Study on Toughening Cement-Based Composites with CaCO3 Whisker and Fiber

Ming Li Cao; Hang Yao

doi:10.4028/www.scientific.net/AMR.287-290.1149

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 287-290Study on Toughening Cement-Based Composites with...

Study on Toughening Cement-Based Composites with CaCO₃ Whisker and Fiber

Abstract:

Low tensile strength and high brittleness are the inherent defects of cement-based composites. So improving the toughness effectively is an urgent need for developing high-performance cement materials. The aim of this study is to study the toughening effect by mixing CaCO₃ whiskers and polypropylene fibers in cement mortar. The results showed that CaCO₃ whiskers could increase the split tensile strength of cement mortar of 28d age by 26.2% at maximum with the whisker content of 10wt.%; when CaCO₃ whiskers content was 10wt.% and polypropylene fibers content was 0.20vol.%, the split tensile strength of cement mortar was increased by 21.1% at 28d age; when the fiber length was 19mm, the composite toughening effect of whiskers and fibers was more effective. The toughening mechanisms of CaCO₃ whiskers and polypropylene fibers in cement mortar were also discussed.

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Periodical:

Advanced Materials Research (Volumes 287-290)

Pages:

1149-1154

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.287-290.1149

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Online since:

July 2011

Authors:

Ming Li Cao, Hang Yao

Keywords:

CaCO₃ Whisker, Cement Mortar, Polypropylene (PP) Fiber, Split Tensile Strength, Toughening Mechanism

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