Graphene-reinforced cement composites for smart infrastructure systems
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Tarih
2022
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In traditional strategies for structural health monitoring of concrete structures, distributed sensors are commonly utilized to monitor and evaluate the state of the structure. This requires deployment of a large number of sensors to obtain sufficient information that can help the owners and engineers to timely detect anomalies in the structural performance. Considering the challenges, such as high deployment cost, low durability, and weak compatibility, for the use of conventional sensors in the long-term monitoring of concrete structures, self-sensing cement composites with intrinsic strain- and damage-sensing capabilities can be a more practical and sustainable approach for condition monitoring. Although various nano- and microfillers have been used to develop such smart cement composites, graphene and its derivatives have gained significant attention in developing functional cement-based composites over the past decade. Graphene sheets are two-dimensional nanomaterials and offer various advantages such as excellent mechanical properties, ultrahigh specific surface area, and relatively low cost. This chapter provides a comprehensive review on the use of graphene-based nanomaterials in the development of self-sensing cementitious composites. First, different forms of graphene-based nanomaterials are described and their use for self-sensing applications is assessed. Then various techniques for the dispersion of graphene nanomaterials into a cement matrix are discussed, followed by a discussion on the experimental techniques that can be used to assess the quality of dispersion. Also, different methods used for electrical and self-sensing characterization tests of cement composites are described. A summary of earlier studies on self-sensing graphene-reinforced cement composites is provided. Next, the piezoresistive behavior of graphene-reinforced cement composites under applied loads is presented for a mortar composite filled with different types of graphene materials. Finally, opportunities for the use of these self-sensing composites in smart infrastructure applications are discussed and potential challenges are noted. © 2022 Elsevier Inc. All rights reserved.
Açıklama
Anahtar Kelimeler
Dispersion; Electrical; Graphene; Self-sensing; Smart infrastructure
Kaynak
The Rise of Smart Cities: Advanced Structural Sensing and Monitoring Systems
WoS Q Değeri
Scopus Q Değeri
N/A
