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Waste Disposal & Sustainable Energy
Waste Disposal & Sustainable Energy  2021, Vol. 3 Issue (2): 155-164    DOI: 10.1007/s42768-021-00072-1
    
Research on the mechanical properties and electrical conductivity of cement mortar based on recycled nano-iron boride
Research on the mechanical properties and electrical conductivity of cement mortar based on recycled nano-iron boride
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摘要： Traditional cement-based materials are being gradually replaced by nanomodified cement-based materials because the traditional materials cannot meet the production needs of modern society. Nano-iron boride (nano-FeB) is a high-performance nanomaterial prepared from waste iron powder during construction. Its one-dimensional structure is similar to that of carbon nanotubes, which makes it a potential candidate for nano-reinforcement materials. In this paper, the effects of different contents of recycled nano-FeB (0%, 0.05%, 0.075%, and 0.1 wt.%, based on cement weight) on the mechanical properties and electrical conductivity of cement mortar were studied. The results showed that the mechanical properties of the composite cement mortar were improved with the addition of nano-FeB. When the content of nano-FeB was 0.075%, the 28 d compressive strength and flexural strength of the composite cement mortar increased by 60.2% and 42.1%, respectively. In addition, a 0.075% nano-FeB content favorably improved the conductivity of cement mortar. Compared with that of the control group, the volume resistivity of the composite cement mortar decreased by one order of magnitude.
关键词： Construction waste iron powder;  Recycled nano-FeB;  Composite cement mortar;  Compressive strength;  Flexural strength;  Electrical conductivity    
Abstract: Traditional cement-based materials are being gradually replaced by nanomodified cement-based materials because the traditional materials cannot meet the production needs of modern society. Nano-iron boride (nano-FeB) is a high-performance nanomaterial prepared from waste iron powder during construction. Its one-dimensional structure is similar to that of carbon nanotubes, which makes it a potential candidate for nano-reinforcement materials. In this paper, the effects of different contents of recycled nano-FeB (0%, 0.05%, 0.075%, and 0.1 wt.%, based on cement weight) on the mechanical properties and electrical conductivity of cement mortar were studied. The results showed that the mechanical properties of the composite cement mortar were improved with the addition of nano-FeB. When the content of nano-FeB was 0.075%, the 28 d compressive strength and flexural strength of the composite cement mortar increased by 60.2% and 42.1%, respectively. In addition, a 0.075% nano-FeB content favorably improved the conductivity of cement mortar. Compared with that of the control group, the volume resistivity of the composite cement mortar decreased by one order of magnitude.
Key words: Construction waste iron powder    Recycled nano-FeB    Composite cement mortar    Compressive strength    Flexural strength    Electrical conductivity
出版日期: 2021-04-09
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Wei HeZhinan JiaoQingxin Zhao

引用本文:

Wei HeZhinan JiaoQingxin Zhao . Research on the mechanical properties and electrical conductivity of cement mortar based on recycled nano-iron boride. Waste Disposal & Sustainable Energy, 2021, 3(2): 155-164.

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https://www.zjujournals.com/wdse/CN/10.1007/s42768-021-00072-1    或    https://www.zjujournals.com/wdse/CN/Y2021/V3/I2/155

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