RECYCLING CONSTRUCTION AND DEMOLITION WASTE AND INDUSTRIAL BY-PRODUCTS TOWARDS REDUCING CARBON EMISSIONS FOR CONCRETE IN VIETNAM

Abstract

In recent years, Vietnam has been in a period of rapid infrastructure development accompanied by a rapid increase in the demand for construction materials. The amount of natural aggregates is currently being overexploited, leading to a serious shortage in the supply, while also causing huge impacts on the environment. In addition, current industrial production also emits a huge amount of industrial by-products. These by-products will occupy large areas of landfill, causing serious environmental issues. This study proposes a method of recycling construction and demolition waste and industrial by-products in concrete towards a circulation economy, promoting sustainable development and minimizing environmental impacts. The results show that the use of construction and demolition waste to produce recycled aggregates combined with fly ash and blast furnace slag to produce an environmentally friendly concrete is an effective measure to reduce carbon emissions up to 67% while still ensuring the performance of concrete.