Sustainability of Tire-Derived Aggregate Concrete: A Case Study on Energy, Emissions, Economy, and ENVISION

Abstract

This paper aims to assess the benefits of substituting conventional aggregates in concrete with alternative aggregates obtained from recycled tires, also known as tire-derived aggregate (TDA). Existing literature is rich on mechanical properties and performance measures of TDA concrete (TDAC). These literatures agree that TDA reduces the strength of the concrete based on their volume content. However, it is also evident that application of TDA is highly effective in the enhancement of toughness and energy absorption of concrete elements. The recycled nature of TDA also provides significant opportunities to reduce the environmental footprint of concrete through preservation of natural resources and reduction of waste and pollution. At the same time, the recycling process of producing TDA is an adjustable procedure to allow for an optimum balance between the quality and the cost of materials. This study evaluates such balance through consideration of input energy, greenhouse gas emissions, and market pricing. Further, comparative assessments in this paper discuss the application of ENVISION as a decision making tool to facilitate such evaluations.