A study on the hydration rate of natural zeolite blended cement pastes

Chi Sun Poon, L. Lam, S. C. Kou, Z. S. Lin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

179 Citations (Scopus)

Abstract

Natural zeolite is a type of mineralogical material containing large quantities of reactive SiO2and Al2O3It is widely used in the cement industry in China as a cement blending material. Like other pozzolanic materials such as silica fume and fly ash, zeolite contributes to concrete strength mainly through the pozzolanic reaction with Ca(OH)2, Thus, the pozzolanic reactivity of this type of material in comparison with other pozzolans is of much interest. This paper presents experimental results on the compressive strength, degree of pozzolanic reaction, and porosity of zeolite modified cement pastes. These results are compared with those obtained from similar blended cement pastes prepared with silica fume and fly ash replacements. Based on the experimental results, it can be concluded that natural zeolite is a pozzolanic material, with a reactivity between that of silica fume and fly ash. Generally, in blended cement pastes with a lower water-to-cementitious materials ratio, the natural zeolite contributes more to the strength of the pastes. But in the pastes with a higher water to cementitious ratio and a lower cement replacement level it undergoes a higher degree of reaction.
Original languageEnglish
Pages (from-to)427-432
Number of pages6
JournalConstruction and Building Materials
Volume13
Issue number8
DOIs
Publication statusPublished - 1 Jan 1999

Keywords

  • Cement
  • Degree of hydration and pozzolanic reaction
  • Natural zeolite
  • pfa

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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