Pub Date : 2022-10-12DOI: 10.1080/20426445.2022.2133469
Francesco Mirko Massaro, H. Stamatopoulos, Joacim Andersen, Eirik Brekke-Rasmussen
ABSTRACT Carpentry joints are very common in existing timber structures and they may gain attention for contemporary structures, due to their high degree of reversibility. Therefore, reliable Finite Element (FE) models for carpentry joints can contribute to assessing their capacity and provide a better insight into the parameters influencing their mechanical properties. This paper presents a FE study (using Abaqus) of timber halved-and-tabled scarf joints, together with experimental results. The FE-model considers fracture due to combined shear and tension perpendicular-to-grain by using cohesive zone modelling. Experimental tests on spruce solid timber specimens were performed to validate the model. The specimens were constructed by the use of a CNC-machine. For comparative purposes, two handmade specimens were tested, resulting in a lower load capacity. The FE results showed that initial gaps have a considerable effect on capacity. For certain assumed initial gaps, the FE-model could predict the capacity, however, it underestimated the deformation.
{"title":"Finite element modelling and experimental verification of timber halved and tabled scarf joints","authors":"Francesco Mirko Massaro, H. Stamatopoulos, Joacim Andersen, Eirik Brekke-Rasmussen","doi":"10.1080/20426445.2022.2133469","DOIUrl":"https://doi.org/10.1080/20426445.2022.2133469","url":null,"abstract":"ABSTRACT Carpentry joints are very common in existing timber structures and they may gain attention for contemporary structures, due to their high degree of reversibility. Therefore, reliable Finite Element (FE) models for carpentry joints can contribute to assessing their capacity and provide a better insight into the parameters influencing their mechanical properties. This paper presents a FE study (using Abaqus) of timber halved-and-tabled scarf joints, together with experimental results. The FE-model considers fracture due to combined shear and tension perpendicular-to-grain by using cohesive zone modelling. Experimental tests on spruce solid timber specimens were performed to validate the model. The specimens were constructed by the use of a CNC-machine. For comparative purposes, two handmade specimens were tested, resulting in a lower load capacity. The FE results showed that initial gaps have a considerable effect on capacity. For certain assumed initial gaps, the FE-model could predict the capacity, however, it underestimated the deformation.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47108414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-02DOI: 10.1080/20426445.2022.2094115
Alisson Rodrigo Souza Reis, Matheus da Costa Gondim, Patrícia Soares Bilhalva dos Santos, Caroline Rodrigues Soares, Deivison Venicio Souza, P. Zanatta
ABSTRACT The objective of this study was to characterize and analyse the charcoal produced for domestic use in the municipality of Tucuruí, Pará, Brazil. To this end, 15 samples were strategically collected from 5 different locations, and the moisture, fixed carbon, volatile material, ash content, calorific value and relative density of the samples were analysed in the laboratory. The charcoal commercialized in the municipality had mean values of 10.8% moisture, 74.12% fixed carbon, 22.77% volatile material, 3.10% ash, an apparent density of 335 g/cm , and a calorific value of 30.15 kJ/kg. Although these values are broadly consistent with those presented in the literature for charcoal obtained from Amazonian species, the products are not recommended for the use for which they are produced. Factors such as packaging, storage and material heterogeneity should be routinely inspected during the charcoal manufacturing process and its subsequent commercialization.
