Research on Microstructure of Microcapsule Based Self-healing Cementitious Composites

王险峰; 孙培培; 邢锋; 韩宁旭

doi:10.13409/j.cnki.jdpme.2016.01.017

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Research on Microstructure of Microcapsule Based Self-healing Cementitious Composites

更新时间：2025-12-11

- Research on Microstructure of Microcapsule Based Self-healing Cementitious Composites
- Vol. 36, Issue 1, Pages: 126-131(2016)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2016.01.017
  CLC： U528
- Published：2016
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[1]王险峰,孙培培,邢锋,韩宁旭.微胶囊自修复水泥基材料的微观结构研究[J].防灾减灾工程学报,2016,36(01):126-131.

王险峰, 孙培培, 邢锋, et al. Research on Microstructure of Microcapsule Based Self-healing Cementitious Composites[J]. 2016, 36(1): 126-131.
[1]王险峰,孙培培,邢锋,韩宁旭.微胶囊自修复水泥基材料的微观结构研究[J].防灾减灾工程学报,2016,36(01):126-131. DOI： 10.13409/j.cnki.jdpme.2016.01.017.

王险峰, 孙培培, 邢锋, et al. Research on Microstructure of Microcapsule Based Self-healing Cementitious Composites[J]. 2016, 36(1): 126-131. DOI： 10.13409/j.cnki.jdpme.2016.01.017.

摘要

利用环氧树脂微胶囊制备自修复水泥砂浆

研究微胶囊掺量3%和6%的情况下水泥砂浆的强度修复率

并利用微观结构分析在同一掺量下试样损伤发生时和修复后的结果

结合压汞法、氮吸附法和微观CT测定微胶囊水泥基材料的孔结构特性

同时通过分析自修复砂浆的孔尺寸分布模型

从模型得到的孔结构参数分析砂浆的修复效果。结果表明:在微胶囊掺量从3%6%的砂浆范围内

修复率逐渐提高;在相同掺量的情况下

由氮吸附法测的结果表明损伤试样的累积孔体积小于修复后的;压汞测试的结果得出修复后的累积孔体积大于损伤的;XCT处理结果表明试样损伤的累积孔体积大于修复后的

并且从预测模型得到的孔结构参数表明修复后试样的孔结构得到一定的改善。

Abstract

Self-healing cementitious composites were prepared on the basis of the epoxy microcapsules technology.The healing effect of the cement mortar strength was investigated for the microcapsule contents of 3% and 6%.The microstructure of the specimens before and after healing process was analyzed.The damage to the specimens were introduced by applying compression preloading.The pore structure characteristics including pore size distribution and the pore structure parameters of the self-healing mortar specimens were tested by using MIP（Mercury intrusion porosimetry）

BET and XCT（X-ray computerized tomography）.By analyzing pore size distribution model of the mortar specimens

the healing effect was obtained on the basis of pore structure parameters.The results showed that for microcapsules content of 3% and 6%

the healing rate was gradually increased.The cumulative pore volume of the healed specimen by BET method was less than that of preloaded one before healing;MIP test results showed the cumulative pore volume of the healed specimen was greater than that of preloaded one before healing.XCT results showed that the cumulative pore volume of the healed specimen was greater than that of preloaded one before healing.These results reflect some improvement in pore size characteristic.

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references

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