Evaluation of the Pipe Burst Strength of Three Species of Bamboo
Keywords:
Bamboo pipe, Burst strength, Monopodial bambooAbstract
The pipe burst strength (P.B.S) of three species of monopodial bamboo namely Phyllostachys viridis, Phyllostachys boryana and Phyllostachys mazelli were investigated to determine their suitability for water conveyance. Matured samples of the three species were obtained from the same farm in Anduze, Le Gard in France. Thirty selected samples each of the species, free of drying defects such as splits and cracks, were tested for the P.B.S evaluation.
The highest pressures (P.B.S) sustained before bursting were 5.45x105 N/m2, 8.05 x 105N/m2 and > 9.20 x 105 N/m2 for P. viridis, P. boryana and P. mazelli respectively. Samples with nodes were observed generally to give higher values of P.B.S than those without nodes. Also samples from the bottom section of the culm give highest value when compared to those from the middle and top sections of the culm.
Statistical analysis of the P.B.S. for the three species showed that there were significant differences (at P<0.05).The values of the P.B.S. are low when compared to that of Aluminium pipe (13.8-32.4 x 105N/m2) However, the value of P.B.S for P. mazelli is comparable to that of the PVC (8.75-17.9 x105N/m2) and Arundinaria alpina (6 x 105 N/m2) used in Tanzania for rural water supply.
In conclusion, by comparison, P. mazelli is potentially more suitable for water conveyance based on its pipe burst strength than the other two species studied.
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