Effects of silica aerogel inclusion on the stability of heat generation and heat-dependent electrical characteristics of cementitious composites with CNT

被引：36

作者：

Jang, Daeik ^{[1
]}

Yoon, H. N. ^{[1
]}

Seo, Joonho ^{[1
]}

Lee, H. K. ^{[1
]}

Kim, G. M. ^{[2
]}

机构：

[1] Korea Adv Inst Sci & Technol KAIST, Dept Civil & Environm Engn, 291 Daehak Ro, Daejeon 34141, South Korea

[2] Korea Inst Geosci & Mineral Resources, Mineral Resources Div, Ctr Carbon Mineralizat, 124 Gwahak Ro, Daejeon 34132, South Korea

来源：

CEMENT & CONCRETE COMPOSITES | 2021年 / 115卷

基金：

新加坡国家研究基金会;

关键词：

Carbon nanotube; Silica aerogel; Cementitious composite; Heating material; Heat-generation; Heat-dependent electrical characteristic; CARBON NANOTUBE; CONCRETE; FIBER; DISPERSION;

D O I：

10.1016/j.cemconcomp.2020.103861

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The present study investigated the effects of silica aerogel inclusion on the stability of heat generation and heat-dependent electrical characteristics of cementitious composites with carbon nanotube (CNT). The heat generation and heat-dependent electrical characteristics of the specimens were explored under the monotonic and cyclic heating conditions and they were discussed in terms of compressive strength and SEM test results. The test results indicated that the addition of the silica aerogel improved the stability of heat generation and changes in the electrical resistivity of up to 63% and 68%, respectively, upon 20 cycles of the heating tests. The enhancement in the electrical properties is attributed to the fact that the incorporated silica aerogel mitigated the re-distribution of CNT particles due to hydration reaction during the heating process, which in turn improved the stability of heat generation and heat-dependent electrical characteristics of the cementitious composites.

引用

页数：7

共 41 条

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