| 罗润泽,邹品玉,唐小林,金丹,柯国军.碳纳米管砂浆在干湿循环-碳酸化作用下的性能研究[J].南华大学学报(自然科学版),2021,(2):63~69.[LUO Runze,ZOU Pinyu,TANG Xiaolin,JIN Dan,KE Guojun.Study on the Performance of Carbon Nanotube Mortar Under Dry-wet Cycle-carbonation[J].Journal of University of South China(Science and Technology),2021,(2):63~69.] |
| 碳纳米管砂浆在干湿循环-碳酸化作用下的性能研究 |
| Study on the Performance of Carbon Nanotube Mortar Under Dry-wet Cycle-carbonation |
| 投稿时间：2020-12-08 |
| DOI：10. 19431/ j. cnki. 1673-0062. 2021. 02. 009 |
| 中文关键词: 干湿循环 碳酸化侵蚀 多壁碳纳米管 力学性能 碳酸化程度 |
| 英文关键词:dry-wet cycle carbonic acid erosion multi-walled carbon nanotubes mechanical properties degree of carbonation |
| 基金项目:湖南省自然科学基金项目(2019JJ60003) |
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| 中文摘要: |
| 针对水泥基材料抗碳酸化性能的需要,探究了多壁碳纳米管对砂浆抵抗碳酸化侵蚀性能的影响。测定了不同掺量多壁碳纳米管砂浆的力学性能,测试了干湿循环-碳酸化侵蚀后的力学性能、pH值和CaCO3含量变化,并利用XRD和SEM进行了微观表征。实验结果表明:砂浆力学强度随多壁碳纳米管的掺量增加先增大后降低,最佳掺量为0.05%;经过28 d侵蚀后,掺量为0.05%、0.1%的砂浆强度增长幅度依然大于基准组和掺量为0.3%的砂浆;通过测试砂浆的pH值、CaCO3含量表征了干湿循环-碳酸化程度,发现掺量为0.05%的砂浆抗侵蚀性能最佳;由XRD图谱可以得出干湿循环-碳酸化侵蚀产物为膨胀性的CaCO3和Na2CO3·10H2O,由SEM图可以观察到适量的多壁碳纳米管均匀的分布在砂浆中,促进了砂浆的性能。 |
| 英文摘要: |
| In response to the need for the anti-carbonation performance of cement-based materials, the effect of multi-walled carbon nanotubes on the resistance of mortar to carbonation erosion was explored. The mechanical properties of the mortar with different content of multi-walled carbon nanotubes were measured, and the mechanics, pH and CaCO3 content changes after the dry-wet cycle-carbonation erosion were tested, and the microscopic characterization was carried out by XRD and SEM. The experimental results show that the mechanical strength first increased and then decreased with the growing of the amount of multi-walled carbon nanotubes, and the 0.05% mortar has the best performance; After 28 days of erosion, the growth rate of strength of the mortar with 0.05% and 0.1% is still higher than that of the mortar with 0.3%; By testing the pH value and CaCO3 content of the mortar to characterize the degree of dry-wet cycle and carbonation erosion, it found that the mortar with 0.05% has the best erosion resistance; The XRD pattern shows that the dry-wet cycle and carbonation erosion products are expansive CaCO3 and Na2CO3·10H2O. It can be observed from the SEM pattern that an appropriate amount of MWCNTS are uniformly distributed in the mortar, which promotes the performance of the mortar. |
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