Mechanical properties of wood-geopolymer composite
2017
Berzins, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Morozovs, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Gross, U., Latvia Univ. of Agriculture, Jelgava (Latvia) | Iejavs, J., Forest and Wood Products Research and Development Inst., Jelgava (Latvia)
In recent years the popularity of ecological and renewable materials has grown. Aware of the limited resources as well as availability of local resources and economic grounds, the attention is paid to the development of new materials. Currently, there is a political as well as a societal demand for products that require less energy for the manufacturing process and are easy to recycle with less impact on environment. In comparison with concrete, wood-geopolymer emits less CO2, it is environmentally friendly and made from available local resources. Therefore, the geopolymer composites obtained from clay, sodium silicate and wood particles or fibre could be one of the solutions. Geopolymers are inorganic polymers that are formed by the polymerization reaction of silico-aluminate and silico-oxide. In this case, the geopolymer is formed from clay, which is mined in Latvia (silico-aluminate) and water glass (silico-oxide). The wood-geopolymer was made by mixing geopolymer with softwood particles. The aim of the research was to develop a wood-geopolymer composite material and to evaluate its optimal composition and properties. The study defined the impact of the compound on the mechanical and physical properties (bending strength, compressive strength, modulus of elasticity, swelling and thermal conductivity) of the wood-geopolymer composite. The current paper presents mechanical properties of different composition and treatment methods of wood-geopolymer. As a part of the research the geopolymer and wood geopolymer thermal conductivity was compared. The results have shown that there is a correlation between the wood-geopolymer density and the thermal conductivity. The same correlation was observed between the wood-geopolymer density and the mechanical strength.
显示更多 [+] 显示较少 [-]