Przyjazny dla środowiska recykling podkładów kolejowych

Wojciechowski, Andrzej; Doliński, Adam; Radziszewska-Wolińska, Jolanta Maria; Wołosiak, Marta

doi:10.36137/1818p

Cited by 5 publications

(2 citation statements)

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“…During the tests, the control software recorded compressive strength (F c ) with an accuracy of ±0.1 N and crosshead advancement with an accuracy of ±0.001 mm. Based on the recorded data, the software calculated the maximum compressive stress using Formulas (5)- (7) for the analytical moisture content (σ cW ), which was then converted to a 12% moisture content (σ c12 ), as well as the compressive modulus (E c12 ):…”

Section: Determination Of Compressive Strength Parallel To Grainmentioning

confidence: 99%

“…However, due to the fact that creosote contains some carcinogenic compounds, it is considered a hazardous substance. By the same token, impregnated ties are deemed hazardous, which prevents their reuse at the end of their service life [7]. On the other hand, the concentration of harmful chemicals decreases over time, due to which there might be some potential for tie reapplication.…”

Section: Introductionmentioning

confidence: 99%

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Physico-Mechanical and Energy Properties of Pine (Pinus sylvestris) and Beech (Fagus sylvatica) Wood from Railroad Ties

Aniszewska,

Gendek,

Tamelová

et al. 2024

Forests

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The objective of the present work was to determine the physico-mechanical and energy properties of pine (Pinus sylvestris) and beech (Fagus sylvatica) wood from railroad ties. The ties were divided into internal and external parts as well as into parts impregnated and unimpregnated with creosote oil. The effects of creosote impregnation on wood hardness, compressive strength parallel to the grain, static bending strength, and calorific value were studied. The obtained results show that the parameters of the analyzed samples meet the standard requirements (EN 338) for construction wood (compressive and bending strength class: C50—pine; D70—beech). Depending on the particular property being studied, both pine and beech samples belong to the highest or one of the highest wood quality classes. Creosote oil considerably increased wood density (by 9% for beech and 19% for pine) but did not affect its hardness. Creosote impregnation significantly improved the compressive strength parallel to the grain of both wood species (beech: σc=51.99 MPa (IN); σc=57.78 MPa (OUT); pine: σc=36.56 MPa (IN); σc=42.45 MPa (OUT)); in the case of static bending strength, its value was increased for beech wood (σg=106.13 MPa (IN); σg=113.18 MPa (OUT)) and reduced for pine wood (σg=66.34 MPa (IN); σg=82.62 MPa (OUT)). The oil contained in wood from ties significantly elevated its calorific value (by 25% for beech and 10% for pine). Unfortunately, the presence of creosote oil currently prevents wood from railroad ties from being reused as the oil is deemed hazardous and carcinogenic. However, if it were possible to isolate the unimpregnated parts of railroad ties, they could be reapplied for construction or other uses.

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Section: Determination Of Compressive Strength Parallel To Grainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Physico-Mechanical and Energy Properties of Pine (Pinus sylvestris) and Beech (Fagus sylvatica) Wood from Railroad Ties

Aniszewska,

Gendek,

Tamelová

et al. 2024

Forests

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Environmental impact assessment of risk elements from railway transport with the use of pollution indices, a biotest and bioindicators

Radziemska

Gusiatin

Kowal

et al. 2020

Human and Ecological Risk Assessment: An International Journal

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Pyrolysis and Torrefaction—Thermal Treatment of Creosote-Impregnated Railroad Ties as a Method of Utilization

et al. 2023

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A fundamental issue of waste management and the rail transport industry is the problem of utilizing used railroad ties. Wooden railroad ties are treated with a preservative, usually creosote. Due to their high toxicity, railroad ties are considered hazardous waste and must be utilized under various directives. It is proposed to utilize the troublesome waste by using the pyrolysis and torrefaction process. The research proves that the thermal method is effective for disposing of this type of waste. Torrefaction up to 250 °C gives high efficiency of impregnation removal, while pyrolysis up to 400 °C completely neutralizes waste. A series of experiments were conducted for various final pyrolysis temperatures to determine a minimum temperature for which the obtained solid products are free from creosote. Extraction with the use of the Soxhlet technique was performed for the raw materials and the obtained solid products—chars. The oil content for liquid fraction was also examined for each sample. As a result of the thermal treatment of the waste, fuel with combustion parameters better than wood was obtained. For a high final temperature of the process, the calorific value of char is close to that of hard coal.

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Przyjazny dla środowiska recykling podkładów kolejowych

Cited by 5 publications

References 0 publications

Physico-Mechanical and Energy Properties of Pine (Pinus sylvestris) and Beech (Fagus sylvatica) Wood from Railroad Ties

Physico-Mechanical and Energy Properties of Pine (Pinus sylvestris) and Beech (Fagus sylvatica) Wood from Railroad Ties

Environmental impact assessment of risk elements from railway transport with the use of pollution indices, a biotest and bioindicators

Pyrolysis and Torrefaction—Thermal Treatment of Creosote-Impregnated Railroad Ties as a Method of Utilization

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