Journal of the Institute of Wood Science最新文献_第2页

Influence of prefreezing on the mechanical response of wood to high temperature drying 预冻对木材高温干燥力学响应的影响

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262510

L. Awoyemi

引用次数: 1

Mechanical behaviour of birch (Betula Pubescens) wood under high temperature drying 桦木(Betula Pubescens)木材在高温干燥下的力学行为

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262196

L. Awoyemi

引用次数: 0

Tool wear characteristics of oil palm empty fruit bunch (OPEFB) particleboard 油棕空果串(OPEFB)刨花板刀具磨损特性

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262277

J. Ratnasingam, T. C. Tek, S. R. Farrokhpayam, F. Ioraș

{"title":"Tool wear characteristics of oil palm empty fruit bunch (OPEFB) particleboard","authors":"J. Ratnasingam, T. C. Tek, S. R. Farrokhpayam, F. Ioraș","doi":"10.1179/002032009X12536100262277","DOIUrl":"https://doi.org/10.1179/002032009X12536100262277","url":null,"abstract":"Abstract A series of machining experiments on the oil-palm empty fruit bunch (OPEFB) particleboard were carried out using a CNC router, to evaluate the tool wearing properties of the composite in comparison with a standard wood-material particleboard. A single-fluted tungsten-carbide router bit (12 mm dia., 18 000 rpm), with a rake angle of 15° was used in this experiment, in which the depth of cut was 1.5 mm and feed speed was 4.5 m/min. The router bit machined the edge of the board, moving along the full length before returning to repeat the cycle. The tool was examined for the extent of wear after complete failure had occurred. The result found that the wear pattern was similar in the oil-palm based particleboard and the wood-based particleboard, but the former is twice more abrasive compared to the latter. Microscopic examination of the cutter edge reveal a greater incidence of micro-fracture when cutting the oil-palm based particleboard, indicating the presence of hard impurities in the composite. From an economic perspective, the tooling cost for machining oil-palm based particleboard is estimated to be twice of the cost for machining wood-based particleboard. This study shows that the machining properties of oil-palm based particleboard will be a primary concern, if it is to find widespread application as a potential substitute for wood-based particleboard.","PeriodicalId":154257,"journal":{"name":"Journal of the Institute of Wood Science","volume":"78 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129203436","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}

引用次数: 1

Liquefaction efficiency of Hevea Brasiliensis wood in phenol with hydrochloric acid as a catalyst 盐酸催化巴西橡胶树木材苯酚液化效率的研究

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100261999

S. Chauhan, A. Karmarkar

{"title":"Liquefaction efficiency of Hevea Brasiliensis wood in phenol with hydrochloric acid as a catalyst","authors":"S. Chauhan, A. Karmarkar","doi":"10.1179/002032009X12536100261999","DOIUrl":"https://doi.org/10.1179/002032009X12536100261999","url":null,"abstract":"Abstract Rubber (Hevea brasiliensis) wood powder was liquefied in phenol using hydrochloric acid (HCl) as a catalyst and the influence of various process variables on liquefaction efficiency was studied. Experiments were carried out to study the effect of temperature, liquid ratio (phenol to wood ratio) and catalyst content on liquefaction efficiency. Liquefaction efficiency of 49% to 82% was achieved under different reaction conditions. Analysis of variance (ANOVA) indicated that the main effect of all the factors and interaction effect of the linear component of liquid ratio and the quadratic component of catalyst content are significant on liquefaction efficiency at the 5% level of significance. Based on the ANOVA, a non-linear regression equation was obtained to predict the liquefaction efficiency for rubber wood meal at a given experimental condition (temperature, liquid ratio and catalyst content). The liquefaction efficiency was found to be more sensitive at the lower levels of factors. There was no significant increase in liquefaction efficiency above 120°C at any liquid ratio. The residual contents after liquefaction were characterised by FTIR spectroscopy. The spectra of the residual content indicated a complete dissolution of lignin and hemicellulose leaving some cellulosic part of wood as a residual.","PeriodicalId":154257,"journal":{"name":"Journal of the Institute of Wood Science","volume":"505 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123199682","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}

引用次数: 2

Testing optimised hardwood drying schedules that allow for biological variability 测试优化的硬木干燥时间表，允许生物变异性

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262114

L. Pordage, T. Langrish

引用次数: 0

Durability of Malaysian timbers against the Asian subterranean termite Coptotermes gestroi Wasmann 马来西亚木材对抗亚洲地下白蚁Coptotermes gestroi Wasmann的耐久性