{"title":"The quality of artisanal charcoal sold for domestic use in Tucuruí municipality in the Brazilian Amazon","authors":"Alisson Rodrigo Souza Reis, Matheus da Costa Gondim, Patrícia Soares Bilhalva dos Santos, Caroline Rodrigues Soares, Deivison Venicio Souza, P. Zanatta","doi":"10.1080/20426445.2022.2094115","DOIUrl":"https://doi.org/10.1080/20426445.2022.2094115","url":null,"abstract":"ABSTRACT The objective of this study was to characterize and analyse the charcoal produced for domestic use in the municipality of Tucuruí, Pará, Brazil. To this end, 15 samples were strategically collected from 5 different locations, and the moisture, fixed carbon, volatile material, ash content, calorific value and relative density of the samples were analysed in the laboratory. The charcoal commercialized in the municipality had mean values of 10.8% moisture, 74.12% fixed carbon, 22.77% volatile material, 3.10% ash, an apparent density of 335 g/cm , and a calorific value of 30.15 kJ/kg. Although these values are broadly consistent with those presented in the literature for charcoal obtained from Amazonian species, the products are not recommended for the use for which they are produced. Factors such as packaging, storage and material heterogeneity should be routinely inspected during the charcoal manufacturing process and its subsequent commercialization.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45449272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-16DOI: 10.1080/20426445.2022.2117923
G. Roberts, C. Skinner, G. Ormondroyd
ABSTRACT This study assesses the environmental and social impacts of a modified softwood produced using radiata pine sourced from New Zealand or Chile. The LCA found that differing forestry and transport burdens associated with each location broadly cancelled each other out, giving overall product footprints that were very similar. Boiler gas and phenol-formaldehyde resin were the biggest emitters of GHG emissions, and normalization highlighted toxicity impacts as significant, largely due to the resin input. SLCA hotspots analyses suggest that the forestry sector in Chile has more potential social risks than the equivalent sector in New Zealand. However, each sector scored poorly in different social aspects making it difficult to recommend a sector without introducing subjective judgements. Combining LCA with SLCA is still novel, but this study found it added useful insights into a broader range of impacts associated with sustainable production, especially given the similarity of the environmental LCA results taken alone.
{"title":"The environmental and social impacts of modified wood production: effect of timber sourcing","authors":"G. Roberts, C. Skinner, G. Ormondroyd","doi":"10.1080/20426445.2022.2117923","DOIUrl":"https://doi.org/10.1080/20426445.2022.2117923","url":null,"abstract":"ABSTRACT This study assesses the environmental and social impacts of a modified softwood produced using radiata pine sourced from New Zealand or Chile. The LCA found that differing forestry and transport burdens associated with each location broadly cancelled each other out, giving overall product footprints that were very similar. Boiler gas and phenol-formaldehyde resin were the biggest emitters of GHG emissions, and normalization highlighted toxicity impacts as significant, largely due to the resin input. SLCA hotspots analyses suggest that the forestry sector in Chile has more potential social risks than the equivalent sector in New Zealand. However, each sector scored poorly in different social aspects making it difficult to recommend a sector without introducing subjective judgements. Combining LCA with SLCA is still novel, but this study found it added useful insights into a broader range of impacts associated with sustainable production, especially given the similarity of the environmental LCA results taken alone.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42762283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-15DOI: 10.1080/20426445.2022.2118652
Oussama Chauiyakh, A. Et-tahir, Kamal Kettani, A. Cherrat, Atika Benayad, A. Chaouch
ABSTRACT This article presents a literature review on the chemical composition, antimicrobial activities of cedar oils, and the main diseases this tree is subjected to. The studies included in this review have drawn upon several databases including Scopus, Springer, ScienceDirect, Web of sciences. The keywords used in data collection were C. atlantica M, C. libani L, C. deodara L, C. brevifolia H, Red ring rot (M'jej), Cubic brown rot (Saboune). Genus Cedrus is rich in bioactive molecules such as himachalenes, atlantones and generally terpenes. These molecules have an important medicinal and cosmetic properties maintained by the inhibition and destruction of many bacteria and fungi, along with other several biological activities. Cedar suffers from pests and fungal attacks, which cause two types of fungal decay: the first one is brown cubic rot caused by Fomitopsis pinicola or Ungulina officinalis, and the red ring rot caused by Trametes pini or Phellinus chrysoloma.
