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Material and Structure of the I-Girder From the Reinforced Wood Plastic Development

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A.N. Ekimenko,  A.S. Neverov

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In article the wood-plastic moulding composition structure with a combained reinforcing by glass fibers and carbon graphitized fibres is described. Efficiency of  the given material for composite I-joist manufacturing new ram extrusion method, allowing directly in the time of product formation to carry out its reinforcing lengthways on an average line of section contour by strings in the form of a twine fromhigh-strength materials, with a tension to level of 60-90 % of their breaking strength, is considered. Efficiency of phenol-formaldehyde pitches modification by poly-ograno-siloxanes regarding to increasing of moistening ability compound binding in relation to reinforcing fibres, increases of impact strength of a composite and its ecological compatibility at processing is investigated. The structure of the thermosetting wood-plastic moulding composition, with the raised impact strength, water-, chemical and fatigue resistance, is developed. Physico-mechanical properties of the I-joists, made by an original ram extrusion method from a new composite, are investigated. Considering, that rigidity of a new composite material exceeds a similar indicator for straight-grained whole section timber of a first-claas pine, and also essentially smaller cost price of composite I-joist from it in comparison with bars or glued I-joists from straight-grained wood; their higher weather resistance - such products are represented perspective for wide application in truss constructions with increased requirements to strength and durability. The essential composite I-joist depreciation is provided with use of accessible and cheap raw materials: the crushed waste of wood, a waste of glass and carbon fibres from chemical manufactures in a kind of waste matches which practically are not involved in repeated manufacture and, now are not utilised, being a source of ecological pollution.


A.N. Ekimenko1, Candidate of Engineering, Senior Researcher, A.S. Neverov2, Doctor of Engineering, Professor


1Institute of Innovative Researches, 2Belorussian State University of Transport ::: 1, Karpovicha str. 5/18, Gomel, 246017, Belarus; е-mail:  2, Kirov str., 34, Gomel, 246653, Belarus;  ph: (0232) 95-39-32


reinforced wood composite, I-joist, ram extrusion, combined reinforcing.


1. Aleksandrov A.V., Potapov V.D., Derzhavin B.P. Soprotivlenie materialov [Resistance of Materials]. Moscow, 2009. 560 p. 2. Nikitin V.M., Obolenskaya A.V., Shchegolev V.P. Himija drevesiny i celljulozy [Wood and Cellulose Chemistry]. Moscow, 1978. 367 p. 3. Arkles B. Silane Coupling Agents: Connecting Across Boundaries. Gelest Inc., 2006, 60 p. 4. Engineering Components for Efficient Framing, Wood Truss Council of America (WTCA), Madison, WI, 1998. 5.I-Joist, The Green Building Solution. Available at: http://www.internationalbeams. com/i-joists. 6. Spaun F.D. Reinforcement of Wood with Fiberglass. Forest Products Journal, 1981, no. 31(4), pp.26-33.

Material and Structure of the I-Girder From the Reinforced Wood Plastic Development


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