点击次数：

论文类型：期刊论文

发表时间：2017-11-05

发表刊物：COMPOSITES PART B-ENGINEERING

收录刊物：Scopus、SCIE、EI

卷号：129

页面范围：221-232

ISSN号：1359-8368

关键字：Multi-layer graphene; Cementitious composites; Compressive stress; Electrical resistivity; Piezoresitivity; Thermal-resistance effect; Electromagnetic property

摘要：This paper is aimed at studying mechanical property, electrical property, piezoresistive effect, thermal resistance effect and electromagnetic property of the cementitious composites filled with different content of multi-layer graphenes (MLGs). Results demonstrated that the compressive strength and elastic modulus of cementitious composites filled with MLGs increased 54% and 50%, respectively. The percolation threshold of electrical resistivity of cementitious composites filled with MLGs is nearly 2 vol %. Cementitious composites filled with MLGs possess sensitive piezoresistive effect and stable responsibility to cyclic quasi static and dynamic loading conditions. The electrochemical impedance spectroscopy and equivalent circuit were used to analyze the conductive mechanism of the cementitious composites filled with MLGs. The sensitivity of thermal-resistance effect of the cementitious composites filled with MLGs presents a decreasing trend with the increase of MLG content. The best shielding effectiveness of cementitious composites filled with MLGs is 1.6 times of that of cementitious composites without MLGs. The highest electromagnetic wave absorbing performance of cementitious composites filled with MLGs is -33 dB, which is nearly 7 times of that of cementitious composites without MLGs. (C) 2017 Elsevier Ltd. All rights reserved.