Effect of Calcium Carbonate Whisker on Impact Toughness of Precast Concrete

The impact toughness and compressive strength of concrete added with calcium carbonate whisker are studied. It is found that calcium carbonate whisker can significantly improve the impact energy consumption at failure of 55 °C steam cured concrete, but has limited impact on 90 °C steam cured concret...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2021-06, Vol.36 (3), p.374-380
Main Authors: Lü, Linnü, Wang, Yisa, He, Yongjia, Wang, Fazhou, Hu, Shuguang
Format: Article
Language:English
Subjects:
Calcium carbonate
Cementitious Materials
Chemistry and Materials Science
Compressive strength
Energy consumption
Impact strength
Materials Science
Morphology
NMR
Nuclear magnetic resonance
Precast concrete
Reinforced concrete
Toughness
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Summary:The impact toughness and compressive strength of concrete added with calcium carbonate whisker are studied. It is found that calcium carbonate whisker can significantly improve the impact energy consumption at failure of 55 °C steam cured concrete, but has limited impact on 90 °C steam cured concrete. At the same time, SEM, XRD and LF-NMR were used to study the micro morphology, hydration product components and pore structure of the concrete, and the mechanism of the influence of calcium carbonate whisker on the impact toughness and compressive strength of concrete was analyzed.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-021-2419-5