Abstract
The need for maximum disposal of wastes and conservation of scarce resources or materials into useable building materials need to be underscored. Therefore, this study attempts to evaluate the use of polythene bag wastes in the building industry. The polythene bags waste (pure water sachets bags) were collected in dumping sites in Yola metropolis and were manually shredded to about (5 x 10) mm sizes. Fired Cement clay (FCC) bricks incorporating the polythene waste were produced at a mix ratio of 1:8 and water/cement ratio of 0.5. Samples were tested for compressive strength at 7, 14, 21 and 28days hydration period while the water absorption and thermal conductivity test were evaluated at 28 days hydration period. Result of the compressive strength for the FCC Bricks at 28 days hydration period was between 0.00 and 2.33N/mm 2 , with 10% FCC having the highest compressive strength and least water absorption values of 2.01N/mm 2 and 85 Kg/mm 3 respectively. The compressive strength and thermal conductivity of all sampled FCC bricks decrease with increase percentage content of shredded polythene bags waste. The study found that thermal conductivity values of the FCC bricks was in the range of 1.48w/mk and 1.8w/mk. The study therefore recommends 10% FCC as suitable for use in areas where thermal transfer and rising dampness is of interest. Furthermore, the study concludes that reuse of the polythene bag wastes as building material or resources will help in reducing environmental hazards.
Highlights
The environmental impact arising from discarded polythene is evident in Nigeria with plastic bags waste littered everywhere especially the popular pure water bags [1]. [2] opined that, a substantial growth in the consumption of plastic is observed all over the world in recent years, which increases the production of plastic-related waste
The results further indicate that the compressive strength of the clay bricks for different mix ratios range from 1.14N/mm2 -1.49/mm2 as curing age increases from 7 to 28 days, considering cement/clay mix ratio of 1:12
This study with the aim of assessing the performance of Fired polythene bags bricks conclude that: The Fired Cement clay (FCC) bricks all have lesser compressive strength compare with the control bricks the at all hydration period
Summary
The environmental impact arising from discarded polythene is evident in Nigeria with plastic bags waste littered everywhere especially the popular pure water bags [1]. [2] opined that, a substantial growth in the consumption of plastic is observed all over the world in recent years, which increases the production of plastic-related waste. Fired Cement Clay Bricks for Sustainable Drive rapidly increased and they have replaced other materials such as metals and glass. The study recommends a reduction in the cement/sand and cement/clay mix ratios employed for both sandcrete hollow blocks and cement stabilized clay bricks to ratio 1:8 or 1:7 to enable the blocks to achieve the recommended 2-2.5N/mm compressive strength for load bearing wall component in building. The research concludes that addition of polythene fibres to sandcrete blocks will increase the tensile strength of sandcrete blocks and can limit the propagation of cracks It is based on the aforementioned; that this study intends to determine an optimum quantity of shredded polythene waste that can be added to fired cement clay bricks without affecting the structural integrity of the fired clay bricks, with the aim of creating friendly environment through the reuse of polythene bags waste
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