Physical and strength properties of Bambusa striata
- 40 Downloads
Strength properties of round bamboo Bambusa striata were determined under static bending and compression parallel to grain tests in air dry and green conditions taking with node and without node at centre of the test specimens from bottom, middle & top portions of the culms. The results show that strength properties i.e. fibre stress at elastic limit (FS at EL), modulus of rupture (MoR), modulus of elasticity (MoE), and maximum crushing stress (Max. CS) are always found higher in air dry than green condition. The presence of node at the centre of the specimen increases strength properties i.e. FS at EL, MoR, and MoE (except Max. CS) significantly in green condition. However difference in ‘Max. CS’ determined in presence and absence of node at the centre of the specimens is found to be statistically non –significant at 95% confidence level. The result also indicates that strength properties occurs maximum at the top and minimum at the middle portion and wall thickness minimum at top and maximum at bottom portion of the bamboo. Bambusa striata species has also been classified (strength wise) on the basis of MoE, MoR, and Max. CS in green condition and found to fall in Group-III for construction purposes.
KeywordsSp. gr. FS at EL MoR MoE Max. CS Wall thickness
The authors are thankful to the Director, Forest Research Institute, Dehradun for encouraging and providing facilities for carrying this work. Authors are also thankful to the Head, Forest Products Division, Dr. Sadhana Tripathi, Scientist–G, Forest Products Division and staff of Timber Mechanics Discipline for providing guidance, encouragement as and when required and for technical support.
- Anon (1973) Method of tests for round bamboos. IS: 6874, Indian Standard Institution, Manak Bhavan, 9 Bahadur Shah Zafar Marg, New DelhiGoogle Scholar
- Falayi FR, Soyoye BO (2014) The influence of age and location on selected physical and mechanical properties of bamboo (Phyllostachys pubesces). Int J Res Agric For 1(1):44–54Google Scholar
- Mohamod AL, Ariffin WTW, Ahmad F (1990) Anatomical features and mechanical properties of three Malaysian bamboos. J Trop For Sci 2(3):227–234Google Scholar
- Narasimhamurthy CM, Nadanwar A, Pandey CN (2013) A study on physico- mechanical properties of Thyrsostachy ssiamensis (Kurz) Gamble and Dendrocalamus membrances (Munro) in Tumkur district, Karanataka, India. Int J Curr Microbiol Appl Sci 2(2):62–66Google Scholar
- Rajput SS, Gupta VK, Sharma SD (1992) Classification & grading of bamboos for structural utilization and their safe working stresses. J Timb Dev Assoc 38(2):19–32Google Scholar
- Sakaray H, Togati NVVK, Reddy IVR (2012) Investigation on properties of bamboo as reinforcing material in concrete. Int J Eng Res Appl 2(1):77–83Google Scholar
- Sekhar AC, Gulati AS (1973) A note on the physical and mechanical properties of Dendrocalamus strictus from different localities. Van Vigyan 11(3 & 4):17–22Google Scholar
- Sekhar AC, Rawat BS (1956) Strength test on bamboos. Indian Forest Leaflet No. 147, (Timber Mechanics), Manager of Publications, DelhiGoogle Scholar
- Shukla NK, Singh RS, Sanyal SN (1988) Strength properties of eleven bamboo species and study of some factors affecting strength. J Ind Acad Wood Sci 19(2):63–80Google Scholar
- Wahab R, Mustafa MT, Rahman S, Salam MA (2012) Relationship between physical and strength properties of 3- years cultivated tropical bamboo Gigantochloa scortechinii. ARPN J Agric Biol Sci 7(10):782–791Google Scholar