The Development of Concrete Mixed with Used Polyethylene Terephthalate replaced Some Coarse Aggregate

Abstract

The purpose of this research is to study the efficiency of concrete that mixed with recycled plastic bottles. In this study, we replaced some sand and stone with used plastic bottles in construction concrete. Percentage of substitute coarse aggregate with used plastic bottles are 5%,10%,15%,20%,25% and 30% by weight. The samples had been testing for compression at the curing age of 7,14 and 28 days. The results have shown that the more we increased plastic the lower the strength compare to typical concrete. The proper percentage of plastic is no more than 10 % by weight otherwise concrete strength would be decreased significantly. According to this percentage, concrete that mixed with used plastic bottles had an average strength of 217.4 ksc and it cost around 1938 baths per cubic meter which is 5% lower than typical concrete. For compression strength of 200 ksc and higher can be used in building structures for load-bearing. On the other hand, the lower cost of concrete that mixed with recycled plastic bottles with more than 10% of the weight which had a strength lower than 200 ksc can be used as sidewalks or lean concrete that does not require high load strength.