A Cost-Benefit Analysis of Roof Tiles with Polyethylene Terephthalate and Concrete Waste in Construction Industry

Abstract

Roofing is an essential aspect in construction as it acts as the cover in between the interior and exterior of the structure. With the growing concern in sustainability and affordability in the construction industry, the utilization of recycled materials is becoming rampant. That said, the use of Polyethylene Terephthalate (PET) and concrete waste in the form of fine recycled concrete aggregates are employed in the formulation of roof tiles. This study observed three (3) ratios consisting of 50% PET and 50% concrete waste, 60% PET and 40% concrete waste, and 40% PET and 60% concrete waste. This experimental research aimed to determine the drop resistance, water absorption rate using American Society for Testing Materials (ASTM) C140 and ASTM D570, heat resistance using Differential Scanning Calorimetry in compliance to ASTM D3418, and scratch resistance using Mohs Hardness Scale of the roof tiles with PET and concrete waste. The 50% PET and 50% concrete waste governed with positive results on the implemented testing methods. A simple cost-benefit analysis was created based on the findings on the 50% PET and 50% concrete waste, with the selected concrete roof tiles, clay roof tiles, and galvanized roof which aims to initiate the use of roof tiles with PET and concrete waste in the manner of achieving sustainability and affordability of materials in the construction industry.