Abstract:
In material science, advanced composites and the fundamental understanding of mechanical behavior is a rapidly expanding branch within the field of science and engineering materials. Fiber-reinforced cement composites have played a dominant role for a long time in a variety of applications for their high specific strength and modulus. Fiber reinforced cement composites has so far been successfully used in many applications such as slabs on grade, shotcrete, architectural panels, precast products, offshore structures, structures in seismic regions, thin and thick repairs, crash barriers, footings, hydraulic structures. Polyethylene has very high potential for producing high modulus and high strength fibers. Polyethylene fiber produced by melt spinning is commercially available and has been around for quite some time. To produce stronger fibers, polyethylene needs to be drawn to very high draw ratio exceeding that used in conventional fiber production. This research evaluates the effect of melt spinning ultra-draw HDPE fiber using as the reinforced material in cement mortar. A whole set of experimental data were created reference to the efficiency of using HDPE fiber reinforced on the tensile, flexural and toughness properties of cement mortar with different high drawn ratio of HDPE fibers. The fiber with the different drawn ratio10x (d10 with E xx), 25x (d25 with E xx), and 35x (d35 with E xx) fiber volume fraction (0.5%, 1.0%, 1.5%) and fiber length (5 mm., 10 mm., 15 mm., 20 mm.) were used and the stress - strain displacement relationship behavior of HDPE short fiber reinforced cement mortar were investigated. It was found that the high drawn ratio of HDPE fiber show more improvement in tensile strength and toughness than the low drawn ratio of HDPE fiber when reinforced in cement mortar. In this research, consideration the efficiency HDPE fiber reinforced cement mortar, HDPE fiber D25 is suitable for fiber volume fraction v1.5% and fiber length 20 mm. The HDPE fiber D35 is suitable for fiber volume fraction v1.0% and fiber length 15 mm.