Rheological Properties of Alkali Activated Fly Ash Slag Cementitious Materials

LI Shasha; LI Liubei; WU Wei; FENG Hu

doi:10.3969/j.issn.1000-6532.2024.02.005

2024 No. 2

Article Contents

Article navigation > Multipurpose Utilization of Mineral Resources > 2024 > 45(2): 30-35

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LI Shasha, LI Liubei, WU Wei, FENG Hu. Rheological Properties of Alkali Activated Fly Ash Slag Cementitious Materials[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 30-35. doi: 10.3969/j.issn.1000-6532.2024.02.005

Citation:

LI Shasha, LI Liubei, WU Wei, FENG Hu. Rheological Properties of Alkali Activated Fly Ash Slag Cementitious Materials[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(2): 30-35. doi: 10.3969/j.issn.1000-6532.2024.02.005

Rheological Properties of Alkali Activated Fly Ash Slag Cementitious Materials

1.
School of Civil Engineering and Architecture, Zhengzhou College of Economics and Trade, Zhengzhou 450003, Henan, China
2.
Yellow River Conservancy Technical Institute, Engineering Technology Research Center of Small Watershed Conservancy University of Henan Province, Kaifeng 475004, Henan, China
3.
Zhengzhou University, Zhengzhou 450001, Henan, China

Received Date: 08 September 2022

Publish Date: 25 April 2024

Abstract

Abstract

This is an article in the field of ceramics and composites. In order to study the early rheological properties of alkali-activated fly ash-slag cementitious system, the composite pastes with different mass ratios of fly ash (FA) to slag (GGBS) and alkaline activator content were prepared. The fluidity and rheological properties of the pastes were tested by mini-cone slump cone, Brookfield DV3T rheometer,respectively. Finally, the hydration exothermic rate of composite pastes with each ratio was tested by isothermal calorimeter. Results show that when FA/GGBS ratio is 3∶7, the fluidity of paste with 4% NaOH content is the lowest. With the increase of FA mass ratio and NaOH molar mass, the fluidity of alkali-activated FA-GGBS cementitious system increased, and the yield stress and plastic viscosity decreased. The growth of FA content decreases the early hydration rate significantly, while the increase of alkali activator content remarkably increases the peak rate of hydration heat release.
- Ceramics and composites /
- Alkali-activated fly ash-slag cementitious materials /
- Fluidity /
- Rheological properties /
- Thixotropy /
- Hydration heat release rate

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References

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