Utilization of plastic bottles and fiber mask in eco-friendly concrete mixtures

Abstract

Eco-friendly concrete uses less waste material which has less negative impact on the environment. This research utilizes PET plastic bottles and masks as a substitute for aggregate in concrete. The aim is to find out whether the compressive strength of eco-friendly concrete meets the requirements of structural concrete. The method used is planning mix design on seven samples, one sample of normal concrete and six samples of concrete with replacement of aggregate composition. Samples with aggregate replacement were designed from variations of 0.1%, 0.2% and 0.3% by weight of cement and PET plastic bottles with composition variations of 5% and 10% of coarse aggregate. The test results of the average compressive strength of concrete for 28 days are 235 KN/m2 for normal concrete; 117 KN/m2, 85 KN/m2; 149 KN/m2; 64 KN/m2, 42 KN/m2 and 21 KN/m2. The highest average compressive strength was obtained at 149 KN/m2 but did not reach the design compressive strength of 235 KN/m2. It can be concluded that the use of substitute aggregates from PET plastic bottles and masks did not get concrete results that match the compressive strength of the plan, but the concrete still meets the requirements for the compressive strength of low-strength structural concrete.