Innovative Bio-composite Sandwich Wall Panels made of Coconut Bidirectional External Veneers and Balsa Lightweight Core as Alternative for Eco-friendly and Structural Building Applications in High-risk Seismic Regions
González Oswaldo Mauricio, Barrigas Hua Lun, Andino Nathaly, García Andrés, Guachambala Marcelinodownload PDF
Abstract. The research that constitutes this paper is based on a series of publications that aimed at understanding, from an engineering perspective, the optimised mechanical efficiency of senile coconut palm stem-tissues as foundation for non-traditional building applications. Particularly, this study aims at determining, evaluating and analysing the mechanical properties of lightweight bidirectional sandwich-like structure wall panels made of balsa core material and coconut external veneers. To achieve these objectives, 10 test specimens cut from prototype panel 1 (1200 mm high, 600 mm wide and 124 mm total thick) and 10 test specimens cut from prototype panel 2 (1200 mm high, 600 mm wide and 74 mm total thick) were investigated under mechanical and seismic behaviours in accordance to the current American Society for Testing and Materials (ASTM) building standards. Preliminary results show that the proposed wall panels are up to two and three times more efficient, in terms of mechanical high-performance, than equivalent sections of solid wall bricks and concrete block walls, respectively. Therefore, the innovative panels constitute a feasible alternative to reduce/replace typical construction materials (e.g. steel, concrete and bricks) with a significant positive environmental impact that fully address current engineering requirements. These bio-panels are meant to be used as important non-traditional elements during the rebuilding process of low-rise and mid-rise residential buildings that were dramatically affected during the 2016 Ecuador earthquake.
engineered wood products, biomaterial mechanical characterization and mechanical efficiency, Cocos nucifera L, Ochroma pyramidale
Published online 4/20/2019, 11 pages
Copyright © 2019 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: González Oswaldo Mauricio, Barrigas Hua Lun, Andino Nathaly, García Andrés, Guachambala Marcelino, Innovative Bio-composite Sandwich Wall Panels made of Coconut Bidirectional External Veneers and Balsa Lightweight Core as Alternative for Eco-friendly and Structural Building Applications in High-risk Seismic Regions, Materials Research Proceedings, Vol. 11, pp 88-98, 2019
The article was published as article 5 of the book By-Products of Palm Trees and Their Applications
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
 SENPLADES, Secretaría Nacional de Planificación y Desarrollo, Evaluación de los costos de reconstrucción: Sismo en Ecuador, April 2016.
 S.G.R., Secretaría de Gestión de Riesgos, Informe de Situación N°71– 19/05/2016 (20h30) Terremoto 7.8 Pedernales, 2016.
 C. Beall. Masonry and Concrete, ISBN: 978-0070067066, 2000.
 J.S. Gregg, R.J. Andres, G. Marland, China: Emissions pattern of the world leader in CO2 emissions from fossil fuel consumption and cement production, Geophysical Research Letters, ISSN: 1944-8007, 35-8 (2008). https://doi.org/10.1029/2007gl032887
 J.G. Vogtländer, N.M. van der Velden, P. van der Lugt, Carbon sequestration in LCA, a proposal for a new approach based on the global carbon cycle; cases on wood and bamboo. The International Journal of Life Cycle Assessment, ISSN: 0948-3349, 19-1 (2014) 13-23. https://doi.org/10.1007/s11367-013-0629-6
 C. Sim, E. Villalobos, J.P. Smith, P. Rojas, S. Pujol, A. Puranam, L. Laughery, Performance of Low-rise Reinforced Concrete Buildings in the 2016 Ecuador Earthquake, Purdue University Research Repository, DOI: R7ZC8111, 10 (2017).
 U. Wegst, M. Ashby, The mechanical efficiency of natural materials. Philosophical Magazine, ISSN: 1478-6435, 84-21 (2004) 2167-2181. https://doi.org/10.1080/14786430410001680935
 O.M. González, K.A. Nguyen. Influence of density distribution on the mechanical efficiency of coconut stem green tissues, World Conference on Timber Engineering, Austria, Vienna, ISBN: 978-390303900-1, 2016.
 O.M. González Mosquera. The Ingenious Tree of Life – A Biomechanical Approach to Cocowood Science, Lambert Academic Publishing, Germany, ISBN: 978-613-9-87000-4, 2018.
 O.M. Gonzalez, K.A. Nguyen, Senile coconut palms: Functional design and biomechanics of stem green tissue, Wood Material Science & Engineering, ISSN: 1748-0272, 12-2 (2017) 98-117. https://doi.org/10.1080/17480272.2015.1048480
 M. Osei-Antwi, J. De Castro, A.P. Vassilopoulos, T. Keller, Shear mechanical characterization of balsa wood as core material of composite sandwich panels, Construction and Building Materials, ISSN: 0950-0618, 41 (2013) 231-238. https://doi.org/10.1016/j.conbuildmat.2012.11.009
 E. Pulgar, P. Soto, E. Flores, S. Vavra, J. Conde, S. Parada, Mechanical characterization and seismic behaviour of cross laminated timber panels made of Chilean radiata pine, World Conference on Timber Engineering, WCTE, ISBN: 978-390303900-1, 2016.
 H. Bailleres, L. Denaud, J.-C. Butaud, R. Mcgavin, Experimental investigation on rotary peeling parameters of high density coconut wood, BioResources, DOI: 10.15376, 10-3 (2015) 4978-4996. https://doi.org/10.15376/biores.10.3.4978-4996
 A.C. Ugural. Mechanics of Materials, John Wiley & Sons Inc. New Jersey Institure of Technology, United States of America, ISBN: 978-0-471-72115-4, 2008.
 O.M. González, K.A. Nguyen, Cocowood Fibrovascular Tissue System—Another Wonder of Plant Evolution, Frontiers in Plant Science, ISSN: 1664-462X. DOI: 10.3389/fpls.2016.01141, 7-1141 (2016). https://doi.org/10.3389/fpls.2016.01141
 O.M. Gonzalez, B.P. Gilbert, H. Bailleres, H. Guan, Senile coconut palm hierarchical structure as foundation for biomimetic applications, Applied Mechanics and Materials – Advances in Computational Mechanics, DOI: 10.4028, 553 (2014) 344-349. https://doi.org/10.4028/www.scientific.net/amm.553.344
 O.M. Gonzalez, B.P. Gilbert, H. Bailleres, H. Guan. Compressive strength and stiffness of senile coconut palms stem green tissue. 23rd Australasian Conference on the Mechanics of Structures and Materials, ACMSM23. Byron Bay, Australia, ISSN: 978-0-994152-00-8, (2014) 881-886.
 O.M. Gonzalez, B.P. Gilbert, H. Bailleres, H. Guan, Shear mechanical properties of senile coconut palms at stem green tissue, 4th International Conference on Natural Sciences and Engineering (2015ICNSE), Kyoto Research Park, Japan, ISSN: 978-986-87417-8-2, (2015) 529 – 543.