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Effect of CF and RPP on the Mechanical and Electrical Properties of Smart Aggregate

  • Cementitious Materials
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Abstract

By using redispersible polymer powder (RPP) and carbon fiber (CF) to adjust the flexibility and electrical properties of the smart aggregate, a new kind of smart aggregate with Z type structure was proposed. The study shows that Z type aggregate is more sensitive to the feedback of external force than the prism aggregate in the same loading environment, and it indicates that Z type aggregate is more suitable for the research and application of concrete health monitoring. Although the incorporation of RPP would cause the compressive strength of the aggregates and the elastic modulus of hardened cement mortar to reduce slightly within the dosage of RPP by 2.25% because of the polymer film formed in the internal system, this would improve the deformability of the aggregates. In the early loading stage (in the first 60 seconds), the intelligent concrete specimens implanted with Z type smart aggregate do not show higher sensitivity as expected, although the resistance change rate changes a little bit more, the overall of it is still in balance. Adding RPP could improve the flexibility of smart aggregates exactly, and it plays an active role in prolonging the life of the smart aggregates. By implanting Z type aggregates the damage and failure of the concrete structure could be predicted accurately in this study. The results of this paper will help to promote further research and application of intelligent concrete.

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Acknowledgements

The above-described investigation was supported by the Fund from Natural Science Foundation of Fujian Province (No. 2016J01241), the National Natural Science Foundation of China (No. 51608212) and the Science & Technology Pillar Program of Fujian Provincial Education Department (No. Z1425072). The authors also thank the anonymous reviewers for their invaluable comments and suggestions to improve the quality of the paper.

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Authors and Affiliations

  1. College of Civil Engineering, Huaqiao University, Xiamen, 361021, China

    Haifeng Wang  (王海峰) & Zhen Mei

Authors
  1. Haifeng Wang  (王海峰)
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  2. Zhen Mei
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Correspondence to Haifeng Wang  (王海峰).

Additional information

Funded by the Natural Science Foundation of Fujian Province (No.2016J01241), the National Natural Science Foundation of China (No.51608212), and the Science & Technology Pillar Program of Fujian Provincial Education Department( No.JA14024)

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Wang, H., Mei, Z. Effect of CF and RPP on the Mechanical and Electrical Properties of Smart Aggregate. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 437–444 (2018). https://doi.org/10.1007/s11595-018-1842-7

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  • DOI: https://doi.org/10.1007/s11595-018-1842-7

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