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262358

K. Roszaini, R. Rafeadah, J. Dahlan

引用次数: 13

Timber use practices in Uganda's building construction industry: current situation and future prospects 乌干达建筑工业的木材使用实践:现状和未来前景

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262475

A. Zziwa, Y. N. Ziraba, J. Mwakali

{"title":"Timber use practices in Uganda's building construction industry: current situation and future prospects","authors":"A. Zziwa, Y. N. Ziraba, J. Mwakali","doi":"10.1179/002032009X12536100262475","DOIUrl":"https://doi.org/10.1179/002032009X12536100262475","url":null,"abstract":"Abstract The timber utilisation practices in the Ugandan construction industry were examined to identify research and development prospects. The research was focused on the main issues of engineering concerns regarding timber utilisation as a building material. Information was obtained by reviewing literature, interviewing traders and observing timber yards and construction sites. The study showed that there are many gaps between wood utilisation and research. It was observed that there are over 45 timber species on the market without quality control measures; timber classification and timber grading are mainly visual and subjective due to lack of strength data. Whereas research focus in advanced countries has been on use of non-destructive strength evaluation approaches to enhance timber utilisation for consumer satisfaction; the limited timber research in Uganda based on destructive techniques has been for comparison of species. Therefore, there is need to investigate strength properties of timbers as a first attempt to developing local timber standards. There is a need to explore modeling and non destructive evaluation techniques as a means of ascertaining predictable structural strength sizes in Uganda.","PeriodicalId":154257,"journal":{"name":"Journal of the Institute of Wood Science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121867064","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}

引用次数: 10

Analytical hierarchy process for optimised choice of machines for secondary wood industries 二次木材工业机械优化选择的层次分析法

Journal of the Institute of Wood Science Pub Date : 2009-10-01 DOI: 10.1179/002032009X12536100262079

M. Azizi

引用次数: 2

RFV Drying Schedule Development for Thick Western Red Cedar Timbers 西部红杉厚材RFV干燥规程的开发

Journal of the Institute of Wood Science Pub Date : 2008-12-01 DOI: 10.1179/wsc.2008.18.2.68

D. Elustondo, S. Avramidis, H. Keery, R.H.

引用次数: 2

Wood and Engineered Wood Product Connections Using Small Steel Tube Fasteners: An Experimental Study 用小钢管紧固件连接木材和工程木制品:一项实验研究

Journal of the Institute of Wood Science Pub Date : 2008-12-01 DOI: 10.1179/wsc.2008.18.2.59

B. Murty, A. Asiz, I. Smith

{"title":"Wood and Engineered Wood Product Connections Using Small Steel Tube Fasteners: An Experimental Study","authors":"B. Murty, A. Asiz, I. Smith","doi":"10.1179/wsc.2008.18.2.59","DOIUrl":"https://doi.org/10.1179/wsc.2008.18.2.59","url":null,"abstract":"Abstract The work discussed is aimed at identifying combinations of 'wood member' materials and mechanical fasteners capable of creating structural connections that have high initial stiffness, high strength and high ductility. Experimentation shows that the goal can be achieved by joining sawn wood and Engineered Wood Products (EWP) using steel tube fasteners with outside diameters up to 12.7 mm in conjunction with steel plate link elements. Wood members considered are Spruce lumber and Laminated Strand Lumber (LSL), with rectangular cross-sections. In such connections the steel plate link elements are located in slots cut into the ends of wood members so that the plates lie in planes parallel to wide faces of the joined members. Fasteners are placed in tight-fitting pre-drilled holes that penetrate both members and link elements. Connection specimens were axially loaded in tension at a loading rate that caused the maximum capacity to be reached in about 0.1 hours. All test specimens exhibited highly ductile failure, as well as good strength and stiffness. Some splitting occurred at failure in specimens with larger sized tube fasteners in Spruce sawn lumber members, reflecting that lumber has inherently low fracture resistance. However, there was no evidence of splitting in specimens with LSL members because it is a highly fracture resistant material. As revealed by the experimentation, it is possible to prevent premature splitting failures in connections that join either sawn wood or EWP provided that tube fasteners are correctly sized.","PeriodicalId":154257,"journal":{"name":"Journal of the Institute of Wood Science","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121461881","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}

引用次数: 4