Effect of water absorption on the flexural strength of a green sandwich composite

Prabhakaran, S.; Krishnaraj, V.; Senthilkumar, M.; Zitoune, Rédouane; Shankar, Krishna

doi:10.3139/120.111330

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…The authors have already developed an NSP made of flax and agglomerated cork and tested its flexural strength, and the results showed that NSP has a higher specific flexural strength. 20 The secondary performance criteria such as thermal insulation, vibration damping, and sound absorption properties were also found to be good for the NSP. 5,21 In continuation with the work and to understand the mechanical behavior of sandwich panels, flatwise tensile tests, flatwise compressive tests, and edgewise compressive tests were carried out.…”

Section: Introductionmentioning

confidence: 88%

On the tensile and compressive behavior of a sandwich panel made of flax fiber and agglomerated cork

Prabhakaran

Krishnaraj

Senthilkumar

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Sandwich panels are used in buildings because of their light weight, thermal insulation, sound absorption, and better mechanical properties. Material scientists have been trying their best to replace synthetic materials as these are non-biodegradable. Stringent environmental policies, need for eco-friendly products, and problems in end-of-life disposal have made natural materials in sandwich panels the need of the hour. This research work attempts to replace the synthetic sandwich panels with natural sandwich panels without sacrificing the performance. The natural sandwich panels used in this work had agglomerated cork as the core and flax fiber as skin reinforcement. A vacuum-bagging technique was used to manufacture these panels with three core densities and three skin reinforcements. The performance of these panels was confirmed by conducting flatwise tensile, flatwise compressive, and edgewise compressive tests as per the American Society for Testing and Materials standards and the results are discussed in this article. The specific flatwise tensile strength of natural sandwich panels was 14–21% higher and the specific flatwise compressive strength was 2–10% higher than the synthetic sandwich panels. The edgewise compressive strength was found to be 32–34% lower than synthetic sandwich panels. The results suggest that natural sandwich panel could be a better alternative material for building applications.

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Section: Introductionmentioning

confidence: 88%

On the tensile and compressive behavior of a sandwich panel made of flax fiber and agglomerated cork

Prabhakaran

Krishnaraj

Senthilkumar

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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show abstract

“…[34][35][36] The concept of the sandwichcomposite was developed to reproduce the advantages of the I beam which serves as an efficient-structure since the maximum volume of material is placed on the flanges farthest away from the neutral axis. [37] This design helps in achieving greater material efficiency. A composite sandwich consists of three layers, the top and bottom layers consist of a thin material called skin.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, thermal, and acoustical studies on natural alternative material for partition walls: A novel experimental investigation

et al. 2022

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The construction industry shows great interest in the use of technologically advanced materials which are light, environmentally friendly, possess high strength and durability for floors, roofs, partitions, etc. Apart from mechanical properties, the material should also possess excellent thermal and acoustic properties. In the same context, the aim of this study is to explore the flexuralstrength, thermal-conductivity, flame resistance, and sound-absorption capabilities of natural based material made with jute fiber and agglomerated cork. The natural based partition wall (jute board [JB]) was manufactured using vacuum bag molding process. Other alternative materials used in this study for comparison are gypsum and particle boards. A flexural test was carried out and it was observed that the JB has 80% of higher flexural strength than other test samples. It is also having lower thermal conductivity of 52.8% and 43.3% than gypsum and particle board, respectively. The JB have 35% and 10% higher sound absorption capabilities than gypsum and particle board, respectively. This is attributed to the multi-scale arrangement and cellular structure of jute fiber and cork material. This study recommends that, if flame resistance of jute fiber is enhanced with help of flame retardants, JB that is, jute/cork sandwich panel could be an environmentally appealing alternative answer for use in the construction of partition walls.

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“…The result portrays that eco-friendly sandwich has good sound absorption capability due to the tortuous passage of fiber and natural honeycomb structure of the core. 1 The authors have developed a novel green composite sandwich made of flax fiber as skin reinforcement and agglomerated cork as core and tested for their mechanical properties and the results were published 20 The secondary performance criteria like vibration damping, sound absorption, thermal conductivity and flame retardant properties were also found to be good for green composite sandwich. 21,22 In continuation with the work, the present study focuses on assessing the biodegradability of a green composite sandwich made of flax fiber as skin reinforcement and agglomerated cork as core material in a natural soil burial environment and verified with morphological, spectrum and thermoanalytical tests.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation behaviour of green composite sandwich made of flax and agglomerated cork

Prabhakaran

Krishnaraj

Golla

et al. 2022

Polymers and Polymer Composites

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Material experts are striving to use natural resources as skin and core in composite sandwiches to achieve light weight, biodegradability, and cost benefits. This paper reports one such newly developed green composite sandwich and its biodegradable behavior. The skin and core of newly developed sandwich are flax fiber and agglomerated cork respectively. This composite sandwich is manufactured by vacuum bagging technique in order to get higher volume fraction of fiber. The biodegradability testing of the composite sandwich has been executed by soil burial test. The verification of the same has been done using Scanning Electron Microscope (SEM) images, Fourier Transform Infrared Spectroscopy (FTIR) analysis and Thermoanalytical test. The test results portray the percentage of weight loss in the specimens and that, it increases with burial time. It also depicts that the newly developed Green Composite Sandwich (GCS) has 82% higher degradation than the Synthetic Composite Sandwich (SCS) taken for the comparison. SEM images show that the green composite sandwiches have lost their fibrous structure and cell wall surface due to the degradation. FTIR and Thermoanalytical tests also confirm the biodegradability of the developed green composite sandwich.

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Effect of water absorption on the flexural strength of a green sandwich composite

Cited by 5 publications

References 34 publications

On the tensile and compressive behavior of a sandwich panel made of flax fiber and agglomerated cork

On the tensile and compressive behavior of a sandwich panel made of flax fiber and agglomerated cork

Mechanical, thermal, and acoustical studies on natural alternative material for partition walls: A novel experimental investigation

Biodegradation behaviour of green composite sandwich made of flax and agglomerated cork

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