Life cycle assessment of a preservative treated wooden deck

Dias, Andre; Santos, Pedro; Dias, Alfredo M. P. G.; Silvestre, José Dinis; Brito, Jorge de

doi:10.1080/17480272.2021.1897673

Cited by 8 publications

(5 citation statements)

References 11 publications

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“…Wood is one of the most commonly used materials in construction since it is abundant, sustainable, and presents a great strength-to-weight ratio compared with other materials such as concrete and steel [1]. In Portugal, many wood species have been tested for either construction or non-construction applications (e.g., pulp industry) [2][3][4][5][6][7][8][9], but maritime pine (Pinus pinaster Aiton.) and eucalyptus (Eucalyptus globulus Labill.)…”

Section: Introductionmentioning

confidence: 99%

“…are two of the most common wood species in Portuguese forests [10] and are still the most used in the construction, furniture, and pulping sectors [11]. However, the usage of eucalyptus in construction and furniture is limited by the drying defects that it might present and its low permeability [12][13][14], which is an issue with its treatment for greater biological durability, for example [9].…”

Section: Introductionmentioning

confidence: 99%

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Microwave Treatments and Their Effects on Selected Properties of Portuguese Pinus pinaster Aiton. and Eucalyptus globulus Labill. Wood

Mascarenhas,

Dias,

Christoforo

et al. 2023

Forests

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The most widespread wood species in the Portuguese forest and the most widely utilized are maritime pine (Pinus pinaster) and eucalyptus (Eucalyptus globulus Labill). In the case of eucalyptus, except for the pulping sector, it might have limited usage due to drying issues and low permeability. Microwave (MW) treatment is a technology that has been used to improve wood species’ permeability. Therefore, the present paper aimed to evaluate the MW treatment of both Portuguese wood species and to investigate the effects of different MW treatments on wood’s density, water uptake capability, modulus of rupture (MOR), and modulus of elasticity (MOE). Using small clear wood specimens, two MW powers were used, 700 and 1200 W, and the samples were submitted to successive MW cycles of 2 min till they reached the required dryness. The results showed that each wood species had a different behavior during the MW drying in terms of drying rate, supply, and consumption of energy. In general, with the increase in MW power, the densities of both species decreased and the water uptake increased, as a possible indicator that a certain level of microstructural damage might have occurred. Regarding the mechanical properties of MW-treated maritime pine and eucalyptus wood specimens, under the harshest conditions (MW power of 1200 W), MOR and MOE were reduced compared with the wood sample without MW treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microwave Treatments and Their Effects on Selected Properties of Portuguese Pinus pinaster Aiton. and Eucalyptus globulus Labill. Wood

Mascarenhas,

Dias,

Christoforo

et al. 2023

Forests

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show abstract

“…However, at the same time, it does not have a statistically significant impact on the strength properties of wood, and this may have been the case with the results presented in this work. Hence, given that maritime pine is a commonly used wood species for wooden poles but whose heartwood faces challenges in being impregnated with preservative products [25,[58][59][60], the acceptable results of the compressive strength of MW-dried wood samples and their improved impermeability due to MW drying are favorable points for MW dryings. Thus, adopting the appropriate parameters of MW drying, such as MW power and drying time, including the MW cycle time in intermittent drying, can lead to minor impacts on the mechanical properties of wood samples since the achieved temperatures will not be so elevated and, consequently, the generated steam pressure.…”

Section: Discussionmentioning

confidence: 99%

Section: Evaluation Of the Water Impregnability And Compressive Strengthmentioning

confidence: 99%

Moisture and Temperature Profiles of Heartwood Pinus pinaster Ait. Wood Specimens during Microwave Drying

