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, ab...

Objectives: To evaluate the strength and durability behaviour of concrete specimens that have been reinforced with micro reinforcements made polypropylene fibers microfillers nanofillers such as alccofine nanosilica, respectively. Methods: The samples were to achieve a targeted 33 MPa. In this experiment, added mix in volume fractions 0%, 1%, 0.2%, 0.3%, 0.4%, optimum percentages (15%) nanosili...

In this work, a mathematical model is established to describe the removal of CO2 from gaseous mixtures including CH4 and CO2 in a polypropylene hollow fiber membrane contactor in the presence of conventional absorbents such as monoethanolamine (MEA), methyldiethanolamine (MDEA), and a blend of them. Modeling was performed in axial and radial directions under the fully-wet condition for counterc...

One of the most relevant properties of composite materials to be considered is stiffness. Fiberglass has been used traditionally as a fibrous reinforcing element when stiff materials are required. However, natural fibers are been exploited as replacements for synthetic fibers to satisfy environmental concerns. Among the different natural fibers, wood fibers show the combination of relatively hi...

One of the main risks in low-densified sandy soils with presence water and an external force such as earthquake is generation liquefaction. The influence several types reinforcement on liquefaction resistance, polypropylene fibers, geofibers, cement fibers shown this study. Cyclic stress-controlled triaxial tests cyclic strain-controlled were performed saturated samples without reinforcements u...