Fire Resistance Evaluation of New Wooden Composites Containing Waste Rubber from Automobiles

Mancel, Vladimír; Čabalová, Iveta; Krilek, Jozef; Réh, Roman; Zachar, Martin; Jurczyková, Tereza

doi:10.3390/polym14204465

Cited by 7 publications

(4 citation statements)

References 39 publications

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“…It is well known from the literature [23] that the addition of coal fly ash (by-product of coal burning in thermal power stations captured in electrofilters) to Portland cement concrete increases its performance, including its workability, mechanical strength, and durability, providing low proportion of interconnected pores in the concrete macrostructure and decreasing the permeability. However, in the current experiment, the proportion of fly ash was limited below 11 wt.% in order to obtain small and uniform pore sizes for the cellular concrete with moderate expansion by foaming the mixture.…”

Section: Methodsmentioning

confidence: 99%

High-Strength and Heat-Insulating Cellular Building Concrete Based on Calcined Gypsum

Ioana

Paunescu²,

Constantin

et al. 2022

Materials

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A cellular concrete with a fine porous structure was experimentally made using the corrosion technique for aluminum powder as an expanding agent in an aqueous solution of Ca(OH)2. The originality of this paper was the use of our own production method for the fine aluminum powder through atomizing the recycled molten waste of this metal using concentrated jets of nitrogen. Additionally, the waste melting technique involved our own microwave heating method. A high weight proportion of calcined gypsum (maximum 82.3%) represented the main concrete binder. Using moderate contents of coal fly ash (3.6–11.1%) together with perlite (4.6–6.4%) to reduce the pore size and silica fume (0.3–1.2%) with pozzolanic properties, the aim was to obtain a macrostructure characterized by a very low pore size and to increase the compressive strength (by up to 4.1 MPa), despite the relatively low density (below 641 kg/m3). An industrial method of increasing the mechanical strength by steam curing fresh concrete was applied.

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Section: Methodsmentioning

confidence: 99%

High-Strength and Heat-Insulating Cellular Building Concrete Based on Calcined Gypsum

Ioana

Paunescu²,

Constantin

et al. 2022

Materials

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“…Research by Mancel et al (2022) on the use of rubber waste (tires and insulators) as llers in the production of particleboards showed that the ignition times of boards with additives of 10%, 15% and 20% of rubber were similar to those of particleboards alone. The average time to ignition was from 298 s to 309 s. Similarly, the weight loss for the board containing 10% rubber waste additives was similar to that of the particleboard.…”

Section: Flammability Of Biocomposite Boardsmentioning

confidence: 99%

Properties of sandwich boards with a core made of bio-composite particleboard containing wood particles and walnut shells

Dukarska,

Grześkowiak,

Kawalerczyk

et al. 2024

Preprint

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The aim of the research was to investigate the possibility of producing bio-composite particleboard with a density reduced to 500–550 kg/m3, containing 25% and 50% of walnut shells. In addition, the study also concerned the possibility of using these materials in sandwich systems. Based on the results, it was found that partial replacement of wood particles with ground shells leads to a significant reduction in the strength of the boards bonded with urea-formaldehyde (UF) resin. However, the implementation of a hybrid gluing method consisting of gluing wood particles with UF resin and walnut shells with 4,4′-methylenediphenyl isocyanate (pMDI) causes a significant improvement in the strength of the boards, especially for the variant with the highest shells content. Despite this achievement, the manufactured materials still do not meet the requirements for furniture boards. The next step of the research has shown that these boards can perform well as a core layer in the sandwich boards covered with high-strength HDF boards. Moreover, it was found that increasing the share of walnut shells positively affects the dimensional stability of boards (thickness swelling and water absorption). However, substitution of wood with shells accelerates the ignition and flameout times of the boards. It increases the heat release without significantly affecting the percentage loss of the boards’ mass during exposure to fire.

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“…The use of rubber waste as fillers improved the mechanical and physical properties of the composites. In this way, composites with waste rubber fillers have created a new sustainable material and have the potential to be used in various fields [ 20 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Impact of Rubber Recyclate Addition to the Matrix on the Strength Properties of Epoxy–Glass Composites

2023

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Currently, there is a noticeable trend of modifying new materials by using additives from the recycling of harmful waste. This is to protect the environment by using waste to produce composites and at the same time to reduce the cost of their production. The article presents an analysis of the impact of the use of rubber recyclate obtained from the utilization of car tires as a sandwich layer of epoxy–glass composites and its impact on the strength parameters of the composite. The presented research is an extension of the previously conducted analyses on composite materials modified with the addition of rubber recyclate. The four variants of the materials produced contained the same percentage amount of rubber recyclate, but differed in the way it was distributed and the number of layers. Static tensile tests as well as impact strength and kinetics of damage to samples made with and without the addition of recyclate were carried out. Observation of the structures of the materials with the use of SEM was also performed. A significant influence of the method of distributing the recyclate in layers on the strength parameters of the materials was found. In the case of composites with three and two sandwich layers of recyclate, more favorable results were obtained compared to the blank sample. In addition, the values of the impact strength measurements were subjected to statistical analysis at the significance level of α = 95%. The distributions were tested for normality with the Shapiro–Wilk test, differences between pairs were tested with the Student’s t-test for dependent groups, and ANOVA differences were tested for independent groups. Using the Student’s t-test, it was confirmed that between the pairs of variables in the configurations reference sample and modified sample, there were significant statistical differences in the distribution of impact strength measurement results for all the analyzed materials. Statistical analysis showed a significant usefulness in the selection of the material with the best strength parameters and a significant role of statistical methods in the study of anisotropic materials.

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Fire Resistance Evaluation of New Wooden Composites Containing Waste Rubber from Automobiles

Cited by 7 publications

References 39 publications

High-Strength and Heat-Insulating Cellular Building Concrete Based on Calcined Gypsum

High-Strength and Heat-Insulating Cellular Building Concrete Based on Calcined Gypsum

Properties of sandwich boards with a core made of bio-composite particleboard containing wood particles and walnut shells

Analysis of the Impact of Rubber Recyclate Addition to the Matrix on the Strength Properties of Epoxy–Glass Composites

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