Effect of HPMC on the Piezoresistivity of Smart Concrete Aggregate with Z Shape
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768 DOI
https: //doi. org/10.1007/s11595-020-2319-0
Effect of HPMC on the Piezoresistivity of Smart Concrete Aggregate with Z Shape WANG Haifeng, YAN Handong, MEI Zhen
(College of Civil Engineering, Huaqiao University, Xiamen 361021, China)
Abstract: Cement mortar with carbon fiber (CFc) and resin-cement mortar with carbon fiber (CFrc) were used as inner and outer cores of smart aggregate with Z shape, respectively, which was used as the basic perception units to prepare smart concrete aggregate with a mosaic structure (SAMS). The hydroxpropyl methylcellulose (HPMC) was taken into consideration to improve the properties of mortar; by using HPMC, the structure of SAMS was optimized and its mechanical and electrical properties were evaluated. The experimental results show that the toughness of mortar could be improved by the complex that formed by epoxy resin, and the effect of HPMC on the flexibility of CFc was greater than that on the flexibility of CFrc; the feasible designing indicates that the CFc-Z core and CFrc-Z core could be used as inner and outer cores of SAMS. When the proposed dosages of HPMC in inner and outer cores are 0.35wt% and 0.2wt%, respectively, it could give an effective prediction for the damage of concrete during the loading process. Key words: smart aggregate; hydroxpropyl methylcellulose (HPMC); smart concrete; piezoresistivity
1 Introduction The concept of building safety and sustainable development policies have been further promoted throughout the world. Researchers have racked their minds and hearts to improve the safety and sustainability of building structure, which is the current advanced trend in modern construction in recent decades. Every year, a large number of natural resources were exploited in repairing or reconstructing for concrete buildings, and a lot of waste gas, waste residue and noise were discharged during this process, which were caused by structural damage; besides this, the safety of people’s lives and property would be threatened by the damage and collapse of concrete buildings[1,2]. Based on these traits, various strategies have been developed to solve this problem. Research and application of smart concrete is one kind of useful methods that can give the prediction for building healthy, which can be used effectively in modern building structures to reduce the safety accidents, prolong the life of concrete buildings, © Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2020 (Received: Aug. 10, 2019; Accepted: Nov. 27, 2019) WANG Haifeng(王海峰):Ph D; Assoc.Prof.; E-mail: [email protected] Funded by the Natural Science Foundation of Fujian Province (No.2016J01241), and the National Natural Science Foundation of China (No.51608212)
and reduce the environmental pollution in the process of building maintenance and reconstruction[3,4]. However, the use of smart aggregate is the core to promote the development of smart concrete (SC)[5-7]. By using of designing, application, and monitoring about the smart aggregates, status ab
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