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Compression sensibility of magnetic-concentrated fly ash mortar under uniaxial loading

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Abstract

The electrical conductivity, compression sensibility, workability and cost are factors that affect the application of conductive smart materials in civil structures. Consequently, the resistance and compression sensibility of magnetic-concentrated fly ash (MCFA) mortar were investigated using two electrode method, and the difference of compression sensibility between MCFA mortar and carbon fiber reinforced cement (CFRC) under uniaxial loading was studied. Factors affecting the compression sensibility of MCFA mortar, such as MCFA content, loading rate and stress cycles, were analyzed. Results show that fly ash with high content of Fe3O4 can be used to prepare conductive mortar since Fe3O4 is a kind of nonstoichiometric oxide and usually acts as semiconductor. MCFA mortar exhibits the same electrical conductivity to that of CFRC when the content of MCFA is more than 40% by weight of sample. The compression sensibility of mortar is improved with the increase of MCFA content and loading rate. The compression sensibility of MCFA mortar is reversible with the circling of loading. Results show that the application of MCFA in concrete not only provides excellent performances of electrical-functionality and workability, but also reduces the cost of conductive concrete.

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Authors and Affiliations

  1. School of Materials Science & Engineering, Chongqing University, Chongqing, 400045, China

    Xingwen Jia  (贾兴文), Yajie Zhang & Jueshi Qian

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  1. Xingwen Jia  (贾兴文)
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  2. Yajie Zhang
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  3. Jueshi Qian
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Correspondence to Xingwen Jia  (贾兴文).

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Funded by the National Natural Science Foundation of China (No. 51002193)

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Jia, X., Zhang, Y. & Qian, J. Compression sensibility of magnetic-concentrated fly ash mortar under uniaxial loading. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 27, 999–1003 (2012). https://doi.org/10.1007/s11595-012-0588-y

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  • DOI: https://doi.org/10.1007/s11595-012-0588-y

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