Flowability and Compressive Strength of Controlled Low-Strength Material Made from Plastic Bottle cap Waste as Fine Aggregate Replacement

Abstract

Nowadays, an increasing of single-used plastic waste amount becomes one of serious environmental issues. This research aims to investigate the mechanical properties of controlled low-strength material (CLSM) made from plastic bottle cap waste. Plastic bottle cap waste was used as fine aggregate replacement at 20%, 30%, 40%, and 50% by volume of fine aggregate. Raw materials used in CLSM consisted of cement, fly ash, water, natural sand, and plastic bottle cap waste. The experimental program includes flow test and unconfined compression test at curing time of 7, 14, and 28 days. The test results show that slump flow and unconfined
compressive strength of CLSM mixes decreased with the increase in the plastic replacement content. However, mixtures with 30%, 40%, and 50% of plastic waste can still satisfy with the strength criteria of CLSM for using as pavement base material.