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By H.M.A. Mahzuz, Mushtaq Ahmed, Moon Moon Dhar, Sumaiya
Keywords: Compression, Elasticity, Stress, Strain, Water absorption, Water-cement ratio.
This research is conducted to examine the performance of concrete where bio-materials like rattan, wood and bamboo are used as coarse aggregate (CA). Related comparison is made with the concrete where conventional stone is used. Three mixing ratios -1:2:2, 1:2:2 and 1:2:4, having the same water to cement ratio were considered in this research. Full study was conducted by Ordinary Portland Cement (OPC) and sand of a constant FM. The maximum size of any coarse aggregate was kept below 19 mm. Curing of all samples was done for 28 days and crushing was performed after 56 days. Within this time both the absorption and evaporation of water were measured. Finally they were crushed to identify their strength. The Stress-strain curves were also gathered from these tests. Finally it is observed that the compressive strength of the concrete samples of bamboo, wood and rattan offer much less strength that of the concrete of stone. Yet they offer the strength that may be suitable for less load bearing structures. Also as the weight of concrete was much reduced and specific heat was increased a lot by the use of these bio-aggregates.