Abstract
In this paper, glass fibers and metal chips are mixed into the polymer concrete (PC) to study the influence on the tensile strength, mode I fracture toughness, and energy absorbed until failure of PC materials. Semi-Circular Bend (SCB) samples were manufactured with and without a central crack. The weight fractions of the elements were adjusted in the following limit: 50 wt.% coarse mineral aggregate, 25 wt.% fine mineral aggregate and 25 wt.% epoxy resins. Chopped strand glass fibers and metal chips in 2 and 4 weight percentages were added to the PC material. Compression and fracture tests were conducted to measure tensile strength, mode I fracture toughness and energy until failure of PC specimens. Experimental data showed that the presence of glass fibers and metal chips can not necessarily change the tensile strength of PC material. However, the glass fiber and metal chips fillers increased the mode I fracture toughness and energy till failure of the tested PC materials. Additionally, it was determined that the inclusion of glass fiber with 4 wt.% has a significant impact on mode I fracture toughness and energy. This is due to a bridging mechanism occurring in the PC samples enhanced by the glass fiber fillers. Also, crack needs more energy to be propagated when the crack growth path must escape the filers.
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