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The electrically conductive carbon nanotube (CNT)/cement composites for accelerated curing and thermal cracking reduction

机译：导电碳纳米管（CNT）/水泥复合材料，用于加速固化和减少热裂

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摘要

A functional cementitious composite for smart structures has attracted much attention due to their potential possibilities of application. In this paper, the accelerated curing and thermal cracking reduction with carbon nanotube (CNT)/cement composites are studied experimentally and theoretically. The heating element was fabricated by incorporation CNT into cement, and the cementitious composite block was placed in the middle of mortar samples. In order to generate and evaluate the heating performance, copper wires connected to the composite block were extended to a DC power supply. The variations of material characteristics including curing, thermal, electrical and mechanical properties of both the composite block and the sample were investigated. The experimental test results showed that the proposed curing was capable of improving the compressive strength by 40% at 24 h. In addition, based on the experimentally obtained material constants, a series of thermal analysis of mitigation level of thermal crack in larger scale were carried out. The electrically conductive CNT/cement composite block was found to be applicable to the cement mortar curing and reduction of thermal cracking of massive concretes structures. (C) 2016 Elsevier Ltd. All rights reserved.
机译：用于智能结构的功能性胶结复合材料因其潜在的应用前景而备受关注。本文通过理论和实验研究了碳纳米管/水泥复合材料的加速固化和热裂纹的还原。通过将CNT掺入水泥中来制造加热元件，并将水泥基复合块放置在砂浆样品的中间。为了产生和评估加热性能，将连接到复合块的铜线扩展到直流电源。研究了复合材料块和样品的材料特性变化，包括固化，热，电和机械性能。实验测试结果表明，所提出的固化方法能够在24小时内将抗压强度提高40％。另外，根据实验获得的材料常数，进行了一系列较大规模的热裂纹缓解水平的热分析。发现导电CNT /水泥复合块可用于水泥砂浆固化和减少大体积混凝土结构的热裂。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Composite Structures》 |2016年第12期|20-29|共10页
  • 作者

    Kim G. M.; Yang B. J.; Ryu G. U.; Lee H. K.;

  • 作者单位

    Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Daehak Ro 291, Daejeon 34141, South Korea;

    Korea Inst Sci & Technol, Inst Adv Composite Mat, Multifunct Struct Composite Res Ctr, Chudong Ro 92, Jeonbuk 55324, South Korea;

    Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Daehak Ro 291, Daejeon 34141, South Korea;

    Korea Adv Inst Sci & Technol, Dept Civil & Environm Engn, Daehak Ro 291, Daejeon 34141, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Joule heating characteristics; Carbon nanotube; Cementitious composites; Accelerated curing; Thermal analysis;

    机译：焦耳热特性碳纳米管胶凝复合材料加速固化热分析;

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