Suitable methods for recycled waste plastic

Researchers have identified that the concrete strength is investigated along a time interval of 7 to 28 days by using 1 to 3% of fine aggregate recycled waste plastic (polyethylene). It was also noticed that when waste plastic bottles increased from 0 to 5% of the sand in the mix than the Tensile and flexural strength of concrete decreased by the ratios of 12.81, 10.71 and increases by 4.1% respectively at 7 days. This concrete strength decrease by the ratios 7.93, 28.6 and 23.6% at 28 days. The rapid urbanization and industrialization all over the world has resulted in large deposition of waste polymer materials. The world’s annual consumption of plastic materials has increased from around 5 million tons in the 1950s to nearly 100 million tons in 2001. Plastic waste materials consist of surplus, obsolete, broken, old plastic furniture, different household plastic materials, equipment, anti-static packaging materials and devices made of plastic. These polymer wastes are almost non-degradable in the natural environment even after a long period of exposure.

Inclusion of polymer waste in concrete can be a proper utilization of this valuable property. Thus, utilization of waste polymer material in making concrete/mortar can be good solution to this environmental hazard. Very few information is available regarding recycling of polyurethane formaldehyde (PUF) -based polymer wastes and its use as construction materials. In the Dhaka city corporationarea, about 3,315 tons of solid waste had been generated per day during 2005,of which 4.15% was composed of plastic materials. In view of this, a unique, novel experimental work has been conducted. The safe use of plastic waste (plastic bags or plastic containers such as water bottle) is very important because plastics are normally stable and not biodegradable. In Iraq approximately 11.3 million tons of solid waste is produced annually. The aim of this research is to investigate the effect of two types of waste plastic on strength of concrete. Read more...........