A multi-scale investigation of the mechanical behavior of durable sisal fiber cement composites

Abstract

Durable sisal fiber cement composites reinforced with long unidirectional aligned fibers were developed and their mechanical behavior was characterized in a multi-scale level. Tensile tests were performed in individual sisal fibers. Weibull statistics were used to quantify the degree of variability in fiber strength at different gage lengths. The fiber-matrix pull-out behavior was evaluated at several curing ages and embedded lengths. The composite's mechanical response was measured under direct tension while crack formation was investigated using a high resolution image capturing procedure. Crack spacing was measured using image analysis and correlated with the applied strain under both the tensile and bending response.

Effect of hot water and corona discharge treatments on the bonding behavior of jute fibers in polyester matrix

“…As described by Silva et al [56], the ideal pullout test presents four distinct regions, showing a rapid linear elevation of the load in the first region, followed by a loss of linearity due to the beginning of fiber interfacial detachment in the second region. The peak corresponds to the third region, where the fiber is partially separated from the matrix, reaching the maximum value (P ad ), where the shear strength is defined as the adhesion stress ( ad ).…”

Mechanical Characterization of Gigantochloa Scortechinii Bamboo Fiber with E-Glass/Epoxy Hybrid Composites

“…DK composite provided the woven roving Eglass a fiber (E2-4533 6000) with an elastic modulus of 72.5 GPa and a density of 2.59 gm/cc. The fiber is composed of the following ingredients in weight percentages: silicon oxide (54), aluminum oxide (15), calcium oxide (17), boron oxide (8), and magnesium oxide (4.5).…”

“…Similar results were observed by Ray and Rathore [14], where the lack of bonding between matrix and fiber interfaces, fiber content, voids among fibers, inhomogeneity, and defects of the fiber seriously degraded the tensile strength of the composite. Silva et al [15] found that the use of sisal fiber for continuous strengthening in multi-layered cementitious composites indicated several cracking behaviors under tensile loading. The fracture lines and matrix cracking appeared on the surfaces with poor interfacial bonds.…”

Mechanical behavior of cement composites reinforced by aligned Enset fibers

“…The authors also found that the corrugation of the flat sheets increased their ultimate bending load by about 260 % and the developed material presented multiple cracking behavior under bending, even after being subjected to 6 months of hot-water immersion at 60 o C [33]. These continuous fiber reinforced cement-based composites are a new class of sustainable construction materials with superior tensile strength and ductility [34], sufficient to be used as load-bearing structural members in applications such as impact-resisting panels, repair and retrofit, earthquake remediation, strengthening of unreinforced masonry walls and beam-column connections [35], [36].…”