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Mechanical Properties and Freeze–Thaw Durability of Basalt Fiber Reactive Powder Concrete

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

by 1,*, 1,2, 1,3, 1 and 1,4
Department of Materials, Mechanics, Management & Design, Faculty of Civil Engineering and Geoscience, Delft University of Technology, 2628 CN Delft, The Netherlands
National Engineering Laboratory for Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China
School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
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;
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
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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.

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.

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.

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