Elevated Temperature Performance of Concrete Reinforced with Steel, Glass, and Polypropylene Fibers and Fire-proofed with Coating

doi:10.5829/ije.2022.35.05b.08

Cited by 8 publications

(7 citation statements)

References 53 publications

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“…This does not differ from the practical data, well known from works [1,3,5], the authors of which, by the way, also associate the effectiveness of fire protection with the formation of a foam coke layer under the influence of the burner flame. But, in contrast to the results of research reported in [6,7,18,19], our data on the effect of the swelling coating on the process of retarding the transfer of temperature allow us to state the following:…”

Section: Discussion Of Results Of Studying the Process Of Formation O...supporting

confidence: 56%

“…Work [1] notes that concrete has good strength and durability; however, it suffers from spalling and a significant reduction in strength when exposed to flame. The study was aimed at increasing the fire resistance of concrete by using two different methods: fiber reinforcement or application of a fire-retardant coating.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining patterns in the formation of an insulation layer of foam coke when protecting concrete against fire by reactive coating

Tsapko,

Likhnyovskyi,

Tsapko

et al. 2023

EEJET

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An issue related to using concrete for building structures is to ensure their stability and durability during operation within wide limits. Therefore, the object of research was the change in the properties of concrete in case of fire and its protection when applied with a reactive coating capable of forming a foam coke layer under the influence of high temperature on the coating. It has been proven that in the process of thermal action on the fire-resistant coating, the process of heat insulation of concrete involves the formation of soot-like products on the surface of the material. Thus, under the influence of the flame of the burner, a temperature arose on the surface of the sample, which led to the swelling of the coating by more than 18 mm. The measured temperature on the surface of the concrete sample under the layer of foam coke was no more than 140 °C, which indicates the formation of a fire barrier. In this regard, modeling of the process of heat transfer through the formed layer of foam coke in the process of its protection with a reactive coating was carried out and dependence was established, which makes it possible to estimate the coefficients of temperature conductivity and thermal conductivity during high-temperature action. According to the experimental data and the established dependences, the coefficient of temperature conductivity and heat conductivity of foam coke was calculated, which is 9.17·10–7 m2/s and 0.17 W/(m∙K). The assessment of the maximum possible penetration of fire through the layer of foam coke was carried out. A temperature was formed on the surface of the sample, which significantly exceeded the temperature of the destruction of concrete, and on the surface of concrete under the coating it did not reach 250 °C. So, there are reasons to assert the possibility of targeted regulation of concrete fire protection processes by using reactive coatings capable of forming a protective layer on the surface of the material that inhibits the rate of heat transfer

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Section: Discussion Of Results Of Studying the Process Of Formation O...supporting

confidence: 56%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining patterns in the formation of an insulation layer of foam coke when protecting concrete against fire by reactive coating

Tsapko,

Likhnyovskyi,

Tsapko

et al. 2023

EEJET

View full text Add to dashboard Cite

show abstract

“…In recent years, an increasing number of experimental studies have been conducted on shield tunnel linings damaged by fire [2][3][4][5][6]. As road tunnels are in a semi-enclosed state, in the event of a fire, the smoke and heat generated by the fire cannot be dissipated within a short period, resulting in situations such as dense smoke, low visibility, and high temperature.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Multifunctional Road Marking Coating for Tunnels Based on Nano SiO2 and TiO2 Modifications

Quan,

Yang,

et al. 2024

Buildings

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Multifunctional road marking coatings with the functions of high-temperature stability, degradation of exhaust gas, and self-cleaning are of great significance for the safe operation and environmental protection of tunnels. This article uses active acrylic resin and an organosilicon hydrophobic agent as the base material, selects expanded vermiculite and glass microspheres as insulation fillers, and uses ammonium polyphosphate, pentaerythritol, melamine, and aluminum hydroxide as high-thermal-stability systems to prepare a two-component road marking coating base material. Then, nano SiO2 and modified nano TiO2 are added as modifiers to prepare a multifunctional road marking coating for tunnels. The physical and chemical properties of multifunctional road marking coatings are evaluating based on laboratory tests including thermogravimetry and derivative thermogravimetry, differential scanning calorimetry, infrared spectroscopy, scanning electron microscopy, exhaust degradation, and contact angle tests. The results indicate that the developed multifunctional road marking coating effectively reduces the thermal conductivity of the carbon layer through physical changes in the flame retardant system and the heat resistance formed by the high breaking bond energy of nano SiO2 during the combustion process. It forms a ceramic-like structure of titanium pyrophosphate with nano TiO2 that is beneficial for improving flame retardancy without generating harmful volatile gases and has good flame retardant properties. N–V co-doping reduces the bandgap of TiO2, broadens the absorption range of visible light by nano TiO2, improves the catalytic efficiency of visible light, and achieves the degradation efficiency of the four harmful components NOx, HC, CO, and CO2 in automotive exhaust by 23.4%, 8.3%, 2.5%, and 2.9%, respectively. The solid–liquid phase separation in the multifunctional road marking coating in the tunnel causes the formation and accumulation of nano SiO2 and TiO2 particles on the coating surface, resulting in a microstructure similar to the “micro–nano micro-convex” on the lotus leaf surface and making a water droplet contact angle of 134.2° on the coating surface.

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“…Several techniques have been proposed to successfully modify the surface morphology and chemical composition, including sol-gel, chemical etching, chemical vapor deposition, thermal embossing, and electrodeposition (12,13). The electrodeposition technique is a cost-effective, scalable, and easy-tocontrol process for coating Ni-Cu alloy (14).…”

Section: Introductionmentioning

confidence: 99%

Effect of Current Density on Magnetic and Hardness Properties of Ni-Cu Alloy Coated on Al via Electrodeposition

Rosyidan,

Kurniawan,

Soegijono

et al. 2024

IJE

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Nickel (Ni)-rich single-phase nickel-copper (Ni-Cu) alloy coatings were produced on aluminum (Al) substrates by electrodeposition in stabilized citrate baths. Electrodeposition experiments were performed at four different current densities. Increasing the current density resulted in the metal deposition rate increasing faster than the hydrogen evolution rate; thus, the cathodic current efficiency increased. The crystal systems of the Ni-Cu alloys were face center cubic (fcc), with the (111) plane as the preferred crystal plane. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) measurements showed that the Ni content in the coating increased with increasing current density. The Ni-Cu 40 sample had the most Ni content and showed a homogeneous and compact morphology. It was found that the higher the concentration of Ni in the solution, the smaller the grain size. Measurements recorded with a vibrating sample magnetometer (VSM) showed that the Ni-Cu 40 sample provided magnetic saturation, with the highest value being 0.108 emu/g. The microhardness method produced 404 HV on the Ni-Cu 40 sample. In conclusion, higher current densities were associated with a higher Ni composition and increased thickness, which were responsible for the increases in the magnetic properties and hardness.

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Elevated Temperature Performance of Concrete Reinforced with Steel, Glass, and Polypropylene Fibers and Fire-proofed with Coating

Cited by 8 publications

References 53 publications

Determining patterns in the formation of an insulation layer of foam coke when protecting concrete against fire by reactive coating

Determining patterns in the formation of an insulation layer of foam coke when protecting concrete against fire by reactive coating

Performance Evaluation of a Multifunctional Road Marking Coating for Tunnels Based on Nano SiO2 and TiO2 Modifications

Effect of Current Density on Magnetic and Hardness Properties of Ni-Cu Alloy Coated on Al via Electrodeposition

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