摘要本文对雪松油的化学成分、抗菌活性以及雪松树所遭受的主要疾病进行了文献综述。本综述中的研究引用了Scopus、Springer、ScienceDirect、Web of sciences等多个数据库。数据收集中使用的关键词为C.atlantica M、C.libani L、C.deodara L、C.brevifolia H、红环腐病（M'jej）、立方褐腐病（Saboune）。Cedrus属富含生物活性分子，如喜玛沙烯、atlantones和一般的萜烯。这些分子具有重要的药用和美容特性，通过抑制和破坏许多细菌和真菌以及其他几种生物活性来维持。雪松受到害虫和真菌的侵袭，导致两种类型的真菌腐烂：第一种是由小有丝酵母或Ungulina officinalis引起的棕色立方腐烂，以及由小Trametes pini或Phellinus chrysoloma引起的红环腐烂。
{"title":"Review on health status, chemical composition and antimicrobial properties of the four species of the genus Cedrus","authors":"Oussama Chauiyakh, A. Et-tahir, Kamal Kettani, A. Cherrat, Atika Benayad, A. Chaouch","doi":"10.1080/20426445.2022.2118652","DOIUrl":"https://doi.org/10.1080/20426445.2022.2118652","url":null,"abstract":"ABSTRACT This article presents a literature review on the chemical composition, antimicrobial activities of cedar oils, and the main diseases this tree is subjected to. The studies included in this review have drawn upon several databases including Scopus, Springer, ScienceDirect, Web of sciences. The keywords used in data collection were C. atlantica M, C. libani L, C. deodara L, C. brevifolia H, Red ring rot (M'jej), Cubic brown rot (Saboune). Genus Cedrus is rich in bioactive molecules such as himachalenes, atlantones and generally terpenes. These molecules have an important medicinal and cosmetic properties maintained by the inhibition and destruction of many bacteria and fungi, along with other several biological activities. Cedar suffers from pests and fungal attacks, which cause two types of fungal decay: the first one is brown cubic rot caused by Fomitopsis pinicola or Ungulina officinalis, and the red ring rot caused by Trametes pini or Phellinus chrysoloma.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42617057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-01DOI: 10.1080/20426445.2022.2117924
Bruna de Araújo Braga, S. Iwakiri, R. Trianoski, Renan Zunta Raia
ABSTRACT The potential of Attalea maripa and Attalea speciosa was evaluated for the production of edge-glued panels. The chemical and physical properties and the quality of the bonding of the species and mixed treatment between them, under different conditions, were evaluated. The length bonding was performed with polyvinyl acetate (PVA) adhesive and the side with PVA and emulsion polymer isocyanate (EPI) in two spreading rates. The species A. maripa has a lower content of extractives in cold and hot water, total extractives, ash and pH, and higher density compared to A. speciosa. The tangential, radial and volumetric shrinkage and shrinkage anisotropy of the species were statistically equal. On the length bonding, only in the tensile test after drying pre-treatment were the requirements of the technical standards not met. As regards side bonding, the treatments of A. maripa and mixed joints with EPI reached the standard for the pre-treatment in cold water.
{"title":"Evaluation of the potential use of Amazonian palm species for the production of edge-glued panels","authors":"Bruna de Araújo Braga, S. Iwakiri, R. Trianoski, Renan Zunta Raia","doi":"10.1080/20426445.2022.2117924","DOIUrl":"https://doi.org/10.1080/20426445.2022.2117924","url":null,"abstract":"ABSTRACT The potential of Attalea maripa and Attalea speciosa was evaluated for the production of edge-glued panels. The chemical and physical properties and the quality of the bonding of the species and mixed treatment between them, under different conditions, were evaluated. The length bonding was performed with polyvinyl acetate (PVA) adhesive and the side with PVA and emulsion polymer isocyanate (EPI) in two spreading rates. The species A. maripa has a lower content of extractives in cold and hot water, total extractives, ash and pH, and higher density compared to A. speciosa. The tangential, radial and volumetric shrinkage and shrinkage anisotropy of the species were statistically equal. On the length bonding, only in the tensile test after drying pre-treatment were the requirements of the technical standards not met. As regards side bonding, the treatments of A. maripa and mixed joints with EPI reached the standard for the pre-treatment in cold water.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48104948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-30DOI: 10.1080/20426445.2022.2117929
C. Muthumala, S. De Silva, P. Alwis, K. K. I. U. Arunakumara
ABSTRACT Shorter sections of sawn timber material resulted from timber industry are considered to be wastes; thus regularly dumped by sawmills. Finger-joint, a method which connects two small pieces of timber together is recognized as a sound technique to minimize the wastage. In this process, sections of different timber species are bonded together for making finger-joint boards. In this connection, selection of the best possible combination of timber species is vital as the success largely depends on the mechanical properties of the pieces. In this study, commonly used 32 timber species were employed to develop a timber classification system based on strength properties of timber species. Cluster analysis was used in grouping the species with similar strength properties. Accordingly, timber species were grouped into five strength classes as very low, low, medium, high and very high. A significant correlation (P = 0.000) between the strength index and timber density was also observed.
