Papers by Keyword: Sisal

Abstract: Mechanical and thermal properties of composites reinforced with Banana fibre (BF) and Sisal fibre (SF) were investigated in this study. Benzoylation therapy was effective for Banana fibre /Sisal. The hybridised bio-composites (PP/BF/SF) with a total 10 weight percentage were produced using three different fibres ratios between Banana fibre - and Sisal-treated. The thermal stability experiments are performed using thermogravimetric analysis (TGA) and diffraction scanning calorimetry (DSC). According to flammability test results, the treated hybrid composite (BF / PP /SF) burned at the slowest rate (only 28 mm/min) and the stiffness damping factor (Tan δ). The loss modulus (E "the ideal (PP/BF/SF) hybrid composite, T-BF5SF5, has a damping factor of 0.058 and a modulus of 86.2 (MPa). Thermomechanical analysis (TMA) was also used to effectively record the dimensional coefficient (m) versus temperature studies, with T-BF5SF5 achieving the highest dimensional coefficient (m) of 30.11 at 110°C. Keywords: Sisal; biocomposites; Banana fibre ; dynamic mechanical analysis; thermal; benzoylation.

Abstract: In the last years, the interest in eco-sustainable composites has consistently increased. Such innovative materials are actually a promising sustainable solution for structural strengthening since they can be an alternative to petroleum‐based materials, which are frequently used for masonry retrofitting. This work describes an experimental campaign dedicated to investigating the behavior of Fabric-Reinforced Cementitious Matrix (FRCM) with natural fibers (NFRCM) made with eco-sustainable materials. Experimental tests are performed on unreinforced masonry panels (URM) and reinforced ones (RM), for characterizing their mechanical behavior. URM samples are compared with RM ones accounting for their response under shear actions.

Abstract: The key focus of this work was to examine the effect of hybrid fiber reinforcement on thethermal properties of particulate based natural fiber-reinforced hybrid composites. Banana and sisal fiberswere selected as natural fiber reinforcements for the polyester matrix based composites, which wereproduced by mechanical stir mix technique. Thermo-Gravimetric Analysis (TGA) and Fourier-TransformInfrared Spectroscopy (FTIS) were conducted in accordance with American Society for Testing andMaterials (ASTM) standards for the characterization of the hybrid composites. The FTIS result shows thedisappearance of 1735 cm-1 peak, a notable evidence of NaOH treatment. The thermal analysis showedthat the hybridization significantly affected the high temperature stability of the composite, with 70%Sisal/30%Banana found to have the lowest high temperature mass loss at a temperature of 300–520oC, thushighest high temperature stability. Derivative Thermogravimetry (DTG) results shows a minor mass lossrate at a temperature range of 50–150oC as well as a major mass loss rate due to pyrolysis of key fiberconstituents such as cellulose, hemicellulose and lignin between 260 and 350oC. Also it was observed thatas the percentage of banana in the hybrid fiber increases the speed of high temperature mass loss reduces.

Abstract: The panel attached in bulletproof vests must fulfill the standard of NIJ 0101.06. It must resist the penetration of the bullet and has a back-face signature that does not exceed 44 mm by ballistic testing. This research included both numerical simulation and ballistic tests for validation using type IV ballistic bullet. This research involved composite epoxy-HGM-hemp (Boehmeria Nivea) and epoxy-HGM-sisal (Agave Sisalana) as bulletproof panel materials with their woven-thickness characteristic. The properties of materials are obtained by performing ASTM D3039 test. As a result, by varying the thickness or each amount of layer, the thinnest panel of each material that fulfills the standard of NIJ 0101.06 is obtained.

Abstract: The shear behavior of masonry strengthened with natural fabric-reinforced cementitious matrix (NFRCM-strengthened masonry) is investigated through two different numerical models: a multi-layer model considering masonry and reinforcement as different materials and a multi-step homogenized model, where reinforced masonry is considered as a whole. The approaches are compared by performing nonlinear numerical pushover analysis with an increasing shear action applied to the panels. The parametric analysis shows the capacity and limits of both continuous diffused models – defined as a multi-or a single layer - to represent reinforced masonry in-plane behavior.

