• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2021, Volume: 14, Issue: 27, Pages: 2272-2283

Systematic Review

An Experimental Study of Improvised Portable Manual Rebar Bender

Received Date:12 April 2021, Accepted Date:04 May 2021, Published Date:09 August 2021


Objective: To design, fabricate and evaluate the new features of a portable manual rebar bender, a Hand Tool that is used for bending rebar and other malleable materials. Methods: The researcher improves on the previously available portable manual rebar bender. Experts assessed the acceptability of this bender in terms of design and portability. Furthermore, as previously stated, the study significantly improves the usefulness of the inexpensively produced bending machine for reinforcing concrete with negligible human force. Findings: The device created has a valuable impact on the construction industry’s human force due to its affordability and marketability. Also,the present tools guaranteed strength, durability, and lightness in weight. Furthermore, the portable manual rebar is made of different elements such as a center axle, stationary backup roller, and sleeve. The results after ten trials showed that the portable manual rebar bender could finish 9 mm, 20mm, and 12 mm stirrup at an average of 24.3 seconds, 26.3 seconds, and 27.7 seconds, respectively. Additional results from seven to ten trials showed the bending time for 24 seconds stirrup for 9mm, 26 seconds stirrups for 10 mm, and 28 seconds stirrup for 12 mm. Furthermore, after a series of ten trials, the instrument achieved an accurate angle bent of 90 degrees. The M= 4.77 and 4.82 are very acceptable in terms of design and portability tools based on the evaluators’ rating. Novelty: The design is novel in terms of cost, portability, and efficiency. The device can be a great help in the structures and buildings. Furthermore, the construction industry will use the portable manual rebar bender to build houses and other local infrastructure to test its effectiveness. Then, the researcher is encouraged to engage in another research to try the innovation.

Keywords: Improvised; Innovative; Locally made; Device; Bender


  1. Rammert W. Technology and Innovation. In: InSoziologie-Sociology in therebarprocessing German-Speaking World. (pp. 515-534) De Gruyter Oldenbourg. 2021.
  2. Yazdami N, Riad M. Field assessment of concrete structures rehabilitated with FRP. Eco-Efficient Repair and Rehabilitation of Concrete Infrastructure. 2018. Available from: https://www.sciencedirect.com/topics/engineering/steel-bar
  3. Deepu S, Vishnu RS, Harish MT, Bhavani RR. An Experimental Study of Force Involved in Manual Rebar Bending Process. IOP Conference Series: Materials Science and Engineering. 2018;310(012050). Available from: https://dx.doi.org/10.1088/1757-899x/310/1/012050
  4. Nagarajan A, Sasi D, Rahul ES, Ranjith R, James J, Unnikrishnan R. Design and evaluation of a Haptic simulator for vocational skill Training and Assessment. IEEE. 2013;p. 6108–6113. Available from: 10.1109/IECON.2013.6700139
  5. Lim C, Hong WK, Lee D, Kim S. Automatic Rebar Estimation Algorithms for Integrated Project Delivery. Journal of Asian Architecture and Building Engineering. 2016;15(3):411–418. Available from: https://dx.doi.org/10.3130/jaabe.15.411
  6. Wang G, Cai Z, Dou X. Colorimetric logic design for rapid and precise discrimination of nitrate-based improvised explosives. Cell Reports Physical Science. 2021;2(2):100317. Available from: https://dx.doi.org/10.1016/j.xcrp.2020.100317


© 2021 Confesor. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)


Subscribe now for latest articles and news.