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Effect of the water/binder ratio on the hydration process of Portland cement pastes with silica fume and metakaolin

Author(s): ORCID
ORCID
ORCID
ORCID
Medium: journal article
Language(s): Portuguese
Published in: Revista IBRACON de Estruturas e Materiais, , n. 1, v. 15
DOI: 10.1590/s1983-41952022000100005
Abstract:

The microstructure of cement pastes is important to understand the effect of some parameters in the hydration process. In this context, this study had as objective to evaluate the effect of different water/binder (w/b) ratios in the hydration process of cementitious pastes produced with and without incorporation of silica fume and metakaolin. The pastes were obtained with water/binder ratios of 0.3, 0.4 e 0.5, with replacement, by weight, of Portland cement for silica fume and metakaolin, in the contents of 10% and 20%, respectively. It was performed the X-ray diffraction test of the pastes in the ages of 1, 3, 7, and 28 days, to evaluate the hydration evolution of the cementitious materials. According to the results obtained, it was observed that the cementitious pastes presented similar mineralogical phases, except for the pastes containing metakaolin due to the formation of new aluminate phases. With the increase of the water/binder ratio, the pozzolanic reactions and hydration occurred in greater proportion, standing out the metakaolin with greater reactivity.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.1590/s1983-41952022000100005.
  • About this
    data sheet
  • Reference-ID
    10627597
  • Published on:
    02/09/2021
  • Last updated on:
    02/09/2021
 
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