Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6725020 | Construction and Building Materials | 2013 | 6 Pages |
Abstract
This work presents a study on the effects of luffa fibers and gamma radiation as tools for mechanical improvement of polymer concrete based on a polyester resin/foundry sand mixture. Different concentrations of irradiated and non-irradiated fibers (0.3, 0.6 and 0.9Â wt%) and higher irradiation doses were used. The results show that the compressive strength and flexural strength values decrease gradually when increasing irradiated-fiber concentration, respect to plain concrete (without fibers and non-irradiated). Conversely an opposite effect occurs when polymer concrete is gamma irradiated, i.e. both the degree of polymerization and cross-linking of the polymeric resin are increasing. Moreover, the values for compressive and flexural strain as well as dynamic elasticity modulus increase when increasing irradiated-fiber concentration. The highest bending deformation is obtained with 0.9Â wt% of fibers and 100Â kGy of radiation dose.
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Authors
Gonzalo MartÃnez-Barrera, Enrique Vigueras-Santiago, Miguel MartÃnez-López, Maria C.S. Ribeiro, Antonio J.M. Ferreira, Witold Brostow,