Properties Evaluation of Composite Materials Based on Gypsum Plaster and Posidonia Oceanica Fibers

Estimating the amount of material without significant losses at end hybrid casting is a problem addressed in this study. To minimize manufacturing costs and improve accuracy results, correction factor (CF) was used formula to estimate volume percent order reduce during sample stage, allowing for greater confidence between approved blending plan results obtained. In context, three mixing schemes different sizes shapes (gypsum plaster, sand (0/2), gravel (2/4), Posidonia oceanica fibers (PO)) were created verify efficiency CF more precisely study physico-mechanical effects on samples. The show that use can loss almost 0%. optimal compressive strength (S1B) with lowest 7.50 MPa. Under conditions, addition PO improves mix (negligible), flexural (5.45%), density (18%), porosity (3.70%) compared S1B. On other hand, thermo-chemical treatment by NaOH increases (3.97%) due removal impurities fiber surface, as shown scanning electron microscopy. We then determined mixture ratio (PO divided sand, gravel), which equals 0.0321 because Tunisian gypsum contains small amounts bassanite calcite, X-ray diffraction results.