Abstract: This study presents results of an experimental investigation conducted to investigate the mechanical properties of sisal and glass fiber reinforced concrete. Four basic concrete mixes were considered: 1) Plain concrete (PC) containing ordinary natural aggregates without any fibers, 2) sisal fiber reinforced concrete (SFRC), 3) sisal and glass fiber reinforced concrete (SGFRC), 4, glass fiber reinforced concrete (GFRC). Investigated properties were compressive strength, splitting tensile strength, flexural tensile strength and workability. The results of fiber reinforced concrete mixes were compared with plain concrete to investigate the effect of fibers on the mechanical properties of fiber reinforced concrete. It was determined that addition of different kinds of fibers (natural and synthetic) is very useful to produce concrete. The addition of fibers was resulted into higher compressive strength, splitting and tensile strength. However, the workability of the fiber reinforced concrete was found lower than the plain concrete due to the addition of fibers in the concrete.

Abstract: The potential of natural resources such as pumice and sisal fiber for simple housing structural components is investigated in this research. Behavior of sisal fiber reinforcement of lightweight concrete beam under flexural loading was examined. The purpose of this study is to identify the prospect of sisal fiber as a replacement of steel bar reinforcement for structural element. The variations of reinforcement ratios were considered in order to optimize the performance of sisal fiber reinforcement. Twelve beam specimens size 100 x 150 mm with clean span of 1.5 m were examined in this investigation. Four variations of beam reinforcement were explored consist of 3 sisal fiber variation and 1 steel reinforcement as a control; where every variation was presented with three samples. Enerpac hydraulics Jack with 50 ton capacity connected to the load cell was operated as a source of loading. LVDT was fitted in the mid-span to measure vertical deflections during the loading. Test results indicated that the crack moment experiments were higher than the crack moment calculations. The valued were 1.44, 1.52, and 2.72 higher for sisal fiber reinforcement of B-LF, B-MF and B-HF, respectively. Whilst for steel reinforcement of B-LS the valued were 3.32 higher. Observation results also indicated that the moment resistant capacities of the specimens were twice higher compare to the calculated moment capacity. However, The lowest sisal reinforcement (B-LF) has only about 10% different service moment compare to the steel reinforcement (B-LS) where they both have equal ρ = 1.206 %. This indicate that the use of sisal fiber have considered as insignificant different service moment capacity to the steel reinforcement.

Abstract: Now-a-days traditional materials are replacing the natural fibres in automobile components like dashboards, seat-backs and interior trims due to its properties like light weight, environment friendly, good stiffness and high strength to weight ratio . In the study three different continuous fibres, Acacia, Jute and Sisal were mixed in varying proportion with GFRP and epoxy resin on a determined ratio basis to get three different composite samples. These fibres were alkaline treated and moulded using compression moulding and hand lay-up technique. These samples were tested for their Tensile and Impact strengths to find the specimen with higher strength. Scanning Electron Microscope (SEM) test was also conducted to study the structure of all three specimens after tensile test. The study concludes that the sample ‘A’ which has maximum content of sisal has higher tensile strength than other two samples. Similarly impact test concludes that specimen ‘B’ and ‘C’ which has maximum content of Jute and Acacia has equal and higher strength.

Abstract: Fiber concretes have been revolutionizing the market, as well as lower operating costs, structurally act. The total or partial replacement of steel with natural fiber reinforced concrete could be an economical way to provide an alternative method to achieve greater security in concrete structures, as well as a way to use materials that are energy efficient, economic and ecological.Sisal fiber reinforcement is promising for use in composite materials, due to their low cost, low density, high strength and specific modulus, without risk to health, readily available in some countries and renewal.We studied four different dosages of concrete: without fiber, with two different types of polypropylene (PP) fibers and with sisal fiber. Consistency of fresh concrete, bulk density, water absorption, capillary absorption, compressive strength and microstructural properties values of the samples were investigated.Regarding the consistency of fresh concrete, measured by testing Abrams cone, as the results show a substantial difference between the flowability of the concrete without addition of fibers and other dosages with different types of fibers studied. The compressive strength test at 7 and 21 days also shows resistance as early ages performed fiber, while with increasing days of curing, the resistance becomes a reaction product of cement and pozzolanic water have no effect added fiber. Absorption tests and capillary absorption of water, like the above, consistent with the results shown bibliographic polled, the results being higher in both assays for dosages comprised of PP and sisal fibers.

Abstract: To achieve sustainability in the composite industry, natural fibers must be able to replace synthetic fibers .In this work the tensile properties of sisal fibers were determined. The relationships between tensile strength, young modulus, failure to strain and gage length was studied. Also variation in tensile strength was quantified using statistical analysis. The relationship between Weibull statistics and gage length were also investigated. The strength of the sisal fiber obtained in this work was between 255-377 MPA and decreased with an increase in gage length. The Weibull modulus obtained was similar for all gage lengths and was around 2.5.