Abstract

This paper reports strategies to design the binder phase of ultra-high performance concretes (UHPC) from commonly available cement replacement (fly ash, slag, microsilica, metakaolin) and fine filler (limestone) materials. A packing algorithm is used to extract the number density, mean centroidal distance, and coordination number of the microstructure. Similarly, rheological studies on the pastes provide yield stress, plastic viscosity, and min-slump spread. The selection criteria involves using the three microstructural and three rheological parameters individually or in combination to define packing and flow coefficients. The selection criteria is flexible enough to allow users modify the constraints depending on the application. In this study, only ternary and quaternary blends, with a total cement replacement of 30% by mass are selected for further characterization. The highly efficient microstructural packing in these mixtures and better workability that facilitated dispersion of particles to enhance the reactivity results in beneficial pore structure and mechanical properties.

Original languageEnglish (US)
JournalCement and Concrete Research
DOIs
StateAccepted/In press - 2017

Fingerprint

High performance concrete
Rheology
Binders
Cements
Coal Ash
Silica fume
Adhesive pastes
Calcium Carbonate
Pore structure
Ointments
Limestone
Fly ash
Slags
Yield stress
Fillers
Viscosity
Plastics
Mechanical properties
Microstructure

Keywords

  • Compressive strength
  • Hydration
  • Microstructure
  • Rheology
  • Ultra-high performance concrete

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

Cite this

Microstructural packing- and rheology-based binder selection and characterization for Ultra-high Performance Concrete (UHPC). / Arora, Aashay; Aguayo, Matthew; Hansen, Hannah; Castro, Cesar; Federspiel, Erin; Mobasher, Barzin; Neithalath, Narayanan.

In: Cement and Concrete Research, 2017.

Research output: Contribution to journalArticle

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AU - Castro, Cesar

AU - Federspiel, Erin

AU - Mobasher, Barzin

AU - Neithalath, Narayanan

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AB - This paper reports strategies to design the binder phase of ultra-high performance concretes (UHPC) from commonly available cement replacement (fly ash, slag, microsilica, metakaolin) and fine filler (limestone) materials. A packing algorithm is used to extract the number density, mean centroidal distance, and coordination number of the microstructure. Similarly, rheological studies on the pastes provide yield stress, plastic viscosity, and min-slump spread. The selection criteria involves using the three microstructural and three rheological parameters individually or in combination to define packing and flow coefficients. The selection criteria is flexible enough to allow users modify the constraints depending on the application. In this study, only ternary and quaternary blends, with a total cement replacement of 30% by mass are selected for further characterization. The highly efficient microstructural packing in these mixtures and better workability that facilitated dispersion of particles to enhance the reactivity results in beneficial pore structure and mechanical properties.

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