Hydration and strength development in ternary portland cement blends containing limestone and fly ash or metakaolin

Kirk Vance, Matthew Aguayo, Tandre Oey, Gaurav Sant, Narayanan Neithalath

Research output: Contribution to journalArticleScientificpeer-review

96 Citations (Scopus)

Abstract

This paper reports the influence of limestone particle size and the type of (partial) cement replacement material on hydration and the mechanical properties of cement pastes. Limestone powders having median particle sizes of 0.7, 3, and 15 μm, at OPC replacement levels between 0% and 20% (volume basis), and two other replacement materials of differing reactivity (i.e., Class F fly ash or metakaolin) at replacement levels between 0% and 10% (volume basis), are used to proportion ternary binder formulations. Fine limestone accelerates early-age hydration, resulting in comparable or better 1-day compressive strengths, and increased calcium hydroxide (CH) contents as compared to pure cement pastes. The incorporation of metakaolin in conjunction with limestone powder alters the heat release (i.e., kinetic) response significantly. A ternary blend of this nature, with 20% total cement replacement demonstrates the highest 1-day strength and lowest CH content. Thermal analysis reveals distinct peaks corresponding to the formation of the carboaluminate phases after 28 days in the limestone–metakaolin modified pastes, whereas the incorporation of similar levels of fly ash does not change the response markedly. It is shown that the synergistic effects of limestone and metakaolin incorporation results in improved properties at early ages, while maintaining later age properties similar to that of traditional OPC systems.
Original languageEnglish
Pages (from-to)93-103
JournalCement and Concrete Composites
Volume39
DOIs
Publication statusPublished - May 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Coal Ash
Calcium Carbonate
Portland cement
Limestone
Fly ash
Hydration
Cements
Ointments
Calcium Hydroxide
Hydrated lime
Powders
Particle size
Thermoanalysis
Compressive strength
Binders
Mechanical properties
Kinetics

Keywords

  • limestone
  • metakaolin
  • fly ash
  • isothermal calorimetry
  • carboaluminates

Cite this

Vance, Kirk ; Aguayo, Matthew ; Oey, Tandre ; Sant, Gaurav ; Neithalath, Narayanan. / Hydration and strength development in ternary portland cement blends containing limestone and fly ash or metakaolin. In: Cement and Concrete Composites. 2013 ; Vol. 39. pp. 93-103.
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abstract = "This paper reports the influence of limestone particle size and the type of (partial) cement replacement material on hydration and the mechanical properties of cement pastes. Limestone powders having median particle sizes of 0.7, 3, and 15 μm, at OPC replacement levels between 0{\%} and 20{\%} (volume basis), and two other replacement materials of differing reactivity (i.e., Class F fly ash or metakaolin) at replacement levels between 0{\%} and 10{\%} (volume basis), are used to proportion ternary binder formulations. Fine limestone accelerates early-age hydration, resulting in comparable or better 1-day compressive strengths, and increased calcium hydroxide (CH) contents as compared to pure cement pastes. The incorporation of metakaolin in conjunction with limestone powder alters the heat release (i.e., kinetic) response significantly. A ternary blend of this nature, with 20{\%} total cement replacement demonstrates the highest 1-day strength and lowest CH content. Thermal analysis reveals distinct peaks corresponding to the formation of the carboaluminate phases after 28 days in the limestone–metakaolin modified pastes, whereas the incorporation of similar levels of fly ash does not change the response markedly. It is shown that the synergistic effects of limestone and metakaolin incorporation results in improved properties at early ages, while maintaining later age properties similar to that of traditional OPC systems.",
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Hydration and strength development in ternary portland cement blends containing limestone and fly ash or metakaolin. / Vance, Kirk; Aguayo, Matthew; Oey, Tandre; Sant, Gaurav; Neithalath, Narayanan.

In: Cement and Concrete Composites, Vol. 39, 05.2013, p. 93-103.

Research output: Contribution to journalArticleScientificpeer-review

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