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The increase in the adhesive strength of the epoxy and sand composite is equally regulated by the content of the sand component and the dispersiveness of its particles. The wear resistance of the composite is mainly determined by the size of sand particles, and the concentration significantly affects the degree of resistance to abrasive wear only when the fraction dispersiveness is equal to 1 mm. The maximum adhesive strength and wear resistance are characteristic for a composite of the following composition: 30 pts. wt. epoxy glue and 70 pts. wt. natural sand with a dispersiveness of 1 mm.

Effect of concentration and dispersion of filler fractions on adhesive strength and abrasion resistance of an epoxy and sand composite