MECHANICAL PROPERTIES AND FRACTURE BEHAVIOUR OF COCONUT FIBRE-BASED GREEN COMPOSITES

This paper presents the influence of natural fibre content on the mechanical properties of coconut fibre based-green composites. The mixture ratio of cement:sand by weight was fixed at 1:1. Coconut fibre was used as reinforcement and added to cement matrix to replace the sand composition. Cement matrix was reinforced with 3wt. %, 6wt. % and 9wt. % of coconut fibre by mixing and curing process. Composites were cured in water for 7, 14, and 28 days. It was observed that the composite reinforced with 9wt. % of coconut fibre demonstrated the highest strength of modulus of rupture and compressive strength. Lucrarea prezintă influenţa conţinutului de fibre naturale asupra proprietăţilor mecanice in crud ale unor compozite pe bază de fibre de cocos. Raportul masic al amestecului de ciment : nisip a fost fixat la 1:1. Fibrele de cocos au fost utilizate pentru inlocuirea nisipului din compoziţie si armarea matricii de ciment. Au fost utilizate adausuri de 3%, 6% si respectiv 9% fibre de cocos raportat la conţinutul de ciment, amestecurile fiind omogenizate si apoi păstrate in apă pentru 7, 14 si 28 zile. S-a demonstrat că cele mai mari rezistenţe la compresiune si incovoiere sunt dezvoltate in cazul probelor cu un conţinut de 9% fibre de cocos.