Comparison of Mechanical Properties of Gypsum with and without Polypropylene Fibers

Gypsum is a mineral belonging to the group of sulfates, i.e., sulfuric acid, which often found in Earth's crust. In this paper, two main types gypsum, gypsum α and β, with different water content were prepared. Samples without polypropylene fibers, fiber lengths during preparation, produced factory located Debar region, North Macedonia, studied. Physical properties such as density, porosity, absorption capability their kinetics, packing factor, hardening others examined using methods. The goal paper was determination mechanical compressive flexure strength module elasticity prisms. For elastic properties, nondestructive method ultrasound testing used. test, quality prism assessed by measuring velocity an ultrasonic pulse passing through structure. This test conducted wave time taken get Higher velocities indicate good continuity material, while slower may many cracks or voids. comparison obtained results from these shows other physical properties.