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碳纤维混凝土水泥净浆在循环荷载作用下的压敏特性研究

Study on pressure-sensitive characteristics of cement paste of carbon fiber reinforced concrete under cyclic load

Material Science and Engineering / 2019,1(1): 1-7 / 2019-12-10 863 806

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• Authors: 董海飞*       程伟     
• Information:

  华新水泥股份有限公司，武汉

• Keywords: J carbon fiber - reinforced cement - based composite; CCCW materials; electrical resistivity; pressure sensitivity 碳纤维水泥基复合材料；CCCW 材料；电阻率；压敏性能
• Abstract: Under the cycle of load, the pressure sensitivity of the cement paste sample containing CCCW(including active chemical substances) was studied. And then the mechanism of pressure sensitivity with different content of carbon fiber treated by surface oxidation was discussed. Finally, the reasons of different pressure sensitivity among three kinds of carbon fiber cement pastes were analyzed. The result showed that: carbon fiber treated by oxidation of concentrated nitric acid and adding CCCW material can improve the resistant stability of the carbon fiber-reinforced concrete (CFRC) under the action of cyclic load. The corresponding relationship between stress and resistance existed with different content of carbon fiber, and it came to the conclusion that when the content of carbon fiber was up to the amount of I.2wt.% cement, the pressure sensitivity was the best. 研究了内掺含活性化学物质的 CCCW 材料及碳纤维表面氧化处理后不同碳纤维掺量下水泥净浆试样在循环荷载作用下的压敏特性，并讨论了其压敏机理，分析了三种碳纤维掺扯下试样压敏性能差异产生的原因。实验结果表明：添加 CCCW 材料和使用经浓硝酸处理后的碳纤维混凝土试样，在循环荷载下其电阻稳定性得到了有效提高，并且不同碳纤维掺量下试样的电阻和应力均存在较好的对应关系，碳纤维掺量为水泥质量的 1.2 % 时，试样的压敏性最好。
• DOI: https://doi.org/10.35534/mse.0101001c
• Cite: 董海飞、程伟．碳纤维混凝土水泥净浆在循环荷载作用下的压敏特性研究［J］．材料科学与工程，2019，1（1）：1-7．