HYGROTHERMAL RESPONSE OF PLANT FIBRE REINFORCED COMPOSITES

ABSTRACT The effect of soaking time and temperature response for coconut and raffia fibre reinforced composite on their mechanical properties have been studied. Tensile and compression test for treated and untreated were performed using a universal testing machine (Monsanto Tensometer). The conditioned samples in each case show better tensile and compressive strength compared to the untreated samples. Raffia fibre reinforced polyester showed a better mechanical and moisture absorption properties at various operating temperature in the study

Hygrothermal response of plant fibre reinforced composites

The effect of soaking time and temperature response for coconut and raffia fibre reinforced composite on their mechanical properties have been studied. Tensile and compression test for treated and untreated were performed using a universal testing machine (Monsanto Tensometer). The conditioned samples in each case show better tensile and compressive strength compared to the untreated samples. Raffia fibre reinforced polyester showed a better mechanical and moisture absorption properties at various operating temperature in the study © 2006-2014 Asian Research Publishing Network (ARPN)

Effect of green inhibitor on the corrosion behaviour of reinforced carbon steel in concrete

The effect of inhibitors on the corrosion behaviour of carbon steel reinforced in concrete exposed to 3.5% NaCl solution has been studied by electrochemical and weight loss tests. The corrosion potential and concrete resistivity were determined during the immersion time of the concrete specimens. The results show that calcium nitrite and vernonia amygdalina extract reduced corrosion rate compared to sodium nitrite. However, vernonia amygdalina inhibition was more effective in the immersed concrete in simulated seawater. The weight loss results demonstrated that 2% sodium nitrite was more effective with efficiency of 96% in comparison with 2% calcium nitrite and 6% vernonia amygdalina with efficiency of 92% and 75%, respectively. From the results, it is evident that the extract from vernonia amygdalina (bitter leaf) acts as an excellent corrosion inhibitor for rebar steel, efficiency increases with increase in dosage, and the inhibition mechanism was by physical adsorption which is responsible for shielding the specimen from corrosive environmen