{"title":"Strength index-based timber classification of Sri Lankan timbers and potential for finger-joint production from wood off-cuts","authors":"C. Muthumala, S. De Silva, P. Alwis, K. K. I. U. Arunakumara","doi":"10.1080/20426445.2022.2117929","DOIUrl":"https://doi.org/10.1080/20426445.2022.2117929","url":null,"abstract":"ABSTRACT Shorter sections of sawn timber material resulted from timber industry are considered to be wastes; thus regularly dumped by sawmills. Finger-joint, a method which connects two small pieces of timber together is recognized as a sound technique to minimize the wastage. In this process, sections of different timber species are bonded together for making finger-joint boards. In this connection, selection of the best possible combination of timber species is vital as the success largely depends on the mechanical properties of the pieces. In this study, commonly used 32 timber species were employed to develop a timber classification system based on strength properties of timber species. Cluster analysis was used in grouping the species with similar strength properties. Accordingly, timber species were grouped into five strength classes as very low, low, medium, high and very high. A significant correlation (P = 0.000) between the strength index and timber density was also observed.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41450150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-09DOI: 10.1080/20426445.2022.2110154
Z. Guan, Yue Zhang
ABSTRACT Russia is China’s main log supplier and has implemented a series of log export control policies. The implementation of Russia’s export control policy has inevitably had an impact on China’s timber processing industry. This paper uses breakpoint regression to analyse the impact of the increase in the import price of logs under the Russian log export control policy on the market price of timber products in China. The results show that under the control policy, the increase in log import prices had a significant positive impact on the timber product market when April 2008, January 2010 and January 2019 were the breakpoints. Due to the lag effects in price transmission, the impact on China's timber product market was not reflected when July 2007 and January 2018 were the breakpoints. Based on the research conclusions, this paper puts forward some suggestions from the perspective of China’s log supply security.
{"title":"The impact of increases in log import prices under Russia’s control of log exports on the market price of timber products in China","authors":"Z. Guan, Yue Zhang","doi":"10.1080/20426445.2022.2110154","DOIUrl":"https://doi.org/10.1080/20426445.2022.2110154","url":null,"abstract":"ABSTRACT\u0000 Russia is China’s main log supplier and has implemented a series of log export control policies. The implementation of Russia’s export control policy has inevitably had an impact on China’s timber processing industry. This paper uses breakpoint regression to analyse the impact of the increase in the import price of logs under the Russian log export control policy on the market price of timber products in China. The results show that under the control policy, the increase in log import prices had a significant positive impact on the timber product market when April 2008, January 2010 and January 2019 were the breakpoints. Due to the lag effects in price transmission, the impact on China's timber product market was not reflected when July 2007 and January 2018 were the breakpoints. Based on the research conclusions, this paper puts forward some suggestions from the perspective of China’s log supply security.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49151572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-29DOI: 10.1080/20426445.2022.2104212
S. Rahimi, V. Nasir, S. Avramidis, F. Sassani
ABSTRACT The uniformity of final moisture content within a drying timber batch is crucial. Lack of such uniformity leads to producing large percentages of over-dried and under-dried timber, resulting in significant quality degradation and value downgrade. This study aims to predict kiln-dried timber moisture content using its initial moisture value, timber weight, and density. The distribution of wood properties in different drying runs was analyzed, and the difference in their means was statistically assessed. Various machine learning models were used for moisture prediction. The performance of the group method of data handling network was compared with the adaptive neuro-fuzzy inference system, support vector regression, decision tree, and random forest method. The best performance was achieved using random forest with the initial moisture content and weight of the wood as input parameters. Finally, the models’ performances were compared and practical recommendations for employing the adopted methodology in industrial settings were provided.
{"title":"Benchmarking moisture prediction in kiln-dried Pacific Coast hemlock wood","authors":"S. Rahimi, V. Nasir, S. Avramidis, F. Sassani","doi":"10.1080/20426445.2022.2104212","DOIUrl":"https://doi.org/10.1080/20426445.2022.2104212","url":null,"abstract":"ABSTRACT The uniformity of final moisture content within a drying timber batch is crucial. Lack of such uniformity leads to producing large percentages of over-dried and under-dried timber, resulting in significant quality degradation and value downgrade. This study aims to predict kiln-dried timber moisture content using its initial moisture value, timber weight, and density. The distribution of wood properties in different drying runs was analyzed, and the difference in their means was statistically assessed. Various machine learning models were used for moisture prediction. The performance of the group method of data handling network was compared with the adaptive neuro-fuzzy inference system, support vector regression, decision tree, and random forest method. The best performance was achieved using random forest with the initial moisture content and weight of the wood as input parameters. Finally, the models’ performances were compared and practical recommendations for employing the adopted methodology in industrial settings were provided.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42591538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-03DOI: 10.1080/20426445.2022.2084590
T. Cahyono, Marini Dwi Lestari, T. Priadi
ABSTRACT This research was conducted to detect changes in the mechanical properties of samama wood (Anthocephalus macrophyllus) after impregnation with boron, castor bean oil, and heat treatment. Samama wood has low durability so samples were impregnated with boric acid followed by impregnation with castor oil in order to achieve some fixation of the boric acid. After impregnation, heat treatments were applied for four hours at 80°C and 160°C. Results showed that the modulus of elasticity (MOE), modulus of rupture (MOR) and hardness of samama wood generally increased after the treatments. Compared with the control, the maximum differences in MOE and MOR were 19.9% and 26.7%, respectively. Castor oil treatment also increased the density and hydrophobicity of the samama wood.
