Production of Plastic Waste Sand Blocks to Conform to Conventional Geometry

Authors : M. E. Gukas; M. Pam; Jonathan D. Chong; J. A. Adeosun

Volume/Issue : Volume 8 - 2023, Issue 7 - July

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Plastic has become a material that has gained acceptance for application in so many aspects of human activities and it is therefore widely used around the world. Its desirability for use is due to its versatility, compactness, light weight, ease of production and molding to fit an incredible wide range of needs. Part of the appeal of plastic comes from the fact that it can be reused. Common use of plastic materials include food and drugs packaging, production of bottles and all kinds of containers, household and work place items, electronics; the list is endless. In spite of the huge benefits of using plastic, it also generates huge amount of waste that is toxic to plants, animals and humans if not properly disposed. Plastic disposal is difficult due to its long decomposition period which may take up to 500 years and this has led to a huge environmental pollution crisis. This research presents results of experimental work on Plastic Waste Sand Blocks (PWSB) made from shredded Polyethylene Terephthalates (PET), High Density Polyethylene (HDPE) and sand. This is an attempt to further proffer solutions to plastic waste disposal. The research also tries to address concerns of accepting new sustainable strategies and technologies, therefore the test specimens were prepared using fabricated moulds to conform to conventional geometry for block moulds. A 1:3 and 1:4 plastic to sand mix ratio and batching by weight was adopted.Results obtained shows that the compressive strength of PWSB at 1:3 was 8.58N/mm2 and 9.01N/mm for 450×225×225 and 450×150×225 geometries respectively. For 1:4 mix, 9.20 and 12N/mm2 was recorded, with best results exceeding four times that of normal block (3.5N/mm2). It was also observed that the maximum density of PWSB at 1945.90Kg/m3 was less than that of the control sample at 2110.95Kg/m3. The water absorption of PWSB was found to be very minimal. It was therefore recommended that PWSB due to its high strength in conventional geometry can be used for construction purposes. It can also be used at foundation levels without DPC due to its negligible water absorption.


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31 - December - 2023

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