Bulletin of the Chinese Ceramic Society, Volume. 43, Issue 11, 4012(2024)

Mechanical Properties and Pressure Sensitivity of High Strength Cement Concrete Modified by Nano-Carbon Black

YI Biliang1... LI Gengying1,*, WANG Linbin2 and GAO Han3 |Show fewer author(s)
Author Affiliations
  • 1College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China
  • 2Guangzhou Municipal Engineering Testing Co., Ltd., Guangzhou 510520, China
  • 3School of Civil Engineering, Chongqing University, Chongqing 400045, China
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    The high strength cement concrete (HSCC) has excellent mechanical properties and durability, and it is one of the most commonly used construction materials in the key major civil engineering projects. Realizing the pressure sensitivity of HSCC can automatically monitor and test the service capacity of structures, and improve the safety and reliability of buildings. In this paper, HSCC with a 28 d compressive strength of more than 80 MPa was constructed by using micro steel fibers and nano-carbon black (NCB). The effect of NCB content on the mechanical properties and pressure sensitivity of HSCC was studied. The results show that the mechanical properties of HSCC are affected by NCB. The compressive and flexural strength of HSCC with an optimal NCB content of 0.05% of cement mass fraction are about 21.0%~33.0% and 9.6%~33.8% higher than that of the control one, respectively. NCB significantly improves the pressure sensitity of HSCC. The higher the content is, the more significant the pressure sensitivity is, the smaller the noise is, and the better the stability is. The force-electric signal relation follows exponential function relationship and the fitting degree is 0.923. The effect of NCB on the pressure sensitivity of HSCC conforms to the seepage principle, and its seepage threshold is about 0.1%, and the average sensitivity coefficient is increased by 5.0 times.

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    YI Biliang, LI Gengying, WANG Linbin, GAO Han. Mechanical Properties and Pressure Sensitivity of High Strength Cement Concrete Modified by Nano-Carbon Black[J]. Bulletin of the Chinese Ceramic Society, 2024, 43(11): 4012

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    Paper Information

    Category:

    Received: Apr. 19, 2024

    Accepted: Jan. 2, 2025

    Published Online: Jan. 2, 2025

    The Author Email: Gengying LI (ligengying@scau.edu.cn)

    DOI:

    CSTR:32186.14.

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