A1 Journal article (refereed), original research

The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties

Publication Details

Authors: Lahtela Ville, Hyvärinen Marko, Kärki Timo

Publisher: Journal of Visualized Experiments (JoVE)

Publication year: 2020

Language: English

Related journal or series: Journal of Visualized Experiments

Issue number: 160

ISSN: 1940-087X

eISSN: 1940-087X

JUFO level of this publication: 1

Digital Object Identifier (DOI): http://dx.doi.org/10.3791/61064

Permanent website address: https://www.jove.com/video/61064/the-effect-construction-demolition-waste-plastic-fractions-on-wood

Open Access: Not an Open Access publication


Construction and demolition waste (CDW), including valuable materials such as plastics, have a remarkable influence on the waste sector. In order for plastic materials to be re-utilized, they must be identified and separated according to their polymer composition. In this study, the identification of these materials was performed using near-infrared spectroscopy (NIR), which identified material based on their physical-chemical properties. Advantages of the NIR method are a low environmental impact and rapid measurement (within a few seconds) in the spectral range of 1600-2400 nm without special sample preparation. Limitations include its inability to analyze dark materials. The identified polymers were utilized as a component for wood-polymer composite (WPC) that consists of a polymer matrix, low cost fillers, and additives. The components were first compounded with an agglomeration apparatus, followed by production by extrusion. In the agglomeration process, the aim was to compound all materials to produce uniformly distributed and granulated materials as pellets. During the agglomeration process, the polymer (matrix) was melted and fillers and other additives were then mixed into the melted polymer, being ready for the extrusion process. In the extrusion method, heat and shear forces were applied to a material within the barrel of a conical counter-rotating twin-screw type extruder, which reduces the risk of burning the materials and lower shear mixing. The heated and sheared mixture was then conveyed through a die to give the product the desired shape. The above-described protocol proved the potential for re-utilization of CDW materials. Functional properties must be verified according to the standardized tests, such as flexural, tensile, and impact strength tests for the material.

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Last updated on 2021-16-03 at 12:47