Calcined clays for low carbon cement : rheological behaviour in fresh Portland cement pastes

Aramburo Varela, Carlos Hernando and Pedrajas, C. and Rahhal, V. and González, M and Talero Morales, Rafael (2019). Calcined clays for low carbon cement : rheological behaviour in fresh Portland cement pastes. "Materials Letters" (n. 239); pp. 24-28. ISSN 0167-577X. https://doi.org/10.1016/j.matlet.2018.12.050.

Description

Title: Calcined clays for low carbon cement : rheological behaviour in fresh Portland cement pastes
Author/s:
  • Aramburo Varela, Carlos Hernando
  • Pedrajas, C.
  • Rahhal, V.
  • González, M
  • Talero Morales, Rafael
Item Type: Article
Título de Revista/Publicación: Materials Letters
Date: March 2019
ISSN: 0167-577X
Subjects:
Freetext Keywords: Calcined clays, Pozzolanic additions, Cement pastes, Rheology
Faculty: E.T.S. de Edificación (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In this paper the rheological behavior of fresh Portland cement pastes mixed with different calcined clays was analyzed. For this purpose, two samples of Portland cement with different mineral composition (one with low C3A and high C3S content and another with low C3S and high C3A) were used combined with different replacement percentages of two calcined clays (two different metakaolin). Grounded a quartz was used as control as well. Both mineral admixtures had different crystallinity and morphology: the a-quartz is fully crystalline while metakaolin is completely amorphous with a very small crystalline fraction giving very high pozzolanic properties in the vitreous state. All determinations were performed in the hydration latency period. The results show that the fresh Portland cement paste with low C3A(%) content and high C3S(%) content present great shear strength and the replacement with calcined clays affects the rheological behavior of the fresh pastes depending on the greater or lower pozzolanic reactivity of the mineral addition.

More information

Item ID: 54065
DC Identifier: http://oa.upm.es/54065/
OAI Identifier: oai:oa.upm.es:54065
DOI: 10.1016/j.matlet.2018.12.050
Official URL: https://www.journals.elsevier.com/materials-letters
Deposited by: Memoria Investigacion
Deposited on: 08 Apr 2019 15:11
Last Modified: 08 Apr 2019 15:11
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