Next Article in Journal
Vibration Reduction Strategy for Offshore Wind Turbines
Next Article in Special Issue
Properties of Foamed Lightweight High-Performance Phosphogypsum-Based Ternary System Binder
Previous Article in Journal
Improving Pressure–Velocity Limit of Mechanical Seal with Polycrystalline Diamond Coating
Previous Article in Special Issue
Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete
Article

A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete

by 1,*, 1,2, 1,3, 1 and 1,4
1
Department of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The Netherlands
2
National Engineering Laboratory for Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China
3
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
4
Magnel Laboratory for Concrete Research, Department of Structural Engineering, Ghent University, 9052 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(17), 6092; https://doi.org/10.3390/app10176092
Received: 17 August 2020 / Revised: 30 August 2020 / Accepted: 31 August 2020 / Published: 2 September 2020
(This article belongs to the Special Issue High-Performance Eco-Efficient Concrete)
Alkali-activated slag and fly ash (AASF) materials are emerging as promising alternatives to conventional Portland cement. Despite the superior mechanical properties of AASF materials, they are known to show large autogenous shrinkage, which hinders the wide application of these eco-friendly materials in infrastructure. To mitigate the autogenous shrinkage of AASF, two innovative autogenous-shrinkage-mitigating admixtures, superabsorbent polymers (SAPs) and metakaolin (MK), are applied in this study. The results show that the incorporation of SAPs and MK significantly mitigates autogenous shrinkage and cracking potential of AASF paste and concrete. Moreover, the AASF concrete with SAPs and MK shows enhanced workability and tensile strength-to-compressive strength ratios. These results indicate that SAPs and MK are promising admixtures to make AASF concrete a high-performance alternative to Portland cement concrete in structural engineering. View Full-Text
Keywords: alkali-activated concrete; shrinkage; cracking; internal curing; metakaolin alkali-activated concrete; shrinkage; cracking; internal curing; metakaolin
Show Figures

Figure 1

MDPI and ACS Style

Li, Z.; Yao, X.; Chen, Y.; Lu, T.; Ye, G. A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete. Appl. Sci. 2020, 10, 6092. https://doi.org/10.3390/app10176092

AMA Style

Li Z, Yao X, Chen Y, Lu T, Ye G. A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete. Applied Sciences. 2020; 10(17):6092. https://doi.org/10.3390/app10176092

Chicago/Turabian Style

Li, Zhenming, Xingliang Yao, Yun Chen, Tianshi Lu, and Guang Ye. 2020. "A Low-Autogenous-Shrinkage Alkali-Activated Slag and Fly Ash Concrete" Applied Sciences 10, no. 17: 6092. https://doi.org/10.3390/app10176092

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop