Effect of Microstructure on the Properties of High Strength Hardened Cement Paste(I)

고강도 시멘트 경화체의 특성에 미치는 미세구조의 영향(I)

  • Published : 1990.07.01

Abstract

Investigation for the preparation of high strength hardened cement paste using ordinary portland cement, hydroxypropyl methyl cellulose(HPMC) with SiC powder was carried out. The cement paste was mixed with 0.1 of water cement ratio by twin roll mill and cured 60 days in humidity chamber. The hydration degree of cement paste cured with W/C=0.1 in 60 days was about 30% and most pores in the paste were found to be existed as gel pores of diameter less than 0.01㎛. The maximum flexural strength of hardened cement paste was about 960kg/㎠. When the SiC powder was added to the paste, the flexural strength was 1000∼1100kg/㎠ and the Young's modulus was 8∼9×105kg/㎠.

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References

  1. MRS Proceedings v.42 Very High Strength Cement-Based Materials J. Francis Young
  2. Phil. Trans. R. Soc. Lond v.A310 The Relation Between Porosity, Microstructure and Strength, and the Approach to Advanced Cement-Based Materials J.D. Birchall;A.J. Howard;K. Kendall
  3. J. of Mat. Sci. v.20 High Strength Cement Pastes : Part Ⅰ Microstructures W. Sinclair;G.W. Groves
  4. 한국요업학회지 v.27 no.4 고강도 시멘트 경화체의 특성에 미치는 혼합재의 영향 김정환;한기성
  5. European Patent Publication, No.0021682 J.D. Bircall;A.J. Howard;K. Kendall
  6. 8th. Inter. Cong Chem. Cem. v.Ⅳ no.323 Pore Structure Permeability and Diffusivity of Hardened Cement Pastes and Concrete in Relation to Durability R.E. Oberholster
  7. Cem. Concr. Res. v.12 no.349 Physical Properties of High Strength Cement Pastes N. McN Alford;G.W. Groves;D.D. Double
  8. Nature v.289 no.388 Flexural Strength and Porosity of Cements J.D. Birchall;A.J. Howard;K. Kendall
  9. 한국요업학회지 v.26 no.5 고강도 시멘트 경화체의 특성에 미치는 수용성 폴리머의 영향 김정환;최상흘;한기성
  10. J. of Mat. Sci. v.20 High Strength Cement Pastes : Part Ⅱ. Relations during Setting S A. Rodger;W. Sinclair;S.A. Brooks;A. Groves
  11. J. of Mat. Sci. v.19 On the Factors Affecting Strength of Portland Cement N.B. Eden;J.E. Bailey