عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The use of wood fibers and recycled paper fibers in cement composites has many advantages. Wood fiber reinforced composites are easy to cast or mold into a desired shape, resistant to fire, as well as being resistant to harmful effects of sunlight, rain, and insects. These composites also have low thermal conductivity, a great degree of processing flexibility, in addition to helping eliminate environmental pollution by recycling wood fiber. The present study seeks to investigate the effect of eucalyptus and beech wood flour on the mechanical properties of wood–cement composites. Five levels of wood (0%, 8%, 20%, 32% and 40%) and one level cement (60%) were used. Totally 15 composites were produced. The composites were manufactured using hot press and tested based on DIN 68763 standard. After preparation of test samples, mechanical properties (bending and hardness) and physical properties (water absorption and thickness swelling) were measured. Results showed that addition of both fillers reduced modulus of rupture and increased modulus of elasticity, water absorption and thickness swelling. The Eucalyptus present in composite wood-cement caused a reduction in mechanical and physical properties can use with Beech wood flour.
 Wei, Y., Zhou, Y.G., Tomita, B. (2000). “Study of hydration behavior of wood cement based composite in effect of chemical additives on the hydration characteristics and strengths of wood cement composites”. Journal of Wood Science, Vol.46, pp. 444-451.
 Ashori, A., Tabarsa, T., Sepahvand, S. (2012). “Cement-bonded composite boards made from poplar strands”. Construction and Building Materials, Vol. 26, pp. 131-134.
 Ashori, A., Tabarsa, T., Azizi, K., Mirzabeygi, R. (2011). “Wood–wool cement board using mixture of eucalypt and poplar”. Industrial Crops and Products, Vol. 34, pp. 1146-1149.
 Naghizadeh, Z., Faezipour, M., Ebrahimi, G., Hamzeh, Y. (2012). “Manufacture of lignocellulosic fiber–cement boards containing foaming agent”. Construction and Building Materials, Vol. 35, pp. 408-413.
 Semple, K., Evans, P.D. (2007).“Adverse effect of heartwood on the mechanical properties of wood-wool cement boards manufactured from radiate pine wood”. Wood and fiber Science, Vol. 32, pp. 37-43.
 Aigbomian, E.P., Fan, M. (2013). “Development of Wood-Crete building materials from sawdust and waste paper”. Construction and Building Materials, Vol. 40, pp. 361-366.
 Turgut, P. (2007). “Cement composites with limestone dust and different grades of wood sawdust”. Building and Environment, Vol. 42, pp. 3801-3807.
 Al Rima, K., Ledhem, A., Douzane, O., Dheilly, R., Queneudec, M. (1999). “Influence of the proportion of wood on the thermal and mechanical performances of clay cement wood composites”. Cement and Concrete Composites, Vol. 21, pp. 269-276.
 Shao, Y., Moras, S., Ulkem, N., Kubes, G., (2000). “Wood fiber-cement composites by extrusion”, Canadian Journal of Civil Engineering, Vol. 27, pp. 543-552.
 Hermawan, D., Hata, T., Kawai, S., Nagadomi, W., Kuroki, Y. (2002). “Effect of carbon dioxide- air concentration in the rapid curing process on the properties of cement bonded particleboard”. Journal of Wood Science, Vol. 48, pp. 179-184.
 Qi, H., Cooper, P.A., Wan, H. (2006). “Effect of carbon dioxide injection on production of wood cement composites from waste medium density fiberboard (MDF)”. Waste Management, Vol. 26, pp. 509-515.
 Jongvisuttisun, P., Negrello, C., Kurtis, K.E. (2013). “Effect of processing variables on efficiency of eucalyptus pulps for internal curing”. Cement and Concrete Composites, Vol. 37, pp. 126-135.
 Savastano, H., Warden, P.G., Coutts, R.S.P. (2000). “Brazilian waste fibers as reinforcement for cement based composite. Cement and Concrete composites”. Cement and Concrete Composites, Vol. 22, pp. 379-384.
 Neithalath, N., Weiss, J., Olek, J. (2004). “Acoustic performance and damping behavior of cellulose cement composites”. Cement and Concrete Composites, Vol. 26, pp. 359-370.
 Pehanich, J.L., Blankenhorn, P.R., Silsbee, M. (2004). “Wood fiber surface treatment level effects on selected mechanical properties of wood fiber cement composites”. Cement and Concrete Research, Vol. 34, pp. 59-65.
 Latibari, A., Hossein zade, A., Karegarfard, A. and Golbabaei, F. (1996). Investigation of particle board properties from palm waste. Journal of research Institute of forests and rangelands. Vol. 148. Pp. 49-110.
 Dost hosseini, K. and khademi Eslam, H. (1993). Investigated industrial use of lignocellulose resources in Iran. 1- Use of branches of fruit trees in the particle board industries. Iranian journal of natural resources. Vol. 46, pp. 63-77.
 Kord, B., Kord, B., Purabasi, S. and Kiyaeifar, A. 2010. Investigation effect of amount and type of reinforcement lignocellulosic on physical-mechanical properties of wood-plastic composite. Vol. 5, pp. 3. 1-10.
 Senelwa, K., Etiegni, L., Orori, B., Kirongo, B. B., Ototo, G.O., Okwara- Obanda, D., Mugwero, R., Monda, H., and Khadambi, E. (2008). Development of sawdust-cement blocks for gainful utilization of wood processing residues in Kenya. Proceedings of 4th annual international forest product utilization conference. Moi University, July 29-Aug1, Section IV, pp. 135-143.
 Wolfe, R. W., and Gjinolli, A. (1999). Durability and strength of cement- bonded wood particle composites made from construction waste. Forest Products Journal, Vol. 49 (2), pp. 24-31.
 Zziwa, A., Kizito, S., Banana, A. Y., Kaboggoza, J. R. S., Kambugu, R. K., and Sseremba, O. E. (2006). Production of composite bricks from sawdust using Portland cement as a binder. Uganda Journal of Agricultural Sciences, Vol. 12 (1), pp. 38-44.
 Hachmi, M., Moslemi, A.A. (1989). Correlation between wood-cement compatibility and wood extractives. Forest Product Journal, Vol. 39, pp. 55-58.