Mascarenhas,

Simões,

Dias

et al. 2024

Forests

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Microwave (MW) drying of wood has gained popularity in the field of wood modification. The rise in temperature during MW drying leads to increased steam pressure, enhancing wood permeability but potentially decreasing mechanical properties. Understanding temperature and moisture behaviors during MW drying is crucial for its industrial application in wood drying. Therefore, this study aimed to characterize the temperature and moisture behaviors during MW drying of small Portuguese maritime pine (Pinus pinaster Aiton.) wood samples to support a wider use of this technology. The effects on water uptake and the compressive strength parallel to the grain were also investigated. The results indicated three distinct phases in the MW drying rates, with an average of 0.085% of water removed per second. Moreover, the temperature underwent three distinct stages: an initial rapid increase, a period of constant temperature, and a slight decrease until drying was complete. At the beginning of MW drying, the temperatures were below 100 °C, with average temperatures ranging from 126 to 145 °C. Specimens with lower initial moisture content had higher temperatures, and a positive correlation was found between initial moisture content and drying time. In contrast, negative correlations were found between the initial moisture content and average temperature, as well as average temperature and MW drying time. Additionally, the operating condition parameters used in MW drying of pine samples enhanced water impregnability by 65%, generating a slight reduction of 11% in compressive strength. It was also noticed that the initial moisture content did not impact MW-dried samples’ water uptake or compressive strength. Finally, although small clear wood samples of maritime pine were utilized, the temperature and moisture patterns observed closely matched real-scale specimens. Thus, the findings corroborate a wide utilization of MW technology for wood drying, mainly demonstrating positive possibilities for structural-sized wood specimens.

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“…Kot učinkovita metoda za ugotavljanje okoljskega odtisa se je izkazala analiza življenjskega cikla (LCA), ki omogoča preučitev raznovrstnih vplivov na okolje v celotnem življenjskem ciklu in predstavlja celosten vpogled v prednosti in pomanjkljivosti procesov in izdelkov (Sinkko et al, 2023). Dias et al (2022) so z uporabo LCA analizirali kombinacije površinske obdelave (insekticid + fungicid) in/ali vakuumske impregnacije (biocid na vodni osnovi) na kriptomeriji, smreki, boru in evkaliptusu. Kot pomemben dejavnik pri končnih rezultatih se je izkazala naravna odpornost lesa.…”

Section: Introductionunclassified

Analiza okoljskih in ekonomskih vplivov mineraliziranega lesa na primeru Plečnikove klopce z uporabo LCA in LCC metodologije

Remic,

Sitar,

Jošt

2023

les-wood

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Les je v krožnem biogospodarstvu prepoznan kot obetavna surovina, saj ima sposobnost skladiščenja ogljika, ki pa je pogojena z življenjsko dobo izdelka. Podaljšanje življenjske dobe lesa lahko dosežemo z ustrezno zaščito, pogosto z uporabo kemikalij, ki so lahko okolju in ljudem nevarne. Mineralizacija lesa s hidroksiapatitom predstavlja potencial za okolju prijazno zaščito lesa. Na primeru Plečnikove parkovne klopce, mineralizirane s hidroksiapatitom, sta bili izvedeni LCA in LCC analizi. Analiza LCA je temeljila na standardih EN ISO 14040 in EN ISO 14044, analiza LCC je bila prilagojena po vmesniku Evropske komisije za javna naročila. Pri primerjavi mineraliziranega lesa z življenjsko dobo 16 oz. 24 let z referenčnim (nemineraliziranim) lesom so rezultati pokazali, da je mineraliziran les z življenjsko dobo 24 let okolju najprijaznejša in hkrati najcenejša izbira. Največje negativne vplive na okolje je predstavljal mineraliziran les z življenjsko dobo 16 let, najdražja alternativa je bil referenčni les.

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Life cycle assessment of a preservative treated wooden deck

Cited by 8 publications

References 11 publications

Microwave Treatments and Their Effects on Selected Properties of Portuguese Pinus pinaster Aiton. and Eucalyptus globulus Labill. Wood

Microwave Treatments and Their Effects on Selected Properties of Portuguese Pinus pinaster Aiton. and Eucalyptus globulus Labill. Wood

Moisture and Temperature Profiles of Heartwood Pinus pinaster Ait. Wood Specimens during Microwave Drying

Analiza okoljskih in ekonomskih vplivov mineraliziranega lesa na primeru Plečnikove klopce z uporabo LCA in LCC metodologije

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