Basic Behaviour of Natural Banana Stem Fiber Reinforced Concrete Under Uniaxial and Biaxial Tensile Stress

Abstract

ABSTRACT:In order to study the basic behavior of natural banana stem fiber reinforced concrete, three type of tensile strength test namely split tensile strength, flexural strength and biaxial fatigue flexure strength were conducted. Comparison of these three type of tensile strength, their crack pattern and the way they fails were be analyzed and discussed. Results showed that the flexural strength value of the two type of biaxial tests are higher than the uniaxial test result( ASTM C-1550 have 47.046 % higher than ASTM C-78 and 37.871 % higher than ASTM C-496). The value of tensile strength as measured by ASTM C-1550-02 is slightly higher than the value of the flexural tensile strength as measured by the biaxial flexure test (21.062%). The lines of the crack pattern do not show clear macro fracture cracks before reaching the peak load. As observed, there are two peak load values found were the one occurred at the first cracked, after that the load stress curve decrease for a while and after a few seconds the load increase again to a value smaller than the first peak load value.This is because at the time of the first cracking in three axes symmetry, the load that can be maintained by the concrete specimen had reached its maximum but after that the load increase again because the stress has been transferred to the fiber, so the stress rises again until the fiber break off. This indicates that the fiber plays an important role in holding and redistributed the tensile load.

Influence of Plantain Pseudostem Fibres and Lime on the Properties of Cement Mortar

“…e average diameter of the fibres measured is 0.65 ± 0.26 mm, specific weight is 0.35 g/cm 3 , and water absorption of about 245%. e fibres were cut to length of aspect ratio of 100 (65 mm).…”

“…More attention should be paid to the application of natural fibres as building materials for the purpose of conserving energy [2]. e application of natural fibre in mortar and concrete as admixture can contribute to the reduction of environmental challenges caused by waste disposal [3]. Today, the advancement of cement-based composites has seen innovations and techniques in designs that are economically and environmentally responsive and seek to utilize raw materials that are abundantly available.…”

“…Malarvizhi et al [8] investigated the properties of concrete slabs reinforced with banana fibres, which yielded a positive effect with significant improvement in the compressive and tensile strengths. Kumaat et al [3] studied the characteristics of concrete reinforced with banana stem fibre, which obtained improvement in flexural and tensile strengths of concrete. Zhu et al [2] studied the properties of reinforced cement composites with banana fibres and found improvement in flexural and fracture toughness which are adequate for use as building material.…”

Experimental investigation on the physical, microstructural, and mechanical properties of hemp limecrete

“…However, the hemp fiber reinforced limecrete specimen reveals a number of microscopic fractures and cavities. The presence of random fibers in the matrix generates a binding effect, increased toughness, and reduced shrinkage in composite materials, as reported by researchers 42 – 44 . Therefore, the introduction of hemp fibers into the mortar can lead to an improvement in both the compressive and tensile strengths of the specimens.…”