{"title":"Mechanical properties of samama wood (Antocephalus macrophyllus) after boron and castor bean oil impregnation and heat treatment","authors":"T. Cahyono, Marini Dwi Lestari, T. Priadi","doi":"10.1080/20426445.2022.2084590","DOIUrl":"https://doi.org/10.1080/20426445.2022.2084590","url":null,"abstract":"ABSTRACT This research was conducted to detect changes in the mechanical properties of samama wood (Anthocephalus macrophyllus) after impregnation with boron, castor bean oil, and heat treatment. Samama wood has low durability so samples were impregnated with boric acid followed by impregnation with castor oil in order to achieve some fixation of the boric acid. After impregnation, heat treatments were applied for four hours at 80°C and 160°C. Results showed that the modulus of elasticity (MOE), modulus of rupture (MOR) and hardness of samama wood generally increased after the treatments. Compared with the control, the maximum differences in MOE and MOR were 19.9% and 26.7%, respectively. Castor oil treatment also increased the density and hydrophobicity of the samama wood.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45517507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-16DOI: 10.1080/20426445.2022.2073075
Dominique Martial Manga Bengono, Tamba Jean Gaston, Zobo Mfomo Joseph, F. Evariste, F. Armand, Banyuy Godwin Fonyuy, Biwolé Achille Bernard
ABSTRACT This study aims to determine the sorption isotherms of three tropical woods from Cameroon to understand the conditions for their use and drying. The equilibrium moisture contents were experimentally determined using saturated salt solutions. Some anatomical parameters were also measured to assess the influence of the structure of these woods on their sorption behaviour. Among the sorption models tested, the Guggenheim-Anderson-de Boer model is the one that best fits the experimental points. Our results also reveal a strong correlation between EMCs and the size and number of anatomical parameters. Indeed, up to 40°C, Sipo which has the lowest wood density and larger vessel sizes and rays, contains more water at equilibrium that the two other woods. When temperatures increase above 50°C, Sapelli becomes more hygroscopic due to the expansion of its lumen cells. These findings highlight the need for specific data on the sorption behaviour of Central African woods, to efficiently manage their drying and use.
{"title":"Sorption behaviour of three African tropical woods (Sapelli, Sipo, Kosipo) with similar anatomical structures from Cameroon","authors":"Dominique Martial Manga Bengono, Tamba Jean Gaston, Zobo Mfomo Joseph, F. Evariste, F. Armand, Banyuy Godwin Fonyuy, Biwolé Achille Bernard","doi":"10.1080/20426445.2022.2073075","DOIUrl":"https://doi.org/10.1080/20426445.2022.2073075","url":null,"abstract":"ABSTRACT\u0000 This study aims to determine the sorption isotherms of three tropical woods from Cameroon to understand the conditions for their use and drying. The equilibrium moisture contents were experimentally determined using saturated salt solutions. Some anatomical parameters were also measured to assess the influence of the structure of these woods on their sorption behaviour. Among the sorption models tested, the Guggenheim-Anderson-de Boer model is the one that best fits the experimental points. Our results also reveal a strong correlation between EMCs and the size and number of anatomical parameters. Indeed, up to 40°C, Sipo which has the lowest wood density and larger vessel sizes and rays, contains more water at equilibrium that the two other woods. When temperatures increase above 50°C, Sapelli becomes more hygroscopic due to the expansion of its lumen cells. These findings highlight the need for specific data on the sorption behaviour of Central African woods, to efficiently manage their drying and use.","PeriodicalId":14414,"journal":{"name":"International Wood Products Journal","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2022-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49578794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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