Self-Compacted Concrete with Self-Protection and Self-Sensing Functionality for Energy Infrastructures

Alonso, C.; Puentes, Javier

doi:10.3390/ma13051106

Cited by 13 publications

(4 citation statements)

References 34 publications

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“…Moreover, under the actions of adverse factors such as environmental changes, external loads, and construction, concrete structures inevitably produce damage accumulation and resistance attenuation damage and even lead to catastrophic accidents [ 5 ]. Therefore, the vulnerable parts of the structure should possess multi-functions (real-time health monitoring [ 6 ], self-regulation [ 7 ], self-protection [ 8 ], and so on), such that as a result, the structure can display early warning signs before major disaster events, which is also a research hotspot for scholars around the world.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Hao

Shi

et al. 2023

Materials

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Under the strategies of low-carbon and environmental protection, promoting green technology innovation to achieve carbon neutrality in the construction field has become a universal goal. As the building material with the highest consumption, concrete has gradually begun to transform into a multi-functional and intelligent product. Therefore, the research on carbon fiber-reinforced cement-based composites (CFRCs) is of relative interest. It mainly uses carbon fibers (CFs) with high elasticity, strength, and conductivity to disperse evenly into the concrete as a functional filler, to achieve the intelligent integration of concrete structures and function innovatively. Furthermore, the electrical conductivity of CFRC is not only related to the content of CFs and environmental factors but also largely depends on the uniform dispersion and the interfacial bonding strength of CFs in cement paste. This work systematically presents a review of the current research status of the enhancement and modification mechanism of CFRC and the evaluation methods of CF dispersion. Moreover, it further discusses the improvement effects of different strengthening mechanisms on the mechanical properties, durability, and smart properties (thermoelectric effect, electrothermal effect, strain-sensitive effect) of CFRC, as well as the application feasibility of CFRC in structural real-time health monitoring, thermal energy harvesting, intelligent deformation adjustment, and other fields. Furthermore, this paper summarizes the problems and challenges faced in the efficient and large-scale applications of CFRCs in civil engineering structures, and accordingly promotes some proposals for future research.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Hao

Shi

et al. 2023

Materials

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“…Research on technological methods of imparting electrical conductivity to cementitious concretes is carried out to expand the functional properties of conventional building materials [ 1 , 2 ]. Today, electrically conductive cement materials have become widespread in the construction industry and have been actively studied over the past two decades [ 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…According to paper [ 26 ], the use of soot and multiwall carbon nanotubes promotes a distribution of electrically conductive components in material structure that provides stable electrical characteristics without worsening the physical and mechanical properties [ 1 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Complex Modification on the Impedance of Cement Matrices

et al. 2021

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The research results presented in this article were obtained by joint scientific research on creatingcement materials with reduced impedance. It is known that functional additives added to impart electrically conductive properties have a negative impact on physical and mechanical characteristics of the material. This study suggests using the multiwall carbon nanotubes in the amount of 7% from binder mass as a functional additive. The results obtained prove that the addition of this amount of the modifier does not lead to a significant decrease of strength characteristics. Calcium nitrate in the amount of 1–7% was added in order to level the strength loss and to ensure the effective stable electrical conductivity. The multifunctionality of using this salt has been proven, which is manifested in the anti-frost and anticorrosive effects as well in enhancement of electrical conductivity. The optimal composition of the additive with 7% of carbon nanotubes and 3% of calcium nitrate ensures a reduced electrical impedance of cement matrix. The electrical conductivity was 2440 Ohm, while the decrease of strength properties was within 10% in comparison tothe control sample. The nature of changes in the microstructure were studied to determine the influence of complex modifications that showed significant changes in the morphology of the hydration products. The optimum electrical characteristics of cementitious materials are provided due to the uniform distribution of carbon nanotubes and the formation of a network of interconnected micropores filled with the solution of calcium nitrate that provides additional and stable electrical conductivity over time.

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“…This forced the search for new ways to improve the properties of concrete. Thanks to the development of material engineering, a "new class of concrete" has emerged called fiber-reinforced concrete [10,11]. A high compressive strength, characteristic rheological properties of the fresh concrete mixture and quasi-plastic stress-strain curve are specific for high-performance self-compacting fiber-reinforced concrete (HPSCFRC).…”

Section: Introductionmentioning

confidence: 99%

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix

2020

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With the development of concrete technology, the tendency to combine different materials with each other to achieve a greater efficiency and durability of structures can be observed. In the modern construction industry, various materials and techniques are increasingly being combined in order to achieve e.g., an increased resistance to dynamic impacts of a structure, or an increased scope of work of a selected constructional element, which translates into a significant increase in the energy of destruction. Thus, hybrid elements, known as composite ones, are created, which consist of concrete and reinforcements. This study examined the influence of the preparation of the concrete surface on the behavior of high-performance, self-compacting, fiber-reinforced concrete (HPSCFRC), reinforced with carbon fibers (CF) using a cement matrix. In the general lamination processes, this is preformed using epoxy resin. However, epoxy resin is sensitive to relatively low temperatures, and therefore the authors attempted to use a cement matrix in the lamination process. When connecting hardened concrete with a fresh concrete matrix or mixture, the type of the concrete surface is significant. In this research, three types of concrete surfaces e.g., unprepared, sanded and grinded were considered. All of the surfaces were examined using a 3D laser scanner, to determine the Abbott-Firestone profile material share curve. In this research, cylindrical concrete specimens were reinforced with one, two and three layers of laminates. They were then subjected to a uniaxial compressive test. The results of tests showed that the use of cement matrix in the lamination process, due to its low efficiency, should not be applied when reinforcing concrete elements with a high compressive strength. Moreover, the grinded surface of concrete showed the best cooperation with CF reinforcement.

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Self-Compacted Concrete with Self-Protection and Self-Sensing Functionality for Energy Infrastructures

Cited by 13 publications

References 34 publications

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

Recent Advances in Properties and Applications of Carbon Fiber-Reinforced Smart Cement-Based Composites

The Effect of Complex Modification on the Impedance of Cement Matrices

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix

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