دانلود رایگان مقاله لاتین عملکرد نانوکامپوزیت سیمانی از سایت الزویر
عنوان فارسی مقاله:
سنتز، شناسایی و عملکرد نانوکامپوزیت سیمانی پیزو رسیستیو
عنوان انگلیسی مقاله:
Synthesis, characterisation and performance of piezo-resistive cementitious nanocomposites
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
As the structures are getting older and deteriorated, awareness on the effects of extreme events in civil infrastructure is growing very fast. Research community needs advanced tools to monitor the health condition of the civil structures. Due to the inherent properties of reinforced concrete structures, damage progression inside the structure needs regular monitoring to avoid any catastrophic failure and loss of life and property. Generally, health monitoring of structures is carried out by affixing electric resistance strain gauges on the concrete surface using special type of conductive adhesive. These metal foil strain sensors have some limitations like low gauge factor, field effect, drift due to temperature sensitivity, long term change in foil conductivity and requirement of abundant amount of electric energy for operation. Most of the times, this technique of strain measurement (externally affixing) provides incorrect signals due to undesirable performance of the conductive adhesive and/or the malfunctioning of the electric resistance strain gauge. Hence, there is a need for an alternate and smarter solution to monitor the stress state of structures. Chen and Chung opened a door for the civil engineering community by successfully reinforcing short carbon fiber (0.2e0.4%) into cement matrix to yield smart concrete for non-destructive damage monitoring [1]. Later, the electrical conductivity of carbon fiber incorporated cement composite was used to develop embedded type sensor [2]. Since then, efforts are being made for engineering the cement composite with conductive particles and semi conductive fillers such as carbon coated nickel fiber, brass coated steel fiber, carbon black and various nano-phase materials. Recent advancements in nanotechnology have given a pathwayto develop new cement-based nano-composites which can be used as in-built sensors. Carbon nanotube (CNT) is an infinitesimal sized material which possesses superior morphology, structural stability, electrical conductivity [3] and electro-mechanical property [4]. The emerging field of carbon nano-engineering offers an approach to incorporate or embed CNT element in cementitious matrix by exploiting larger surface area and meso-pore reduction effect [5]. Even small amount of nano-filler (CNT), which has high aspect ratio, can be incorporated as second phase into an insulating matrix to achieve electrically conductive network without any adverse effect on mechanical property of the base composite [6]. Electrical properties, such as resistance and reactance, of these composites can vary with respect to externally applied stress [4]. This property indicates that an ordinary composite matrix can be transformed into a strain sensitive matrix i.e., the matrix with pressure sensitivity (piezoeresistivity sensor) through suitable nanoengineering. As a result, it will not only help in monitoring the overall structural health but will also help in determining the information about microstructural deformation of the matrix [7]. Thus, CNTs can be used as the next generation multi-functional conductive nanofillers to develop smart nano-composites.
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کلمات کلیدی:
piezoresistive properties of cementitious nanocomposites abstract https://www.researchgate.net/...Piezoresistive...Cementitious_Nanocomposites/.../55aaa49... PIEZORESISTIVE PROPERTIES OF CEMENTITIOUS. NANOCOMPOSITES. M.S. Konsta-Gdoutos, E.E. Gdoutos and P.A. Danoglidis. School of Engineering ... [PDF]Synthesis, characterisation and performance of piezo-resistive ... iranarze.ir/wp-content/uploads/2016/11/E2876.pdf Oct 11, 2016 - Synthesis, characterisation and performance of piezo-resistive cementitious nanocomposites. Saptarshi Sasmal. *. , N. Ravivarman, B.S. Sindu. Self Sensing Capability of Multifunctional Cementitious Nanocomposites link.springer.com/content/pdf/10.1007%2F978-3-319-17088-6_47.pdf piezoresistive properties of the material. In this research, the piezoresistive behavior of novel multifunctional cementitious nanocomposites was investigated in ... A carbon nanotube/cement composite with piezoresistive properties ... iopscience.iop.org/0964-1726/18/5/055010 Mar 30, 2009 - This paper studies the piezoresistive property of the CNT/cement .... health monitoring capabilities in ceramic – carbon nanocomposites Novel nanocomposite technologies for dynamic monitoring of ... iopscience.iop.org/article/10.1088/0964-1726/23/4/045023/meta by F Ubertini - 2014 - Cited by 48 - Related articles Azhari F and Banthia N 2012 Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing Cement Concrete Compos. 34 866–73. ScienceDirect Exfoliated graphene nanoplatelet cement-based ... www.elsevier.es/en-revista-ciencia-tecnologia-dos-materiais-395-pdf-S08708312163001... Exfoliated graphene nanoplatelet cement-based nanocomposites as piezoresistive sensors: influence of nanoreinforcement lateral size on monitoring capability. A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors https://www.hindawi.com/journals/js/2012/652438/citations/ Feb 2, 2012 - A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors .... and performance of piezo-resistive cementitious nanocomposites,” ... Nanotechnology in Construction: Proceedings of NICOM5 https://books.google.com/books?isbn=3319170880 Konstantin Sobolev, Surendra P. Shah - 2015 - Technology & Engineering To measure the electrical resistance of the cementitious nanocomposites two digital ... For the piezoresistive behavior of the cement-based nanocomposites the ...
