste

  • Zhang Wensheng
  • Li Beixing
  • Wang Hongxia
  • Wei Jiangxiong
  • Chen Yimin
Article

Abstract

Three cement samples were prepared, including OPC consisted of 100wt% portland cement, PFA consisted of 70wt% portland cement and 30wt% fly-ash, and CA consisted of 70wt% portland cement and 30wt% modified fly ash. The strength of hardened cement paste of these samples was tested and their pore structures were determined by a mercury intrusion porosimeter. Moreover, the data of the pore structures of three samples were comprehensively analyzed. The relations between the pore structures and the compressive strength of the three samples were studied. The experimental results show that the relations between the porosity determined by the mercury intrusion porosimeter and the compressive strength are not notable, and the total pore surface area, the average pore diameter and the median pore diameter could be used to explain the difference of the strength of the tested samples.

Key words

portland cement fly ash mercury intrusion porosimetry (MIP) pore structures compressive strength 

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References

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    Taylor H F W.Cement Chemistry (2 edition). London: Thomas Telford Press, 1997Google Scholar
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    Hewlett P C.Les’s Chemistry of Cement and Concrete (4edition). London: Arnold 1998Google Scholar
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    Mehta P K, Manmohan D. Pore Size Distribution and Permeability of Hardened Cements Pastes. In:Proceedings of 7 International Congress on the Chemistry of Cement, vol3. France Paris, 1980, 2: 1–5Google Scholar

Copyright information

© Wuhan University of Technology 2005

Authors and Affiliations

  • Zhang Wensheng
    • 1
  • Li Beixing
    • 2
  • Wang Hongxia
    • 1
  • Wei Jiangxiong
    • 1
  • Chen Yimin
    • 1
  1. 1.Research Institute of Cement Science and New Building Material China Building Materials AcademyBeijingChina
  2. 2.Key State Laboratory of Water Conservancy and Hydropower EngineeringWuhan UniversityWuhanChina

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