Production and Characterization of GRC-SWCNT Composites for Shell Elements

Subaşı, Serkan; Dehghanpour, Heydar; Maraşlı, Muhammed

doi:10.5755/j02.ms.29008

Cited by 3 publications

(2 citation statements)

References 47 publications

(64 reference statements)

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“…On the other hand, since the aim of this study was to design a conductive mortar mix, the SWCNT ratio was kept above the literature, which may decrease the strength by causing low adherence between the filler and the binder in the mixture. Studies [31,46], have reported improvements in the strength of cementitious materials using lower dosages of SWCNT.…”

Section: Mechanical Test Resultsmentioning

confidence: 99%

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Experimental investigation of engineering properties of silica sand filled mortars containing high doses of SWCNT

Doğan

Dehghanpour²,

Subaşı

et al. 2023

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Recently, great efforts have been made by researchers on the mixture of electrically conductive concretes that have been developed for different purposes. In this study, an experimental research was carried out on electrically conductive mortar mixtures especially for shell elements produced for building facade cladding. Six different mixtures were produced, including the non-conductive reference mixture. Single-walled carbon nanotube (SWCNT) was used as nano-sized conductive additive material. SWCNT was added at 0.2% and 0.3% of cement weight. SF was added to the same mixtures as another group at the rate of 4% by total weight. 2, 14, 28, 90 and 180 days electrical resistivities of the obtained conductive mortar samples were measured. As a non-destructive method, dynamic resonance testing was performed and the 28-day damping rates of the samples were determined. Ultrasonic pulse velocity (UPV) and Leeb hardness tests were performed, respectively, by using other non-destructive testing methods to obtain information about the internal structure voids and surface hardness of the samples. SWCNT, which causes low machinability and therefore internal structure voids, caused a decrease in compressive strength and flexural strength, as well as a significant increase in electrical conductivity.

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Section: Mechanical Test Resultsmentioning

confidence: 99%

“…As a pozzolanic additive material, calcined kaolin was preferred in equal proportions in all mixtures. Previous studies have shown that calcined kaolin performs well when used with white cement [30,31]. The particle size ranges of silica sand, cement and calcined kaolin were compared in Table 1.…”

Section: Materials Propertiesmentioning

confidence: 99%

Experimental investigation of engineering properties of silica sand filled mortars containing high doses of SWCNT

Doğan

Dehghanpour²,

Subaşı

et al. 2023

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Experimental investigation of mechanical and physical properties of glass fiber reinforced concretes produced with different magnetized waters

Subaşı,

Ramazanoğlu,

Maraşlı

et al. 2024

Journal of Sustainable Construction Materials and Technologies

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Magnetized water may act as a thickener in cementitious mixtures due to its slippery effect. Therefore, it can be beneficial for the mixture to settle easily and to improve its strength. This study investigated the effects of magnetized water passing through pipes with magnetic field intensity (MFI) 8 and 10 on glass fiber reinforced concrete (GFRC). Three different mixtures, the GFRC mixture produced with regular tap water, were obtained, and the properties of the produced GFRC samples, such as 7, 14, and 28 days H-Leeb hardness, density, Ultrasonic pulse velocity (UPV), flexural strength, compressive strength, and fracture mechanics were investigated. In addition, SEM, EDS, FTIR, and TGA analyses were carried out to investigate the change in surface tension in the internal structures of GFRCs produced with magnetized water. Overall, the results were promising. Results showed a proportional H-Leep hardness increase with curing time and density variations. Magnetized water reduced air voids, enhancing sound transmission speeds. Flexural and compressive strength improved with magnetic water. The study suggests significant contributions to energy savings and reduced production costs, highlighting the efficient use of energy resources.

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Investigation of the Engineering Properties of Glass Fiber Reinforced Concrete (GRC) Cured with Internal Resistance

Koc,

Subasi,

Marasli

et al. 2024

JCEU

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In this study, it was aimed to produce glass fiber reinforced concrete (GRC) samples cured with internal resistance by placing resistance wires at different distances within the concrete molds and applying electric current at various voltages, while the mold surfaces were covered with stretch film. The engineering properties of these samples were then investigated. Previous studies have shown that the mechanical properties of conventional concrete, which were subjected to different curing methods, improved compared to samples that did not undergo any curing process. This study aimed to enhance both the engineering properties of the concrete samples and to accelerate the curing process. Glass fiber reinforced concrete (GRC) with dimensions of 50×50×4 cm was produced, and 25, 35, and 45V resistances were applied to three different molds with wire spacing of 5cm, 6cm, and 7cm. With this application, the GRC samples were subjected to internal resistance curing for the first 24 hours. By applying three different voltages to molds with three different wire spacings, 9 concrete samples were produced, along with 1 reference sample that did not contain any resistance wires and was not subjected to any curing process, making a total of 10 different concrete samples. After curing, the concrete samples were cut into 16cm×4cm×4cm GRC mechanical test specimens. The obtained specimens were tested for 7, 14, and 28 day compressive strength, flexural strength, unit weight, and ultrasonic pulse velocity. To examine the microstructure of the GRC samples, Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), and Fourier Transform Infrared Spectroscopy (FT-IR) analyses were conducted. These analyses investigated the physical and chemical development processes of the samples, mass losses, products formed after hydration, and structural behaviors. As a result, it was observed that the early-age strength properties of GRC samples cured with internal resistance showed a partial increase compared to the reference sample that was not internally cured, especially in the 7-day samples. In the 14 and 28-day strength comparisons, it was observed that the cured samples showed improvement in flexural strength. According to the data obtained, the samples subjected to 35 volts of electric current yielded better results, especially in the early ages, compared to the reference sample.

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Production and Characterization of GRC-SWCNT Composites for Shell Elements

Cited by 3 publications

References 47 publications

Experimental investigation of engineering properties of silica sand filled mortars containing high doses of SWCNT

Experimental investigation of engineering properties of silica sand filled mortars containing high doses of SWCNT

Experimental investigation of mechanical and physical properties of glass fiber reinforced concretes produced with different magnetized waters

Investigation of the Engineering Properties of Glass Fiber Reinforced Concrete (GRC) Cured with Internal Resistance

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