Electromechanical properties of multi-reinforced self-sensing cement-based mortar with MWCNTs, CFs, and PPs

Thomoglou, Athanasia K.; Falara, Maria G.; Voutetaki, Maristella E.; Fantidis, J. G.; Tayeh, Bassam A.; Chalioris, Constantin E.

doi:10.1016/j.conbuildmat.2023.132566

Cited by 18 publications

(11 citation statements)

References 25 publications

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“…The construction material itself, forming structures and infrastructures, can serve as a strain sensor for assessing building performance and integrity conditions. Furthermore, it can identify cracks or incipient damages caused by exceptional events or variations in usage [24,25]. The existing literature predominantly explores cement-based matrices (such as cement pastes or mortars) and small-sized samples [26][27][28].…”

Section: State-of-the-artmentioning

confidence: 99%

Mechanical and Durability Investigation of Composite Mortar with Carbon Microfibers (CMF)

D’Alessandro,

Ubertini

2024

Applied Sciences

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This paper investigates the mechanical properties and the durability implications of innovative cement-based mortars doped with carbon microfibers. In particular, mixes with different amounts of carbon additions are produced, and the properties of fresh and hardened samples are analyzed through workability, water absorption, and compressive and flexural tests under specific environmental conditions. These composites can be employed to enhance construction performance or provide structures with strain-monitoring capabilities. However, the analysis of their mechanical properties and their durability behavior is needed before extensive structural use. In this work, the preparation procedure is defined for the various mix designs, considering different amounts of carbon microfibers; then, fresh properties are evaluated, and different types of samples formed. After various curing times, the specific rheological and hardened properties of the specimens are tested in different conditions to consider the durability of the composites, essential for the real-scale adoption in structural elements. Preliminary electrical and sensing tests are first conducted to evaluate the monitoring potential of the investigated composites. The findings highlight the impact of carbon inclusions on the performance of cement-based mortars, offering valuable insights for their utilization in masonry construction or for repairing concrete structures. In particular, sensing capabilities are found to be highly enhanced by the presence of CMF. Additionally, the results of this research pinpoint key areas for further analysis in the material’s development process.

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Section: State-of-the-artmentioning

confidence: 99%

Mechanical and Durability Investigation of Composite Mortar with Carbon Microfibers (CMF)

D’Alessandro,

Ubertini

2024

Applied Sciences

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“…Research conducted by Thomoglou et al [441] suggests that the optimal amount of CNTs in cement mortar can provide improvements in various mechanical properties. Specifically, it was found that the incorporation of 0.2 wt% MWCNTs resulted in an increase in flexural strength by approximately 5.7%, compressive strength by 18.4%, 6.2%, and 8.8% for nano-, micro-and hybrid-modified cement mortars, respectively, compared to conventional mortars.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Carbon nanotubes: revolutionizing construction materials for a sustainable future: A review

Vafaeva,

Zegait

2023

Res. Eng. Struct. Mat.

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This review article explores the use of carbon nanotubes (CNTs) as material enhancers in construction and their advantages. It emphasizes ongoing research to gather accurate data on CNT-enhanced material properties and their role in creating more efficient and stronger building materials. The various methods of obtaining and incorporating CNTs into building materials, including chemical vapor deposition and electric arc synthesis, are discussed. A comparative analysis of building materials with and without CNTs is presented to examine their characteristics. The article also discusses future prospects for CNTs in various industries. The study aims to investigate experimental methods for obtaining CNTs, their properties, and their introduction into building materials. The research methodology involves studying literature sources, analyzing experimental results, and examining the structural, mechanical, and electronic properties of CNTs. Analytical methods based on scientific articles and publications related to CNTs in construction were used to ensure the article's reliability, validity, completeness, and objectivity. The research highlights CNTs' potential as material enhancers in construction, owing to their unique mechanical properties, such as high strength, stiffness, and corrosion resistance. Specific studies demonstrating the use of CNTs to increase the strength of concrete and other construction materials are provided, indicating the promising application of CNTs in future construction projects. However, technical challenges must be addressed, and appropriate standards and regulations should be developed before practical implementation.

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“…With the development of building materials [ 1 ], construction technology and computational theory, large-scale concrete–steel composite structures have been implemented in the past few decades. Compared with traditional reinforced concrete (RC) or steel structures, concrete-filled steel tube (CFST) structures can make full use of the material strengths of concrete and steel to improve their bearing capacity and seismic resistance [ 2 , 3 , 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

A Concrete Core Void Imaging Approach and Parameter Analysis of Concrete-Filled Steel Tube Members Using Travel Time Tomography: Multi-Physics Simulations and Experimental Studies

Zheng,

Xu,

Xia

et al. 2024

Sensors

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Concrete-filled steel tube (CFST) members have been widely used in civil engineering due to their advanced mechanical properties. However, internal defects such as the concrete core voids and interface debonding in CFST structures are likely to weaken their load-carrying capacity and stiffness, which affects the safety and serviceability. Visualizing the inner defects of the concrete cores in CFST members is a critical requirement and a challenging task due to the obvious difference in the material mechanical parameters of the concrete core and steel tube in CFST members. In this study, a curved ray theory-based travel time tomography (TTT) with a least square iterative linear inversion algorithm is first introduced to quantitatively identify and visualize the sizes and positions of the concrete core voids in CFST members. Secondly, a numerical investigation of the influence of different parameters on the inversion algorithm for the defect imaging of CFST members, including the effects of the model weighting matrix, weighting factor and grid size on the void’s imaging quality and accuracy, is carried out. Finally, an experimental study on six CFST specimens with mimicked concrete core void defects is performed in a laboratory and the mimicked defects are visualized. The results demonstrate that TTT can identify the sizes and positions of the concrete core void defects in CFST members efficiently with the use of optimal parameters.

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Electromechanical properties of multi-reinforced self-sensing cement-based mortar with MWCNTs, CFs, and PPs

Cited by 18 publications

References 25 publications

Mechanical and Durability Investigation of Composite Mortar with Carbon Microfibers (CMF)

Mechanical and Durability Investigation of Composite Mortar with Carbon Microfibers (CMF)

Carbon nanotubes: revolutionizing construction materials for a sustainable future: A review

A Concrete Core Void Imaging Approach and Parameter Analysis of Concrete-Filled Steel Tube Members Using Travel Time Tomography: Multi-Physics Simulations and Experimental Studies

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