Journal of Engineering and Applied Sciences
ISSN: Online 1818-7803ISSN: Print 1816-949x
Abstract
Wooden housing construction nowadays is becoming more popular because of using a renewable source of raw material it is wood creating a favorable atmosphere indoors, having a pleasant by touch surface and what is the most important it is an eco-pure material. For construction of wooden houses in Siberia as a rule, glued solid timber is used-CLT-panels, BSP, X-lam, glued wall beam. Sufficient heat and frost resistance of glued panels are provided by adhesives of polycondensation and polymerization types: C3, D3, C4, D4 according to EN 204. Glued wooden constructions must meet the requirements of State Standard (SS) 20850-2014 “Wooden glued bearing constructions” based on the standard EN 14080:2005. According to these standards the following adhesives are approved for using: Resorcinol Formaldehyde (RF), Melamine-Urea-Formaldehyde (MUF, MF); Polyurethane (PUR), Emulsion of Polymer-Isocyanate (EPI). In accordance with the current Russian standards polyurethane PUR adhesives are not approved for producing of wooden glued structures even in low-rise housing construction for walling and in Europe the production of polymer-isocyanate emulsion EPI is not approved. Resorcine-formaldehyde glue systems are used today very rare. RF forms a black color glue seam which is resistant to chemicals, aggressive compounds. To provide colorless glue seam, PUR adhesives, MUF, MF-adhesives may be used but they are quite expensive. Polyvinyl Acetates (PAE) as well as Urea-Formaldehyde adhesives (UF) are widely available, relatively cheap but they are not approved for producing of glued wooden structures of any responsibility classes and structure types. The ban is explained by the very nature of this chemical compound and its inability to bear the long-lasting static load. Therefore, the search of modifiers for cheap glue compositions is relevant and timely; they provide the necessary indicators of the strength characteristics and heat-water and frost-resistance.
How to cite this article:
Galina P. Plotnikova and Simon H. Simonyan. Improving of Adhesive Bonding Tecnology of Solid Timber for Wooden Housing Construction in Conditions of Siberian Region.
DOI: https://doi.org/10.36478/jeasci.2016.32.36
URL: https://www.makhillpublications.co/view-article/1816-949x/jeasci.2016.32.36