Experimental analysis of mechanical properties of the unconventional sand-plastic bricks using statistical method

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Journal of Engineering Science and Technology Review


Plastic wastes found in high percentage in the municipal solid wastes (MSW) have attracted consideration recently due to environmental safety issues. The plastic-wastes used as one of the raw-materials in the processing of construction related products, bricks in particular, is a new way of waste utilisation. Plastics are in use in several ways, right from the drinking bottles to household items, which in turn converts to waste once the functionality ends. Since the plastics, thermoplastics in particular are not biodegradable, one optimum way of using these plastic-wastes are essential for solving this problem of their increase in number. The main aim of this investigation is to comprehend the effects of plastic wastes (polyethylene terephthalate and high-density polyethylene) on the mechanical properties of bricks. The preparation of the brick had 10%, 25% and 40% of plastic wastes. The mixture of sand and plastic wastes, as per their percentage by weights, were placed in the preheated mould with 700 °C temperature, holding them at the peak temperature for 15 minutes. The molten mixture was poured in the fabricated mould and allowed to cool down. The prediction from the optimized response plot along with the real-time fabricating and testing of sand-plastic brick infers that the brick comprising 25% by weight of plastic yields the best sand plastic brick, exhibiting an average compressive strength of 133 MPa, which implies that it can withstand 72.59% more compressive stress than the commercially available Indian FCBs.

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